Plumbing License Lookup by State

• Who licenses. Alabama Plumbers and Gas Fitters Examining Board. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Alabama.
• Verify a license. Alabama Plumbers and Gas Fitters Board individual lookup Shows: Individual licenses of the Alabama Plumbers and Gas Fitters Examining Board: master plumber, journeyman plumber, apprentice plumber, master and journeyman gas fitter, medical gas and continuing education instructor. Plumbing and gas businesses are registered separately and appear in the board's Business lookup on the same portal. Birmingham, Huntsville and Montgomery issue permits but no plumbing licenses of their own. Search: Enter any combination of license number, last name, first name, county, license type or license status, all optional, and use the Print option to see the full license details. Check the master or journeyman doing the work in this individual lookup and the company in the Business lookup.

Checked against the official source, September 2026: alpgfb.igovsolution.net.

• Who licenses. Alaska Department of Labor and Workforce Development, Labor Standards and Safety Division, Mechanical Inspection Section (certificates of fitness); mechanical administrator licenses via the Division of Corporations, Business and Professional Licensing. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Alaska.
• Verify a license. Alaska Division of Corporations, Business and Professional Licensing search Shows: Individual plumber Certificates of Fitness (journeyman and trainee), issued by the Department of Labor's Mechanical Inspection Section, are not listed. The search covers mechanical administrator licenses (including the Unlimited Commercial and Industrial Plumbing (UCIP) and Residential Plumbing and Hydronic Heating (RPHH) types) and construction contractor registrations issued by the Division of Corporations, Business and Professional Licensing. Search: Choose the program 'Mechanical Administrators' or 'Construction Contractors', then search by license number, license type, DBA, owner or entity name, or city; tick 'Current Only' to hide expired licenses. This confirms the contractor registration and the mechanical administrator a plumbing contractor must employ; a journeyman's Certificate of Fitness has no online lookup, so ask the Mechanical Inspection Section by phone.

Checked against the official source, September 2026: www.commerce.alaska.gov.

• Who licenses. Arizona Registrar of Contractors (ROC). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Arizona.
• Verify a license. Arizona ROC contractor search Shows: The Arizona Registrar of Contractors issues commercial, residential and dual contractor licenses by classification, including the C-37 and CR-37 plumbing classifications, and the search shows status, qualifying party, officers, DBAs and complaint history. Arizona has no state journeyman or master plumber license; the ROC licenses the contracting business and its qualifying party, not individual plumbers. Search: Enter the six-digit ROC license number or the contractor or person name, first name then last name; Advanced Search adds city, classification, license type and status filters, and no field is required. Confirm the status is active and the classification covers plumbing.

Checked against the official source, September 2026: azroc.my.site.com.

• Who licenses. Arkansas Department of Health, Plumbing and Natural Gas Program (Protective Health Codes). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Arkansas.
• Verify a license. Arkansas Department of Health plumbing license search Shows: Arkansas Department of Health plumbing and natural gas licenses: master, journeyman and apprentice plumber, plumbing inspector, gas fitter and gas fitter supervisor; commercial contractors are handled separately by the Arkansas Contractors Licensing Board. There is no separate business lookup, so check the master plumber behind the company. Search: Filter the table by name, address, city, state, ZIP, license type, license number or expiration date range. A separate Plumbing Examiner's Sanctions search shows disciplinary actions.

Checked against the official source, September 2026: adhplumbinghvacrlookup.arkansas.gov.

• Who licenses. Contractors State License Board (CSLB), California Department of Consumer Affairs. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in California.
• Verify a license. CSLB contractor license check Shows: CSLB contractor licenses of every classification, including C-36 Plumbing Contractor, with license status, bond, workers' compensation and complaint disclosure, plus Home Improvement Salesperson (HIS) registrations. California licenses contracting businesses and their qualifying individuals, not journeyman plumbers, and cities such as Los Angeles, San Diego, San Jose, San Francisco and Sacramento issue permits but no plumber licenses of their own. Search: Search by contractor license number, contractor business name or contractor personnel name. Confirm that the license lists classification C-36 (plumbing) and shows Active status.

Checked against the official source, September 2026: www.cslb.ca.gov.

• Who licenses. Colorado State Plumbing Board, Division of Professions and Occupations, Department of Regulatory Agencies (DORA). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Colorado.
• Verify a license. Colorado Division of Professions and Occupations license lookup Shows: Every license issued through the Division of Professions and Occupations, including State Plumbing Board credentials: plumbing contractor registration, master plumber, journeyman plumber, residential plumber and registered apprentice plumber, with status (active, inactive, expired, suspended or revoked) and any discipline. Denver, Colorado Springs and Aurora require permits and city contractor registration but rely on the state plumber license. Search: Search by last and first name, business name, license number, or profession and license type, entering as much or as little as you want; a roster download is also offered. A plumbing contractor registration belongs to the business; the person doing the work needs a master, journeyman or residential plumber license, or must be a registered apprentice working under supervision.

Checked against the official source, September 2026: apps2.colorado.gov.

• Who licenses. Connecticut Department of Consumer Protection (Occupational and Professional Division; Plumbing and Piping Work Examining Board). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Connecticut.
• Verify a license. Connecticut eLicense Online lookup Shows: All licenses issued by Connecticut's Department of Consumer Protection (DCP), including plumbing credentials (P-1 unlimited plumbing contractor, P-2 unlimited plumbing journeyperson, P-6 and P-7 limited contractor and journeyperson, P-9 limited residential plumbing) and Home Improvement Contractor registrations; results show credential status, type and expiration date. Bridgeport, New Haven and Hartford do not issue plumber licenses. Search: Search by license number, license type, business name, DBA or nickname, first name, last name, or address (state, city, zip); DCP advises using one or two pieces of information, then checking 'Credential Status'. Contractor (P-1, P-6) and journeyperson (P-2, P-7) licenses are held by individuals, not companies, so verify the person named on the contract.

Checked against the official source, September 2026: www.elicense.ct.gov.

