Plumbing License Requirements by State
Quick answer: Plumbing contracting is regulated differently across the covered states. Texas uses a Responsible Master Plumber, Florida offers certified or locally grounded registered contractor routes, California licenses the C-36 contractor, Arizona licenses the contracting business through a qualifying party, and North Carolina uses an individual contractor license to qualify a firm. Check the exact scope and local permit office before offering work.
Separate the contractor, qualifier, and permit
The authority to sell plumbing work is not always the credential held by the person on the tools. A business license may need a named qualifier; an individual master may need a separate designation to take responsibility for a company. A city permit is a further job-level approval. Begin with the planned services and business structure, then ask which credential covers each role. The source-linked table provides the official guidances.
Texas: the responsible master is central
The Texas State Board of Plumbing Examiners licenses plumbers statewide. The record identifies no separate plumbing company license: a Master Plumber designated as Responsible Master Plumber supervises the work contracted under that license and obtains permits. The designation is tied to one company at a time. A prospective owner should confirm the master’s eligibility and the business relationship before using the person’s credential in a launch plan. Cities still issue permits and inspect work. See the Texas plumbing page for the designation, insurance, and application details.
Florida: statewide certification or local competency
The Construction Industry Licensing Board oversees plumbing contractors. A Certified Plumbing Contractor credential supports statewide work within its trade scope. A Registered Plumbing Contractor route depends on local competency licensing and is limited to the jurisdictions covered by that local qualification. A business organization may be qualified by the certificate holder. Journeyman licensing is local rather than a statewide journeyman program on the official pages. Local business tax and permit requirements remain. The Florida guide distinguishes these paths and their official fee categories.
California: the C-36 scope and entity matter
The Contractors State License Board issues the C-36 Plumbing contractor license to the owner or entity, with a qualifying individual meeting experience and examination requirements. The record describes a narrow casual or minor-work exemption under Business and Professions Code section 7048; do not treat it as a general plumbing business route. Entity type affects initial fees and, for an LLC, additional bond and liability insurance requirements. Local building permits and business licensing are separate. Review the California page before selecting an entity.
Arizona: choose residential, commercial, or dual scope
The Registrar of Contractors licenses the contracting business through a qualifying party. The plumbing classifications distinguish residential, commercial, and dual work. The qualifying party is a role within the license application, not another state trade license from ROC. Bond requirements depend on classification and projected volume; residential and dual applicants also face Recovery Fund assessments in the record. Some older residential subclassifications are closed to new applications. Check current classification details and city permits in the Arizona guide.
North Carolina: contractor class sets the building scope
The State Board of Examiners of Plumbing, Heating & Fire Sprinkler Contractors licenses an individual who qualifies a firm. Plumbing Contractor Class I covers work in broader building types; Class II is confined to detached single-family dwellings. Restricted Limited Plumbing covers specified exterior and related work. A technician license serves a different worker role. Local inspection departments control permits. The North Carolina page explains experience, activation, and renewal from the official guidance.
What to verify before the first bid
Take the proposed service list to the licensing authority. Ask about the qualifier’s relationship to the entity, whether the planned water-heater, gas piping, backflow, excavation, or sewer work sits within the credential, and what documentation the application needs. Then contact the permit office for the job address about plan review, inspections, and any local registration. Confirm insurance and bond wording with the authority and an insurer. A license record is a starting point; it cannot resolve every site or specialty question.
Federal requirements can arise from specific work, such as lead-safe renovation rules when disturbing painted surfaces in covered older housing or facilities. That is a project condition, not a general federal plumbing contractor license. Check the EPA Renovation, Repair and Painting program when the scope includes that disturbance. Employment, tax, and vehicle obligations also depend on how the company operates.
This guide covers Texas, Florida, California, Arizona, North Carolina, Georgia, Tennessee, South Carolina, Ohio, Virginia, Michigan, Washington, Massachusetts, and Minnesota. Other states are not yet covered. Use the startup cost guide to connect the applicable credential route to the launch budget.
