WA · Reviewed 2026-10-06

Washington licensing for homeowners

Board lookups, licence classes, contract rules, and the verification routine — sourced to state law and official registries.

State: Washington
Boards listed: 1
Licence classes: 4

Verify with the board — last reviewed 2026-10-06

Licensing rules change and cities add requirements on top of state law. Use this page as orientation; the lookup links below are the authoritative check before you sign a contract.

Who must be licensed in Washington

Washington requires contractors to register with the Department of Labor & Industries when performing construction services for compensation above the statutory threshold (currently $1,000 or more in a year for most registrants — confirm the current RCW amount). L&I also licenses electrical, plumbing, and HVAC contractors and tracks continuing education. Registration is not optional for legitimate remodeling businesses: unregistered contractors cannot legally collect payment for covered work and face steep penalties. Seattle, Spokane, and other cities add local business licences, but the L&I verification portal is the statewide check homeowners should run first.

Licensing boards and lookups

State licensing authorities for Washington
Authority	Scope	Lookup
Washington L&I — Verify a Contractor 360-902-5220	Contractor registration and electrical, plumbing, and construction trades.	Verify licence →

Licence classes and what they authorize

General contractor registration — L&I contractor registration
Performing construction services for compensation above the registration threshold with bond and insurance on file.
Electrical contractor — Electrical contractor licence
Electrical contracting with certified electricians and administrators per RCW 19.28.
Plumbing contractor — Plumbing contractor licence
Plumbing installation and repair under the plumbing contractor programme.
HVAC / refrigeration — Specialty contractor endorsements
HVAC and related specialty scopes as listed on the L&I record.

Verify a licence in about two minutes

Go to L&I’s Verify a Contractor tool — not a search engine ad.
Enter the contractor registration number or business name and open the detailed record.
Confirm registration status is active, bond and insurance are current, and any specialty endorsements match your job.
For electrical scope, verify the electrical contractor licence and administrator separately if shown.
Check whether your city requires a local business licence in addition to state registration before permits release.

Contractor hiring checklist

Insurance and bond minimums

Washington contractors must file a surety bond and liability insurance with L&I as a condition of registration. Amounts are set by rule and can change — the verification portal shows what is on file today. Trade licences carry their own insurance requirements. Always get COI from the insurer.

Who issues permits

Cities and counties issue building permits under the Washington State Building Code. Energy code and seismic categories vary on the west slope versus eastern Washington. L&I electrical and plumbing permits may run in parallel with local building permits depending on scope.

Homeowner permits — can you pull one, and should you

Owner-occupiers may obtain owner-builder permits in many jurisdictions if they perform work themselves or hire registered contractors. You cannot use an owner permit to hire an unregistered bidder. Remote rural counties and urban Seattle have different inspection backlogs — plan schedule accordingly.

Deposits, cancellation rights, and liens

Deposit rules: Washington’s contractor registration law requires a written disclosure statement and clear identification of the contractor registration number on contracts and ads. While there is no single statewide deposit percentage, the Home Solicitation Sales Act and Consumer Protection Act restrict unfair practices.
Rescission / cooling-off: Door-to-door home improvement contracts may include a three-business-day right to cancel when statutory notices are provided under RCW 19.36.
Mechanic's lien timeline: Washington’s lien law (RCW 60.04) requires preliminary notice to the owner on many residential jobs and strict recording deadlines from completion. Contractors must provide owners a notice about lien rights at the start of work — keep that document in your project file.

Where to file a complaint

Report unregistered contracting and registration fraud to L&I’s fraud unit. Trade licence complaints go through L&I as well. The Attorney General handles broader consumer complaints. Local building officials stop work that lacks permits.

File a complaint with the state →

If you hire someone unlicensed

Unregistered contractors may owe treble damages and penalties under consumer protection statutes if they collect payment for covered work. Insurance carriers deny many claims tied to unpermitted or unregistered work. Liens may still be filed when notice statutes are satisfied.

Which trades need a licence here

Trade licensing status in Washington
Trade	Status	Notes
Electrician	State licence	L&I contractor registration and/or trade licence.
Plumber	State licence	L&I contractor registration and/or trade licence.
HVAC / refrigeration	State licence	L&I contractor registration and/or trade licence.
General contractor / remodeler	State licence	L&I contractor registration and/or trade licence.
Roofer	Varies	May be a dedicated roofing licence, a general building classification, or local registration only.
Carpenter / handyman	No individual licence	No individual trade licence in most states; scope limits and contractor registration still apply to the business pulling permits.

Reciprocity

Washington does not grant automatic contractor registration reciprocity. Electrical and plumbing licensees from other states must apply through L&I and may need exams. Oregon and Idaho contractors working near the border still need Washington registration for Washington jobsites.

Cities and counties with an extra layer

Seattle, Bellevue, Tacoma, and Spokane require city business licences and have local energy code amendments. Coastal counties add tsunami and flood elevation rules; wildland-urban interface areas add defensible space requirements that affect exterior work.

Trade hubs

Cost guides

Metro pages

Local directory — Seattle

For contractors — getting and renewing a licence

Register with L&I, file bond and insurance, and display your registration number. Electrical and plumbing contractors pursue separate licence exams. Complete renewal and continuing education on time — homeowners see inactive status immediately online.

Trade-owner resources →

Common questions — Washington

When must a contractor register with Washington L&I?

Construction contractors who perform services for compensation above the dollar threshold set in RCW 18.27 must register with Labor & Industries, maintain a bond and insurance, and show their registration number on contracts and advertising. The threshold is low enough that most legitimate remodeling businesses must register. Handyman jobs under the threshold still may require permits and licensed trades.

How do I verify a Washington contractor registration?

Use the L&I Verify tool at secure.lni.wa.gov/verify. Active registration, bond, insurance, and endorsements appear on one record. If the business cannot give you a registration number that matches the portal, do not pay a deposit.

Does Seattle require more than state contractor registration?

Yes. Seattle and many other Washington cities require a city business licence and issue local building permits. State registration is necessary but not sufficient — ask the contractor for proof of city licence when the job is inside city limits.

Who licenses electricians in Washington?

L&I licenses electrical contractors and certifies electricians and administrators under RCW 19.28. Electrical work is not a good DIY exemption — permits and inspections are strict, and unlicensed work is a common reason insurers deny fire claims.

What lien notices do Washington homeowners receive?

Owners typically receive a Contractor’s Notice to Owner about lien rights at the start of the project, and subcontractors may send preliminary notices within a short window after starting work. These notices are not junk mail — they explain who might lien the property if not paid. Keep them with your payment records.

Is there a deposit cap for Washington home improvement contracts?

Washington focuses on registration, disclosure, and consumer protection rather than a single deposit percentage. Still, paying most of the contract before work is visible is risky. Structure payments around inspected milestones and use lien waivers when your attorney approves them.

Can I pull my own permit in Washington?

Many counties allow owner-builder permits if you occupy the home and meet local rules. You must hire registered contractors and licensed trades for work you cannot legally perform yourself. Selling a home with owner-permitted structural changes can trigger buyer inspections.

What happens if I hire an unregistered contractor in Washington?

L&I can pursue penalties against the contractor, and you may have difficulty enforcing warranties or recovering payments through the registration system. Permits may be denied mid-project, leaving partially completed work exposed to weather. Verification takes two minutes and prevents most of this.

Sources

Content reviewed 2026-10-06. Statutes and board URLs were checked at publication; confirm current text on the official site before relying on it in a dispute.