• Who licenses. Delaware Division of Professional Regulation, Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Delaware.
• Verify a license. Delaware DELPROS license lookup Shows: DELPROS, the Division of Professional Regulation's online licensing system, lists all Division licenses, including Board of Plumbing and HVACR Examiners credentials: Master Plumber, Master Plumber Restricted, Master HVACR, Master HVACR Restricted and Apprentice registrations, with license number, status and expiration. Delaware issues no journeyman plumber license; a plumbing business operates under a master plumber's license. Search: Individual search takes last name, first name, city, state, profession, type, or a license, application or approval number; facility search takes facility name, DBA, city, state, profession, type or number. Verify the master plumber named by the company; the state treats a DELPROS online check as official confirmation, at no charge.

Checked against the official source, September 2026: delpros.delaware.gov.

• Who licenses. Construction Industry Licensing Board, Florida Department of Business and Professional Regulation (DBPR). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Florida.
• Verify a license. Florida Department of Business and Professional Regulation license search Shows: Department of Business and Professional Regulation licenses, including Construction Industry Licensing Board contractors: Certified Plumbing Contractor (CFC prefix, valid statewide) and Registered Plumbing Contractor (RF prefix, valid only where the contractor holds a local competency card). Florida licenses plumbing contractors, not journeymen; journeyman and master competency cards come from the county. Search: Search by name, license number, city or county, or by license type: select Construction Industry, then the plumbing contractor categories. The result shows status, expiration, qualifying business and discipline; confirm the status reads 'Current, Active' and note whether the license is Certified (statewide) or Registered (valid only in the listed counties and cities).

Checked against the official source, September 2026: www.myfloridalicense.com.

• Who licenses. State Construction Industry Licensing Board, Division of Master and Journeyman Plumbers (Georgia Secretary of State, Professional Licensing Boards). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Georgia.
• Verify a license. Georgia Secretary of State license search Shows: Georgia Secretary of State professional licenses; the 'Master & Journeyman Plumbers' profession type returns Journeyman Plumber, Master Plumber Class I (single-family, two-family one-level and commercial work up to 10,000 square feet) and Master Plumber Class II (unrestricted) licenses. Plumbing licenses go to individuals only, so a plumbing company does not appear, only the master plumber who qualifies it. Search: Pick Individual, fill at least two fields, such as Last Name plus Profession Type 'Master & Journeyman Plumbers' or License Number plus Profession Type, and click Search. Atlanta, Columbus and Augusta issue no city plumber credential; their permit forms require the state license.

Checked against the official source, September 2026: goals.sos.ga.gov.

• Who licenses. Board of Electricians and Plumbers, Hawaii Department of Commerce and Consumer Affairs (Professional and Vocational Licensing Division). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Hawaii.
• Verify a license. Hawaii professional and vocational license search Shows: Every license issued by the DCCA Professional and Vocational Licensing Division, including Board of Electricians and Plumbers licenses (journey worker plumber, prefix PJ; master plumber, prefix PM) and the C-37 plumbing contractor classification issued by the Contractors License Board, with license date, expiration date, status and disciplinary action. Honolulu, Hilo and Kailua issue no separate plumber license. Search: Use the 'License #' tab to enter one or more license numbers separated by commas (for example PJ-12345 or PM-1234), or the 'Business/Individual' tab to search by name; a 'License Type Codes' button lists the prefixes. Check both the worker's PJ or PM license and the company's contractor license (prefix CT) with the C-37 classification.

Checked against the official source, September 2026: mypvl.dcca.hawaii.gov.

• Who licenses. Idaho State Plumbing Board, Division of Occupational and Professional Licenses (DOPL). Plumbing licenses are issued at the state level. How licensing works in Idaho.
• Verify a license. The authority's online license register could not be confirmed for this table when it was checked (September 2026), so no link is given here; confirm the license with the authority named above until this row is updated.

• Who licenses. Illinois Department of Public Health (IDPH). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Illinois.
• Verify a license. Illinois Department of Public Health plumber license search Shows: Illinois Department of Public Health plumbing credentials: plumber licenses (numbers beginning with 058), plumber's apprentice licenses (056) and plumbing contractor registrations (055), issued under the Illinois Plumbing License Law. Only current, active licenses appear; expired or inactive ones are not shown, and Chicago licenses plumbers separately. Search: Enter a last name, business name, license ID, street, city, state or county; a wildcard search needs at least the first three letters followed by an asterisk (And*). Search the business name to confirm the 055 plumbing contractor registration and the last name to confirm the individual 058 plumber license.
• City licensing.
  • Chicago: Chicago Department of Buildings plumbing contractor list (webapps1.chicago.gov). Department of Buildings list of active plumbing contractors only (number, name, address, expiration); Chicago also licenses plumbers and apprentices itself, and state-registered contractors still need the city license.

Checked against the official source, September 2026: ildohplmprod.glsuite.us.

• Who licenses. Indiana Plumbing Commission, Indiana Professional Licensing Agency (PLA). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Indiana.
• Verify a license. Indiana Professional Licensing Agency license search Shows: The Indiana Professional Licensing Agency search covers all Indiana professional license holders, including Indiana Plumbing Commission credentials: Plumbing Apprentice, Journeyman Plumber, Plumbing Contractor, Temporary Plumbing Contractor, Plumbing Corporation and Plumbing Apprenticeship School. The agency describes it as an original source that is updated in real time. Search: The statewide link opens the agency's eVerification search, where you search by name, license number, business or profession. Check the Plumbing Contractor license for the company or person contracting the job and the Journeyman Plumber license for the worker; Indianapolis also requires its own city plumbing contractor license.
• City licensing.
  • Indianapolis: Indianapolis current plumbing contractor list (www.indy.gov). City list of current plumbing contractors with a Citizen Access Portal link; Indianapolis licenses plumbing contractors on top of the state license; Lawrence, Speedway, Beech Grove and Southport license separately.

Checked against the official source, September 2026: www.in.gov.