Estimated startup cost: $8,700–$10,800 Estimated startup cost: $8,700–$10,800. Break-even at about 7 jobs per month. Monthly overhead: $1,600–$1,750 · Annual operating: $19,300–$21,000 · Break-even: 7 jobs/month Vehicle operating per month: $760 CALCULATED Phone and admin per month: $150 YOUR INPUT Not included in total: Licensing & exam fees, Business formation (state filing). Startup total is the sum of available first-year cost lines. Monthly overhead includes insurance, software, marketing, vehicle operating, phone and admin, and payroll. Break-even jobs = monthly overhead ÷ (average ticket × gross margin).Startup Cost Calculator
Licensing & exam fees Not included OFFICIALLicense cost not listed here — check the state authorityLicense details Business formation (state filing) Not included OFFICIAL Insurance (first year) $1,750 MARKET ESTIMATEGeneral liability Vehicle acquisition $0 YOUR INPUTYour existing vehicle; acquisition cost $0 Vehicle price sources
Tools & equipment $50 MARKET ESTIMATE Starter kit items
Software (first year) $590–$2,250 MARKET ESTIMATEPublished monthly list price × 12 Software price sources
Launch marketing $1,500 YOUR INPUTYour input — default: 3 months × $500 Payroll reserve $0 CALCULATEDBLS median wage × 173 hours/month × employees × employer taxes and ECEC benefits × working-capital months Working capital $4,800–$5,250 CALCULATEDMonthly overhead excluding payroll (shown separately) × working-capital months Permits & compliance $0 YOUR INPUTYour input — default $0; local requirements may apply Show formula
Official sources
- tsbpe.texas.gov — Initial RMP designation application (waived if applied during renewal, when only $300 renewal applies)
- tsbpe.texas.gov — Exam processing fee payable to TSBPE
- leginfo.legislature.ca.gov — Application for original contractor license, one classification (exam or waiver); paid to CSLB
- web.cslb.ca.gov — Active timely renewal, sole owner (includes C-10 $20 statutory surcharge)
- www.cslb.ca.gov — DOJ fingerprint processing fee (Live Scan), per applicant/officer/partner/owner/RME
- roc.az.gov — New license application fee, Specialty Commercial (C)
- nclicensing.org — Examination application fee (non-refundable)
- nclicensing.org — Initial license activation after passing exam (due within 45 days)
- nclicensing.org — Annual renewal, Plumbing/Heating/Fuel Piping contractor license
- www.tn.gov — Initial contractor license
- www.tn.gov — Contractor license renewal
- tn.gov — Tennessee Board for Licensing Contractors, exam information (Prov)
- www.tn.gov — Initial LLP license
- llr.sc.gov — Initial general or mechanical contractor entity license
- llr.sc.gov — RBE application
- codes.ohio.gov — OCILB electrical examination application
- law.lis.virginia.gov — Class C initial contractor license
- law.lis.virginia.gov — Class C contractor license renewal
- law.lis.virginia.gov — Original master tradesman license by examination
- www.dpor.virginia.gov — PSI Master Tradesman examination, paid directly to PSI
- law.lis.virginia.gov — Tradesman license renewal
- www.michigan.gov — Initial Plumbing Contractor license application
- www.michigan.gov — Electrical contractor license, every three years
- www.michigan.gov — Initial Master Plumber license application
- app.leg.wa.gov — Initial plumbing contractor license
- lni.wa.gov — L&I journey-level plumber examination application; testing contractor may charge an additional exam administration fee
- www.mass.gov — New plumbing business license
- www.mass.gov — Corporation or partnership plumbing business renewal
- www.mass.gov — Master Plumber exam/license application
- www.dli.mn.gov — Initial plumbing contractor license
- www.dli.mn.gov — Plumbing contractor renewal, on time
- www.dli.mn.gov — Master plumber exam
- www.dli.mn.gov — Class A master electrician exam
- api.bls.gov — BLS OEWS Plumbers, Pipefitters, and Steamfitters
Market sources
- www.flrules.org — Examination development fee paid to DBPR or its exam vendor upon scheduling tests (part of the $335 application+exam fee)
- test-takers.psiexams.com — PSI electrical trade exam, per registration
- test-takers.psiexams.com — PSI Plumbing Contractor examination, each attempt
- www.homedepot.com — RIDGID 31020 14-in straight pipe wrench
- www.homedepot.com — RIDGID 32925 Model 15 tubing cutter
- www.homedepot.com — RIDGID 57043 Power Spin+ drain auger
- www.lowes.com — Werner PD6206 6-ft fiberglass platform ladder
- www.homedepot.com — 3M SecureFit SF400G-LV-4-PS safety glasses
- www.walmart.com — Milwaukee M18 FORCE LOGIC 2922-20 press tool (ONE-KEY)
- www.walmart.com — Milwaukee 2773-22L M18 Force Logic long throw press tool kit 1/2-1 in.
- www.walmart.com — RIDGID K-400 drum drain cleaning machine
- www.homedepot.com — Klein Tools ET16 borescope camera
- www.insureon.com — Insureon
- www.getjobber.com — Jobber
- www.housecallpro.com — Housecall Pro
- quickbooks.intuit.com — QuickBooks Online
- www.ramtrucks.com — 2026 Ram ProMaster cargo van (base)
- www.cars.com — 2026 Ford F-150 XL (base)
- www.cars.com — 2026 Ford Transit-150 cargo van (base, T-150 130in low roof RWD)
- www.coxautoinc.com — Used vehicle average listing price (all segments, not cargo-van specific)
Frequently asked questions
Is a master's individual license always enough to operate a company?
No. Texas requires the responsible master designation; other states use contractor and qualifier arrangements described above.
Does a state credential replace plumbing permits?
No. Ask the inspection department for the job address about permits and inspections.
Can a Florida registered contractor bid statewide?
The researched registered route is limited to jurisdictions supported by the holder's local competency license.
Are all states covered here?
No. The state table on this page lists every state with a verified record; other states are not yet covered.
Last updated: October 21, 2026