Washington Contractor License Requirements
verifiedState-Level License RequiredWashington requires contractor registration for all construction work. Registration through L&I — no exam required. Surety bond of at least $12,000 required. Separate licensing for electrical and plumbing.
gavelHow Contractor Licensing Works in Washington
Washington registers every contractor through the Department of Labor & Industries — all construction work, any value, no exemptions. It is a registration rather than an exam-based license: no test stands between you and the credential, but the financial requirements are real, anchored by a surety bond of at least $12,000 and workers compensation through the state system. You will also need a UBI number tying the business into Washington's tax and licensing infrastructure. Electrical and plumbing licensing run through L&I's own trade sections, keeping everything under one agency. Oregon operates a similar register-and-bond model to the south, so contractors moving along the I-5 corridor will recognize the architecture, while Idaho to the east asks far less.
Assemble the pieces in this order: obtain the UBI number, purchase the surety bond, bind your insurance, set up workers compensation coverage, and file the L&I registration — with clean paperwork the whole sequence moves quickly, since there is no exam or board review to wait on. Registration renews every two years. The vulnerability in Washington is continuity: if the bond lapses or coverage drops, the registration suspends, and contractors sometimes discover this mid-project when a permit or payment issue surfaces it. Verify subcontractors' registrations too — hiring an unregistered sub creates liability exposure. Trade work needs L&I's electrical or plumbing licenses on every job, and the general registration does not cover it.
account_balanceLicensing Board
Board Name
Washington Department of Labor & Industries
Phone
(800) 647-0982
descriptionLicense Types
| Type | Threshold | Notes |
|---|---|---|
| General Contractor | All work | Registration required for all construction work |
| Specialty Contractor | All work | Specific trade classifications |
| Electrical | All work | Licensed through L&I Electrical Section |
| Plumbing | All work | Licensed through L&I Plumbing Section |
checklistRequirements
- check_circleContractor registration with L&I
- check_circleSurety bond ($12,000 min)
- check_circleProof of insurance
- check_circleWorkers compensation
- check_circleUBI number
paymentsFee Schedule
Application
$171
Annual Renewal
$171
Exam Fee
Not required for registration
event_repeatRenewal Period
Biennial — registration date
shieldInsurance Minimums
General Liability
$Not specifically required
Workers Compensation
Required
swap_horizReciprocity
- arrow_forwardNo reciprocity agreements
helpFrequently Asked Questions
Do I need a contractor license in Washington?
You need a contractor registration with the Department of Labor & Industries for all construction work — no dollar threshold exempts small jobs. No exam is required, but you must post a surety bond of at least $12,000, carry insurance, set up workers compensation, and hold a UBI number. Electrical and plumbing require separate L&I licenses.
What happens if I work unregistered in Washington?
L&I actively enforces against unregistered contractors with citations and fines, and unregistered contractors face severe barriers collecting payment through the courts. The registration requirement has no small-job exception, so there is no gray area — any construction work without active registration, bond, and coverage is a violation the department can act on.
Does Washington have reciprocity with Oregon or other states?
No reciprocity agreements exist, but Washington's exam-free registration limits what reciprocity would even waive. All contractors — including those licensed in Oregon, Idaho, or elsewhere — complete the same process: UBI number, surety bond at the $12,000 minimum, insurance, workers compensation, and the L&I registration filing. Trade licenses follow L&I's separate processes.
How long does Washington contractor registration take?
Fast, by national standards — with the UBI number, bond, and insurance in hand, L&I registration typically completes within days to a couple of weeks, since no exam or financial review applies. The maintenance matters more than the setup: registration renews biennially, and a lapsed bond or coverage gap suspends it automatically.
infoData sourced from state licensing board websites. Requirements change frequently — verify with your state board before applying. Last updated April 2026.