• Who licenses. Iowa Plumbing and Mechanical Systems Board, Iowa Department of Inspections, Appeals, and Licensing (DIAL). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Iowa.
• Verify a license. Iowa Department of Inspections, Appeals, and Licensing license search Shows: The Iowa Department of Inspections, Appeals, and Licensing portal's Plumbing and Mechanical Systems program lists board licenses at apprentice, journey, master and contractor level in plumbing, HVAC, hydronic, refrigeration and sheet metal, plus plumbing temporary licenses. Iowa Workforce Development's contractor registration is a separate search, and Des Moines, Cedar Rapids and Davenport do not license plumbers separately. Search: Enter a license number, business name (Facility), first or last name, or filter by Program (choose 'Plumbing and Mechanical Systems'), Program Detail for the license type, Status, Classification, City or County; end a value with % as a wildcard. Check the contractor license for the business and the journey or master license for the individual.

Checked against the official source, September 2026: amanda-portal.idph.state.ia.us.

• Who licenses. City and county authorities (e.g., Wichita/Sedgwick County MABCD, Johnson County); no statewide plumber license in Kansas. Licensing is municipal, so check the city or county register for the job address. How licensing works in Kansas.
• Statewide register. None for plumbers. Cities and counties set licensing requirements for construction businesses, and each jurisdiction's credential is separate (a Wichita area license from the Metropolitan Area Building and Construction Department does not cover Johnson County and vice versa), so verify with the authority for the address where the work is done. The statewide link is the state business portal's guide to construction licensing. What to check: Identify the city or county where the work is done and use that jurisdiction's contractor license lookup. Verify both the local plumbing contractor license of the business and, where the jurisdiction issues them, the master or journeyman trade certificate of the individual.
• City licensing.
  • Wichita: Metropolitan Area Building and Construction Department contractor lookup (page not confirmed, so no link is given). The department licenses contractors for Wichita and unincorporated Sedgwick County and issues master and journeyman trade certificates; its lookup takes a license number or applicant name, or ask the department by phone.
  • Overland Park: Johnson County contractor licensing page (www.jocogov.org). Overland Park issues no contractor licenses; plumbing contractors hold a Johnson County Class DP (Plumbing) license, searchable through the county's contractor search.
  • Kansas City: Wyandotte County trade licensing page (www.wycokck.org). Wyandotte County Unified Government licenses master plumbing contractors, master plumbers and employee plumbers; its trade licensing page has no lookup, so search the county's Accela Citizen Access portal or ask Building Inspection by phone.

Checked against the official source, September 2026: ksbiz.kansas.gov.

• Who licenses. Division of Plumbing, Kentucky Department of Housing, Buildings and Construction (Public Protection Cabinet). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Kentucky.
• Verify a license. Kentucky Housing, Buildings and Construction license search Shows: Licenses issued by the Kentucky Department of Housing, Buildings and Construction: under the professional trade 'Division of Plumbing' the license types are 'Journeyman Plumber' and 'Master Plumber', and the same form covers HVAC, electrical, fire protection, building inspector and manufactured housing credentials. Kentucky has no separate plumbing contractor license: the master plumber license is the credential a business works under. Search: Enter all or part of the professional trade, license type, name, license number or status and press Search; for an active license the result shows the license number with its issue and expiration dates. Check the master plumber named by the company and the journeyman on site; Louisville, Lexington and Bowling Green do not license plumbers separately.

Checked against the official source, September 2026: dhbc.ky.gov.

• Who licenses. State Plumbing Board of Louisiana. Plumbing licenses are issued at the state level. How licensing works in Louisiana.
• Verify a license. The authority's online license register could not be confirmed for this table when it was checked (September 2026), so no link is given here; confirm the license with the authority named above until this row is updated.

• Who licenses. Plumbers' Examining Board, Office of Professional and Occupational Regulation. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Maine.
• Verify a license. Maine Plumbers' Examining Board license search Shows: All licenses, registrations and permits managed by Maine's Office of Professional and Occupational Regulation, with the Plumbers' Examining Board preselected; the board's individual licenses are Master Plumber, Journeyman Plumber, Journeyman-in-Training and Trainee Plumber. Results show current status, granted authorities, contact information and license or disciplinary actions. Search: Choose 'Search Individuals' and enter a name or license number; a separate 'Search Disciplinary Actions' covers sanctions. Maine licenses individual plumbers only, with no plumbing contractor or business license, so verify the master plumber personally responsible for the job rather than the company name.

Checked against the official source, September 2026: www.pfr.maine.gov.

• Who licenses. Maryland Board of Plumbing, Division of Occupational and Professional Licensing, Maryland Department of Labor. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Maryland.
• Verify a license. Maryland Board of Plumbing public query Shows: Active license holders of the Maryland Board of Plumbing, which licenses master, journeyman and apprentice plumbers and issues natural gas fitter licenses and propane certificates to non-plumbers. Baltimore County and the Washington Suburban Sanitary Committee areas of Prince George's and Montgomery Counties run their own plumber licensing, so a plumber working only there may not appear. Search: Search by name (last name, optionally city), by location (city or ZIP code) or by license number. Results show active license holders only; disciplinary history is not displayed, and the page says to contact the Board for it.
• City licensing.
  • Baltimore: Baltimore City permits page (dhcd.baltimorecity.gov). Baltimore City issues no plumbing license of its own; the state license applies, and the city only requires the contractor to be registered in ePermits before being named on a permit.

Checked against the official source, September 2026: www.dllr.state.md.us.

• Who licenses. Board of State Examiners of Plumbers and Gas Fitters (Massachusetts Division of Occupational Licensure). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Massachusetts.
• Verify a license. Massachusetts Division of Occupational Licensure license search Shows: Licenses of the Division of Occupational Licensure boards on the eLIPSE platform, including the Board of State Examiners of Plumbers and Gas Fitters: master and journeyman plumber, master and journeyman gas fitter, apprentice, LP gas installer, and plumbing and gas business certificates. Boston and other cities issue no separate plumbing license. Search: Pick the Individual or Business tab, then enter any combination of first or last name, city, state, ZIP, Board, License Type and License Number; no MyMassGov account is needed. Results may not reflect all prior discipline, which the division lists separately. If the older ePlace check tool opens instead, it no longer lists plumbers and gas fitters; use this search.

Checked against the official source, September 2026: occupationallicensingandpermitting.mass.gov.

