§ 01
How it works
The Washington licensing system in plain English
Washington registers contractors statewide through L&I rather than using a local-only model. The system ties registration to bond and insurance requirements, which gives homeowners meaningful consumer-protection data in one place. Because the threshold is low, many ordinary residential jobs should involve a registered contractor. Homeowners should still verify separate trade credentials where necessary, but the L&I contractor record is the central first step for most residential hiring.
§ 02
Thresholds
When a Washington license is required
Washington generally requires contractor registration for jobs of $1,000 or more, and registered contractors must maintain a bond and insurance.
§ 03
What to verify
Before you sign anything
Use the L&I Verify tool and search by business name, UBI number, or contractor registration number. Confirm the registration is active and review bond and insurance status, because Washington makes those elements visible to the public. Match the legal entity on the record to the company on your contract and permit paperwork. If the project includes specialty trades, use the same state resources to verify those credentials separately instead of assuming the prime contractor record covers all work.
§ 04
Homeowner tips
Practical guidance for Washington
- 01 Read the bond and insurance details in L&I Verify; Washington gives homeowners unusually useful screening information there.
- 02 If the contract is over $1,000, ask for the registration number before discussing scheduling or deposits.
- 03 For Seattle-area jobs, local permits still matter, but the statewide L&I contractor record should be your first check.
- 04 If the contractor gives only a UBI number, use it to pull the exact L&I record and compare the legal entity carefully.
- 05 On roofing and exterior-envelope work, verify the registration before materials arrive because weather-driven scheduling can pressure homeowners into rushing.
§ 05
Frequently asked
Washington-specific licensing questions
01 What work requires a registered contractor in Washington? ▸
Washington requires all contractors performing work for compensation to be registered with the Department of Labor & Industries (L&I) under RCW 18.27. There is no meaningful dollar threshold — virtually all paid construction, repair, and home improvement work requires L&I registration. Specialty trades — electrical, plumbing, HVAC — require separate state licenses in addition to contractor registration.
02 What is the difference between bonded, registered, and insured? ▸
Registered means the contractor is registered with Washington L&I and has met the required bond and insurance conditions as a prerequisite for registration. Bonded means the contractor carries a surety bond required by L&I — $12,000 for general contractors, $6,000 for specialty contractors. General liability insurance is also required as a condition of L&I registration, making Washington's baseline consumer protections stronger than most states.
03 Is there a dollar threshold below which I don't need a registered contractor in Washington? ▸
No. Washington requires contractor registration for virtually all paid construction work, regardless of project size. This is one of the broadest requirements in the country. The only exceptions are narrow: homeowners performing work on their own residence, and a handful of specific exemptions listed in RCW 18.27.
04 Can I do my own home improvement work without a registered contractor in Washington? ▸
Yes. Washington's homeowner exemption allows you to perform construction work on your own primary residence without L&I registration. You must own and intend to occupy the property and perform the work yourself — you cannot hire unregistered workers to do the work on your behalf. If you sell the property, Washington requires disclosure of owner-performed construction to the buyer.
05 What registration does a general contractor need in Washington? ▸
Washington issues General Contractor and Specialty Contractor registration through L&I rather than tiered license classes. A General Contractor registration covers construction involving multiple trades. Specialty Contractor registration covers individual trades — electrical is licensed separately through L&I's Electrical Program, with separate credentials for plumbing and HVAC. Always verify the contractor's registration category matches your project scope.
06 How do I verify a contractor's registration in Washington? ▸
Use the L&I Contractor Lookup at lni.wa.gov. Search by contractor name, business name, or UBI number. Confirm the registration is Active and that bond and insurance requirements are current. The L&I record shows registration status, bond amount, liability insurance, and any L&I violations or legal actions — review all sections before signing a contract.
07 What does an active vs. inactive registration mean in Washington? ▸
An Active registration means the contractor is in good standing with L&I and legally authorized to perform work. An Inactive or lapsed registration means they cannot legally work — usually because bond, insurance, or fees have expired. Always verify Active status on the L&I website immediately before hiring — an inactive registration provides no consumer protection.
08 What insurance and bond does a registered contractor need in Washington? ▸
L&I requires general contractors to carry a $12,000 surety bond; specialty contractors carry a $6,000 bond. General liability insurance is also required as a condition of registration. Contractors with employees must maintain workers' compensation coverage through L&I. Washington's requirement for both bond and liability insurance at the registration level makes its consumer protection baseline stronger than many states.
09 What happens if a contractor works without registration in Washington? ▸
Performing contracting work without L&I registration is a gross misdemeanor under RCW 18.27.020, punishable by fines up to $5,000 and possible imprisonment. L&I can issue stop-work orders and civil penalties. Contracts with unregistered contractors may be unenforceable. Homeowners who paid an unregistered contractor may be able to recover those payments under Washington's Consumer Protection Act.
10 My contractor's registration expired mid-project — what now? ▸
An expired L&I registration means the contractor is no longer legally authorized to work. Stop payments for work performed after the expiration date and require renewal before continuing. Verify Active status on the L&I website before releasing further payments. Washington's Consumer Protection Act may provide grounds to dispute payments for work performed without active registration.
11 Am I liable if an unlicensed worker gets hurt on my property in Washington? ▸
Potentially yes. If a contractor has no workers' compensation coverage and an employee is injured, Washington law may expose you to liability for medical costs and benefits as the de facto employer. Hiring an L&I-registered contractor with verified workers' comp coverage eliminates this risk; confirm compliance through the L&I record before work begins.
12 How do I file a complaint against a contractor in Washington? ▸
File a complaint with L&I at lni.wa.gov. L&I investigates, can issue civil penalties, suspend or revoke registrations, and refer cases to the Attorney General. Homeowners may also file a claim against the contractor's surety bond. The Washington Attorney General's Consumer Protection Division handles contractor fraud cases. File as early as possible — time limits apply.
state Washington agency Labor & Industries Verify Tool tier 2
Labor & Industries Verify Tool is the official source for contractor licensing information in Washington. Always verify a contractor's license before hiring. Jaspector is not affiliated with Labor & Industries Verify Tool; this page is informational guidance only.