• Who licenses. Michigan Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes, Licensing Section. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Michigan.
• Verify a license. Michigan Bureau of Construction Codes license search Shows: Bureau of Construction Codes license holders; the License Type list includes Plumbing Contractor, Plumbing Master, Plumbing Journey, Plumbing Apprentice and Plumbing Affidavit, plus mechanical contractor, electrical, residential builder, boiler and elevator credentials. Michigan licenses both the plumbing contractor (the business that pulls permits) and the individual master and journey plumbers. Search: Enter any one of Name, Business Name, License Type, License Number, or City and State. Check that the company holds a Plumbing Contractor license and that its qualifying master appears as 'Plumbing Master'; disciplinary action reports for skilled trades are published separately by the Bureau's Enforcement Section.
• City licensing.
  • Detroit: Detroit plumbing permit and certification page (detroitmi.gov). Detroit registers only plumbing contractors that already hold a state license; there is no separate city plumber license, so use the statewide search.

Checked against the official source, September 2026: aca-prod.accela.com.

• Who licenses. Minnesota Department of Labor and Industry (DLI). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Minnesota.
• Verify a license. Minnesota Department of Labor and Industry license lookup Shows: All licenses, bonds, certifications and registrations issued by the Department of Labor and Industry's Construction Codes and Licensing Division, including plumbing (master, journeyworker, restricted plumber, plumbing contractor and plumbing bond holders), mechanical, electrical, residential contractor and water conditioning credentials. The page also offers a nightly downloadable plumbing spreadsheet. Search: From the lookup page open the iMS system, choose 'Continue as Guest', then enter a complete license or registration number or search license and registration holders by name, business or other criteria; no account is needed, and active credentials show the status 'Issued'. Verify both the plumbing contractor (the business, with its bond) and the individual master or journeyworker.
• City licensing.
  • Minneapolis: Minneapolis plumbing contractor list (www.minneapolismn.gov). Minneapolis separately licenses plumbing contractors for sewer and water connections and lists the companies approved for plumbing work in the city; check it alongside the state license.

Checked against the official source, September 2026: www.dli.mn.gov.

• Who licenses. Mississippi State Board of Contractors (MSBOC) for contractor licenses above dollar thresholds; no statewide journeyman/master plumber license, since individual trade licensing is left to local jurisdictions. The state issues its license and some cities license separately; check the statewide register first, then the city where the work happens. How licensing works in Mississippi.
• Verify a license. Mississippi State Board of Contractors contractor search Shows: Mississippi State Board of Contractors licenses only: commercial licenses (plumbing is a specialty under the Mechanical major classification) and residential licenses with the Residential Plumbing classification. Journeyman and master plumbers, which Mississippi leaves to local jurisdictions, are not listed. Search: The statewide link opens the board's Consumers page, whose 'Search Contractors' tool takes the contractor's name or numeric license number and shows status, expiration and classification. A state license is required only above dollar thresholds for residential and commercial work, so a legitimate small-job plumber may not appear; check the city license instead.
• City licensing.
  • Jackson: Jackson building permits page (jacksonms.gov). Plumbing permits are issued by the Building Permit Division to license holders only; no online plumber lookup exists, so ask the division by phone or use the permit portal.
  • Gulfport: Gulfport Building Code Services page (www.gulfport-ms.gov). The city plumbing board issues a master plumber certificate of competency; all plumbing work must be supervised by a qualified master plumber. No online list; confirm with Building Code Services.
  • Southaven: Southaven Building Department FAQ (southaven.org). Trade permit applicants must show an active Mississippi state contractor's license and register as a contractor with the city; no online list, so ask the Building Department by phone.

Checked against the official source, September 2026: www.msboc.us.

• Who licenses. City and county authorities (local plumbing boards of examiners); no statewide plumber license (Missouri regulates plumbing under RSMo Chapter 341 through local certification, not a state board). Licensing is municipal, so check the city or county register for the job address. How licensing works in Missouri.
• Statewide register. None for plumbers. Missouri licenses plumbers only at city or county level, so ask which local jurisdiction issued the plumber's certificate and check with that city or county; St. Louis County, separate from the city, publishes its own master plumber list. The statewide link opens Section 341.010 of the Revised Statutes of Missouri, which sets the certificate requirement. What to check: Use the lookup of the city or county where the work is done. Kansas City and Springfield license businesses through a contractor license and individuals through certificates of qualification or trade certifications, so check both the company and the master plumber.
• City licensing.
  • Kansas City: Kansas City contractor search (page not confirmed, so no link is given). Kansas City issues Journeyman and Master Plumber Certificates of Qualification and a business Contractor License through CompassKC; the city's contractor search covers its contractor license holders, so check both the company and the master plumber.
  • St. Louis: St. Louis Board of Examiners for Plumbers and Drainlayers (page not confirmed, so no link is given). The city's Board of Examiners for Plumbers and Drainlayers issues plumber certificates; plumbing permits go to city-certified plumbing contractors. No public online roster; verify with the Building Division, Room 425, City Hall.
  • Springfield: Springfield contractor license confirmation page (www.springfieldmo.gov). The city advises hiring contractors that hold the required city license; confirm through the online Business License Search, and individual master or journeyman trade certifications come from Building Development Services.

Checked against the official source, September 2026: revisor.mo.gov.

• Who licenses. Montana Board of Plumbers (Montana Department of Labor & Industry). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Montana.
• Verify a license. Montana Department of Labor and Industry license lookup Shows: Licenses of all Montana Department of Labor and Industry boards and programs, including the Board of Plumbers (master plumber, journeyman plumber, medical gas endorsement) and the Construction Contractor Program registration. Montana licenses individual plumbers; a plumbing company with employees must also hold a construction contractor registration. Search: On the License Search tab, under Licensing Board/Program choose 'Board of Plumbers', optionally a license type, then search by name or license number; the company's construction contractor registration is searchable in the same tool under 'Construction Contractor Program'. The Board of Plumbers also accepts emailed or mailed verification requests.

Checked against the official source, September 2026: ebizws.mt.gov.

• Who licenses. City plumbing boards and building departments (e.g., City of Omaha Planning Department/Plumbing Board, City of Lincoln Building & Safety); no statewide plumber license (the state requires only contractor registration with the Nebraska Department of Labor). Licensing is municipal, so check the city or county register for the job address. How licensing works in Nebraska.
• Statewide register. None for plumbers. Plumber licensing in Nebraska is municipal: cities license master, journeyman and apprentice plumbers. The Department of Labor's contractor registration search confirms only that a business is registered under the Contractor Registration Act; in the department's own words, registration is a requirement but does not ensure quality of work or protect against fraud. What to check: Check the plumber's city license first (see the city licensing entries below), then confirm the business appears as a registered contractor by searching the Department of Labor roster by business name. Registration is administrative and is not proof of plumbing qualification.
• City licensing.
  • Omaha: Omaha license search (Accela Citizen Access) (aca-prod.accela.com). Search by license number, name or business name; types include Plumbing License, Master Plumber Exam, Journeyman Plumber Exam and Apprentice Plumber Board Approval.
  • Lincoln: Lincoln Building and Safety plumbing page (www.lincoln.ne.gov). Building and Safety publishes a downloadable spreadsheet of registered Master Contractor, Master, Journeyman and Apprentice plumbers; there is no interactive search.
  • Bellevue: Bellevue Permits and Inspections Department page (www.bellevue.net). The department's page carries no online plumber list; ask the Permits and Inspections Department to confirm a plumber's license.

Statewide page not confirmed when this table was checked, September 2026; city links as listed.

• Who licenses. Nevada State Contractors Board. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Nevada.
• Verify a license. Nevada State Contractors Board license search Shows: Nevada contractor licenses in every classification, including C-1 Plumbing and Heating Contracting; each result shows the license number, classification, status, principals and qualified individual, and information may not reflect recent changes. Individual journeyman and apprentice plumbers are not listed: Nevada licenses only the contracting company, and journeyman plumber cards in the Las Vegas area are a Clark County program. Search: Choose an option in the 'Search By' menu: license number, company name, or principal or qualified individual name; partial names and wildcards work from 2 characters. This verifies the business, not the worker: ask for the company's license number, confirm the status is Active, match the C-1 classification to the work and check the monetary limit fits the job.

Checked against the official source, September 2026: app.nvcontractorsboard.com.

• Who licenses. Mechanical Licensing Board, New Hampshire Office of Professional Licensure and Certification (OPLC), formerly named the Mechanical Safety and Licensing Board. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in New Hampshire.
• Verify a license. New Hampshire OPLC license verification Shows: All licenses issued by the OPLC; under the profession Mechanical, the types include Master Plumber, Journeyman Plumber, Apprentice Plumber and the Gas Fitter licenses. New Hampshire licenses plumbers as individuals with no separate plumbing contractor license; gas piping work needs a separate Gas Fitter license shown in the same search. Search: In 'Person Search', pick the profession Mechanical and a license type such as Master Plumber or Journeyman Plumber, then optionally narrow by name or license number; a few letters of the name are enough. A 'Business Search' exists, but plumbing licenses go to individuals, so search for the master plumber responsible for the job.

Checked against the official source, September 2026: forms.nh.gov.

• Who licenses. New Jersey State Board of Examiners of Master Plumbers (Division of Consumer Affairs, Department of Law and Public Safety). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in New Jersey.
• Verify a license. New Jersey Consumer Affairs license verification Shows: All Division of Consumer Affairs professional licenses; the profession list includes Master Plumbers, and a person search returns the master plumber's name, license number, status and expiration. New Jersey licenses master plumbers only; journeymen and apprentices work under a master plumber and do not appear, and a Home Improvement Contractor registration is not a plumbing license. Search: Select Master Plumbers as the profession, optionally a licensee type, then enter any combination of first name, last name, license number and city, with at least two characters in each field used. Ask the plumber for the master plumber license number that must appear on contracts, vehicles and advertising; master plumbers renew every two years.

Checked against the official source, September 2026: newjersey.mylicense.com.

• Who licenses. Construction Industries Division (CID), New Mexico Regulation and Licensing Department. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in New Mexico.
• Verify a license. New Mexico Construction Industries Division license search Shows: Construction Industries Division contractor licenses, which belong to the business and are backed by a qualifying party, including plumbing classifications such as MM-98, plus individual certificates for qualifying parties and journeyman plumbers. Albuquerque, Las Cruces and Rio Rancho add no city plumbing license. Search: Use Search Company (type Contractor) for the business: license number or business name (at least the first word, minimum 3 characters), city or zip. Use Search Individual for the plumber: certificate number, first or last name, city, zip. A CAPTCHA is required; PSI, the state licensing vendor, hosts the search for the Regulation and Licensing Department.

Checked against the official source, September 2026: public.psiexams.com.

• Who licenses. Local governments, meaning city and county plumbing boards (e.g., the NYC Department of Buildings); no statewide plumber license. Licensing is municipal, so check the city or county register for the job address. How licensing works in New York.
• Statewide register. None for plumbers. Plumbing licensing is municipal: in New York City only master plumbers holding a city license and their employees may perform plumbing work; outside the city it varies by city and county, and some towns require none. The link opens the state Business Express guide for plumbing contractors, which refers homeowners to the local plumbing board. What to check: There is nothing to search at state level. Identify the city or county plumbing board for the job address and use its list or lookup (see the city licensing entries below); the Department of State license search covers real estate, cosmetology and similar trades, not plumbers.
• City licensing.
  • New York City: New York City Department of Buildings license status check (www.nyc.gov). Department of Buildings page that links the Skilled Trades license search; the department's DOB NOW Licensee tool also finds master and journeyman plumbers by last name, business name or license number.
  • Buffalo: Buffalo open data plumber license dataset (data.buffalony.gov). OpenData Buffalo dataset of contractor licenses for journeyman and master plumbers from Permit and Inspection Services, with status, expiration date, business name and applicant columns.
  • Rochester: Rochester Examining Board of Plumbers page (page not confirmed, so no link is given). The city's Examining Board of Plumbers licenses master plumbers; the city publishes a PDF roster of active plumbing license holders (name, license type, expiration date).

Checked against the official source, September 2026: www.businessexpress.ny.gov.

• Who licenses. State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in North Carolina.
• Verify a license. North Carolina plumbing, heating and fire sprinkler board search Shows: Every license of the State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors, selectable by classification type: plumbing contractor classes (Plumbing Class I and Class II, restricted and limited plumbing), plumbing technician, fuel piping, heating and fire sprinkler contractor and technician licenses. North Carolina has no journeyman license. Charlotte, Raleigh and Greensboro issue no city plumbing license. Search: Pick a classification type or enter a license number, company name, first and last name, phone, address, city, state or zip; at least one field is required. The contractor license goes to an individual qualifier and lists the company, so match both the person's license and the business name.

Checked against the official source, September 2026: public.nclicensing.org.

• Who licenses. North Dakota State Plumbing Board. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in North Dakota.
• Verify a license. North Dakota State Plumbing Board license search Shows: Active North Dakota State Plumbing Board licenses: Master Plumber, Journeyman Plumber, Apprentice, Sewer and Water, Water Conditioning, and Backflow (certified backflow assembly tester). Fargo, Bismarck and Grand Forks issue no separate plumbing license; city permits are pulled under the state license. Search: Search by name, license number, license type or city. North Dakota licenses individuals, and a plumbing business must be run by a master plumber who holds a license, so verify the master and any journeyman who works on site; for further information, contact the Board office by phone.

Checked against the official source, September 2026: members.ndplumbingboard.gov.

• Who licenses. Ohio Construction Industry Licensing Board (OCILB), Ohio Department of Commerce, Division of Industrial Compliance. The state issues its license and some cities license separately; check the statewide register first, then the city where the work happens. How licensing works in Ohio.
• Verify a license. Ohio OCILB eLicense Center lookup Shows: Ohio Construction Industry Licensing Board contractor licenses by license type: plumbing contractors (PL), plus electrical, HVAC, hydronics, refrigeration and training agencies. The license is held by an individual plumbing contractor who must be the qualifying person for the company; the state issues no journeyman plumber license, so journeymen do not appear. Search: Select the PL plumbing contractor license type and enter a credential number, name, state or county; 'Lookup Licensee by Employer' finds the company behind an individual license holder. The state license covers commercial work and, where a city requires it, residential work; verify the OCILB PL license, then the city registration in Columbus, Cleveland or Cincinnati.
• City licensing.
  • Columbus: Columbus Accela Citizen Access license search (portal.columbus.gov). Licenses module: search by application number, license type such as Plumbing Contractor, city or state license number, name or business; Columbus also licenses Journeyperson Plumbers separately.
  • Cleveland: Cleveland active contractor registrations dataset (data.clevelandohio.gov). Open data list of active contractor registrations in the Building and Housing permitting system; plumbing contractors must hold the state license before registering, and registration can be confirmed by phone with Building and Housing.
  • Cincinnati: Cincinnati registered contractor search (page not confirmed, so no link is given). Registered contractor search: enter the contractor's name or search by contractor type; the city's Board of Examiners of Plumbers licenses journeymen separately.

Checked against the official source, September 2026: elicense4.com.ohio.gov.

• Who licenses. Oklahoma Construction Industries Board (CIB). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Oklahoma.
• Verify a license. Oklahoma CIB consumer page for license checks Shows: CIB license holders in plumbing, electrical, mechanical, and building and home inspection; for plumbing, the Plumbing Contractor and Journeyman Plumber licenses and apprentice registrations (roofing contractors have a separate search). The contractor license, not a journeyman license, is what allows a plumbing business to contract and pull permits. Search: On the CIB consumer page, click 'Search Building & Home Inspectors, Electrical, Mechanical, and Plumbing Licensees', which opens the CIB licensee search; search by name, license number or business and check that the classification matches. Oklahoma City also requires plumbing contractors to register the state license with the city's Supervisor of Licenses and carry a city certificate of registration.

Checked against the official source, September 2026: oklahoma.gov.

• Who licenses. Building Codes Division (BCD), Oregon Department of Consumer and Business Services. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Oregon.
• Verify a license. Oregon Building Codes Division license holder search Shows: Building Codes Division (BCD) license holders: business contractor licenses including the plumbing contractor license, individual licenses including journeyman plumber and apprentice, and inspector certifications. A plumbing business must also hold a Construction Contractors Board (CCB) license, covering registration, bond and insurance; Portland, Salem and Eugene issue no plumber licenses of their own. Search: Search by business name, individual name or license number (any part of the name works; a checkbox adds expired and inactive licenses), or by profession and location. Confirm the plumbing contractor business license and the journeyman plumber license of the person on the job, then check the CCB license in the Construction Contractors Board's own search.

Checked against the official source, September 2026: www4.cbs.state.or.us.

• Who licenses. Municipal authorities (e.g., Philadelphia Department of Licenses and Inspections, Allegheny County); no statewide plumber license (home improvement contractors register with the Pennsylvania Office of Attorney General). Licensing is municipal, so check the city or county register for the job address. How licensing works in Pennsylvania.
• Statewide register. None for plumbers. Plumbing licenses come from individual municipalities, and the state keeps no list of which ones require them. The link opens the Department of Labor and Industry's explanation of contractor licensing. Home improvement contractors register with the Office of Attorney General, but that registration only shows the business filed paperwork and carries minimum insurance and says nothing about plumbing competence. What to check: There is nothing to search statewide. Look up the municipality's plumber license where the property is (Philadelphia Licenses and Inspections, Allegheny County Health Department for Pittsburgh, the City of Allentown), then the Attorney General's Home Improvement Contractor registration search, which takes a registration number, business name, city, county or phone.
• City licensing.
  • Philadelphia: Philadelphia Licenses and Inspections contractor lookup (li.phila.gov). Filter by plumber type (master, journeyman, apprentice); shows license number, dates and violations. Only a master plumber can be named on a plumbing permit.
  • Pittsburgh: Allegheny County Health Department Plumbing Program licensing page (www.alleghenycounty.us). Issues apprentice, journeyman and master plumber licenses for Pittsburgh; only a registered master plumber may pull plumbing permits. No online search; verify by phone with the Plumbing Program.
  • Allentown: Allentown Building Standards and Safety trades licensing page (page not confirmed, so no link is given). Bureau of Building Standards and Safety issues journeyman and master plumber licenses by city exam; verify a license by phone with the bureau.

Checked against the official source, September 2026: www.pa.gov.

• Who licenses. Rhode Island Department of Labor and Training, Division of Professional Regulation (Board of Examiners of Plumbers). Plumbing licenses are issued at the state level. How licensing works in Rhode Island.
• Verify a license. The authority's online license register could not be confirmed for this table when it was checked (September 2026), so no link is given here; confirm the license with the authority named above until this row is updated.

• Who licenses. South Carolina Department of Labor, Licensing and Regulation (Residential Builders Commission for residential plumbers; Contractor's Licensing Board for commercial mechanical/plumbing contractors). Plumbing licenses are issued at the state level. How licensing works in South Carolina.
• Verify a license. The authority's online license register could not be confirmed for this table when it was checked (September 2026), so no link is given here; confirm the license with the authority named above until this row is updated.

• Who licenses. South Dakota State Plumbing Commission (Department of Labor and Regulation). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in South Dakota.
• Verify a license. South Dakota Plumbing Commission license lists (PDF) Shows: The Commission publishes PDF lists rather than a search form: a plumber list (Plumbing Contractor, Plumber, Journeyman Plumber and Apprentice Plumber, sorted by city), a specialty list (sewer and water, appliance, water conditioning, underground irrigation, manufactured home contractors and installers) and an onsite wastewater installer list. Sioux Falls, Rapid City and Aberdeen issue no separate plumber licenses. Search: On the Consumer Information page, open the plumber list PDF and search it by last name or scan by city; the business must hold a Plumbing Contractor license and the worker a Plumber (journeyman level) or higher license. The list is a snapshot and licenses expire December 31 each year, so confirm current status by phone with the Commission.

Checked against the official source, September 2026: dlr.sd.gov.

• Who licenses. Tennessee Board for Licensing Contractors (Department of Commerce & Insurance); trade-level plumber licenses also issued by some counties and municipalities. The state issues its license and some cities license separately; check the statewide register first, then the city where the work happens. How licensing works in Tennessee.
• Verify a license. Tennessee Verify public license search Shows: Department of Commerce and Insurance credentials, including those of the Board for Licensing Contractors: contractor licenses (plumbing falls under the mechanical CMC-A and CMC classifications for larger projects), and the limited plumber (LLP) and limited electrician (LLE) licenses. Master and journeyman plumber certificates are issued locally by Nashville, Memphis, Knoxville and others, not by the state. Search: Search by individual or business name or license number; results show status, expiration and public disciplinary actions. A plumber may hold a state contractor license (larger projects), a state LLP (smaller projects where the Division of Fire Prevention handles permits or inspections) or a local master or journeyman certificate, so check with the local government about its licensing requirement.
• City licensing.
  • Nashville: Metro Nashville ePermits license search (epermits.nashville.gov). Choose the License search and search by contractor to see trade contractor licenses and Metro master and journeyman plumber registrations; only Metro-registered contractors can pull plumbing permits.
  • Memphis: Develop901 portal license search (Memphis and Shelby County) (aca-prod.accela.com). Office of Construction Code Enforcement portal: in the Licenses module, search Plumbing License Registration by professional name, trade name or number.
  • Knoxville: Knoxville Plans Review and Inspections permit registration page (permits.knoxvilletn.gov). Plans Review and Inspections issues its own Plumbing Installer license (formerly Master Plumber) and Plumbing Contractor registration; the page explains permit registration and has no license search, so confirm license status by phone with Plans Review and Inspections.

Checked against the official source, September 2026: verify.tn.gov.

• Who licenses. Texas State Board of Plumbing Examiners (TSBPE). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Texas.
• Verify a license. TSBPE public license search Shows: Every Texas State Board of Plumbing Examiners license and registration: Responsible Master Plumber, Master Plumber, Journeyman Plumber, Tradesman Plumber-Limited, Plumbing Inspector, Plumber's Apprentice registration, Drain Cleaner and Drain Cleaner-Restricted, Residential Utilities Installer, plus endorsements such as medical gas piping. Texas licenses individual plumbers, not companies; a plumbing business must be run by a Responsible Master Plumber. Search: Choose a search by name, name within a license type, license number, city or county; select 'Texas State Board of Plumbing Examiners' as the board and the plumbing license type option, then complete the CAPTCHA, entering license numbers as digits only, without the rank letter. Results show status, expiration, endorsements, insurance certificate status, discipline and continuing education history.

Checked against the official source, September 2026: vo.licensing.hpc.texas.gov.

• Who licenses. Utah Division of Professional Licensing (DOPL), Utah Department of Commerce. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Utah.
• Verify a license. Utah DOPL license lookup and verification Shows: All Utah DOPL licenses across 64 profession categories, with a plumber category listing Apprentice Plumber, Journeyman Plumber, Master Plumber, Residential Journeyman Plumber and Residential Master Plumber, and a contractor category that includes the plumbing contractor classifications a plumbing business must hold. Salt Lake City, West Valley City and Provo issue no trade licenses. Search: Search by name (begins with or contains), by license number (the core number shows all licenses held, core number plus a four-digit identifier shows one license) or by profession, with a CAPTCHA. Check both the individual plumber (journeyman or master) and the company's DOPL contractor license (plumbing classification); a residential-only plumber may not work on commercial jobs.

Checked against the official source, September 2026: secure.utah.gov.

• Who licenses. Vermont Division of Fire Safety, Department of Public Safety. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Vermont.
• Verify a license. Vermont Division of Fire Safety plumber roster Shows: Active Vermont plumbing licenses issued by the Division of Fire Safety, published as an open dataset rather than a search form: master, journeyman and special (specialty licenses such as water heater, heating system and water treatment specialists), with columns for name, address, city, license number, expiration date, type and level. Vermont licenses individuals; there is no separate plumbing contractor license. Search: Type a last name, first name, city or license number into the search box in the upper right of the dataset page, or filter the table, and confirm the expiration date is in the future. Verify the person doing the work, since the license belongs to the individual.

Checked against the official source, September 2026: data.vermont.gov.

• Who licenses. Virginia Board for Contractors (Tradesmen program), Department of Professional and Occupational Regulation (DPOR). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Virginia.
• Verify a license. Virginia DPOR license lookup Shows: Every license holder regulated by the Department of Professional and Occupational Regulation, including Tradesmen Program individual licenses (journeyman or master plumbers, gas fitters and other trades) and Board for Contractors business licenses (Class A, B and C contractors with the PLB plumbing specialty). Results show license status, expiration, disciplinary actions and, for tradesmen, continuing education hours needed to renew. Search: Type a name, license number, address or license type into the search box; an Advanced License Search and a Disciplinary Action Search are offered too. The individual plumber holds a Tradesman license (journeyman or master plumber) while the contracting business holds a Board for Contractors license, so check both; data is refreshed nightly.

Checked against the official source, September 2026: www.dpor.virginia.gov.

• Who licenses. Washington State Department of Labor & Industries (Plumber Certification Program). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Washington.
• Verify a license. Washington L&I contractor and tradesperson verification Shows: Washington L&I contractor registrations (general and specialty, including plumbing contractors) and plumber certificates (Journey Level PL01, Residential PL02, Residential Service PL04, specialty and trainee), alongside other trade credentials; results also show workers' comp account status, safety and construction citations and bond lawsuits. Search: Search by full or partial business, owner or tradesperson name, contractor or tradesperson license or certificate number, L&I account ID, or WA UBI number. The business must hold an active contractor registration and the individual doing the plumbing must hold a plumber certificate, so verify both; plumber certificates appear on the tradesperson side of the results.

Checked against the official source, September 2026: secure.lni.wa.gov.

• Who licenses. DC Department of Licensing and Consumer Protection (DLCP), Board of Industrial Trades; construction permits are issued by the DC Department of Buildings (DOB). Plumbing licenses are issued by the District; the register below covers all of DC. How licensing works in Washington, D.C.
• Verify a license. DC DLCP occupational and professional license search Shows: All DLCP occupational and professional licensing credentials; under the Industrial Trades discipline (Board of Industrial Trades) the plumbing categories are Plumber Apprentice, Plumber Contractor, Plumber Journeyman and Plumber Master, plus the combined Plumber/Gasfitter and the Gasfitter categories at the same levels. The Plumber Contractor license is in this search; the District's separate business license is looked up elsewhere. Search: Enter a license number or licensee name, or filter by license status (active, inactive, expired, revoked, suspended), discipline (choose Industrial Trades), license type and date range; no account is needed on the public search page, although the portal home page asks for a sign-in. Check both the individual master or journeyman plumber and the business's Plumber Contractor license.

Checked against the official source, September 2026: govservices.dcra.dc.gov.

• Who licenses. West Virginia Division of Labor. Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in West Virginia.
• Verify a license. West Virginia Division of Labor plumber search Shows: Current certified plumbers of the West Virginia Division of Labor: Master Plumber, Journeyman Plumber and Plumber in Training certifications, all held by individuals. The business doing the job needs a separate state contractor license with a plumbing classification from the Contractor Licensing Board; that license does not appear in this search. Search: Enter a plumber certification number, plumber name or plumber city, or pick a county (all 55 counties plus Out of State). Look up the business's contractor license separately in the Contractor Licensing Board's contractor license search.

Checked against the official source, September 2026: www.wvlabor.com.

• Who licenses. Wisconsin Department of Safety and Professional Services (DSPS). Plumbing licenses are issued at the state level; the register below is the statewide one. How licensing works in Wisconsin.
• Verify a license. Wisconsin DSPS license lookup Shows: All DSPS credentials, including the trades: master plumber, master plumber restricted, journeyman plumber, journeyman plumber restricted, plumbing apprentice and learner registrations, utility contractor and pipelayer, plus HVAC and other trade credentials. Results show credential status, expiration and completed continuing education. Search: Search by name, credential or license number, or profession and credential type. Wisconsin licenses individual plumbers (master and journeyman) statewide; there is no separate state plumbing contractor license, but a plumbing business must be owned by or employ a master plumber and register as a plumbing business.

Checked against the official source, September 2026: license.wi.gov.

• Who licenses. City and county building departments (e.g. City of Casper Building Inspection Division, City of Cheyenne Compliance Department); Wyoming has no statewide plumber license (the state licenses only electricians). Licensing is municipal, so check the city or county register for the job address. How licensing works in Wyoming.
• Statewide register. None for plumbers. Plumbing contractors and master, journeyman and apprentice plumbers get their licenses from each city or county building department. A license from one Wyoming city is not automatically valid in another, so ask the plumber which municipality issued the license and verify there. The link opens the City of Laramie's contractor licensing page, which states the municipal rule in its own words. Consumer complaints about plumbers go to the Wyoming Attorney General's Consumer Protection and Antitrust Unit. What to check: Use the official lookup or list of the city where the work is done. Cities may grant reciprocity to a license from another Wyoming city under the state reciprocity statute, so ask the city for the job address whether it accepts the plumber's license.
• City licensing.
  • Cheyenne: Cheyenne OpenGov permitting and licensing portal (cheyennewy.portal.opengov.com). City OpenGov licensing portal; click 'Search' for contractor licensing. Company licenses pair with an Individual Qualified Supervisor; plumbers hold city licenses only.
  • Casper: Casper Building Inspection Division contractor licensing page (page not confirmed, so no link is given). Building Inspection Division contractor licensing page for plumbing, mechanical and individual contractors; contact the division directly to verify a license. Natrona County publishes a plumbing contractor list for unincorporated areas.
  • Laramie: Laramie contractor list (PDF) (cityoflaramie.org). PDF contractor list with a plumbing contractors section; companies only, not individual master or journeyman plumbers, so ask the building department by phone about those. Licenses expire December 31.

Checked against the official source, September 2026: www.cityoflaramie.org.