Washington State requires virtually all construction contractors to register with the Department of Labor & Industries (L&I) under Chapter 18.27 RCW. Unlike many states that use a traditional licensing exam system, Washington operates a registration-based system focused on bonding, insurance, and business accountability rather than trade examinations.
There is no general monetary threshold exempting small projects — RCW 18.27.020 states that every contractor shall register. Operating without a valid registration is a gross misdemeanor that can result in fines of $1,200 to $10,000 per violation.
This guide covers the full Washington contractor registration process: registration types, requirements, application steps, fees, bond and insurance obligations, renewal, reciprocity, and penalties for unregistered work.
Types of Contractor Licenses
Washington's contractor registration system under RCW 18.27.010 recognizes two primary classifications:
General Contractor
A general contractor registration authorizes a contractor to perform or coordinate a broad range of construction work. General contractors typically manage building projects and may subcontract portions of the work to specialty contractors. The general contractor classification carries a higher bond requirement ($30,000) than the specialty classification.
Specialty Contractor
A specialty contractor registration covers work in a specific trade or craft. L&I recognizes 63 specialty classifications as defined in WAC 296-200A-016. The specialty contractor bond requirement is $15,000.
Additional Trade Licenses
Beyond the Chapter 18.27 contractor registration, certain trades require separate licenses or certifications administered by L&I. These include:
- Electrical contractors — Electrical contractor license
- Plumbing contractors — Plumbing contractor license
- Elevator contractors — Elevator contractor license
- Asbestos contractors — Asbestos contractor certification
- Boiler and mobile home installation — Additional L&I programs
If your work falls into one of these trades, you will need both a Chapter 18.27 contractor registration and the applicable trade-specific license.
Licensing Requirements
Washington's contractor registration requirements are defined in RCW 18.27.030 and WAC 296-200A-025. To register, you must provide:
Business Registration
Before applying for contractor registration, you must register your business with the Washington Department of Revenue (DOR) and obtain a Unified Business Identifier (UBI) number. L&I cannot process your contractor registration until it verifies your DOR business-license filing and excise-tax account.
DOR requires a business license if, among other triggers, the business needs endorsements, uses a trade name, hires employees, collects sales tax, or has $12,000 or more in annual gross income.
Application Information
The contractor registration application (Form F625-001-000) requires:
- Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN)
- Unified Business Identifier (UBI) number
- Contractor type (general or specialty)
- Owner, officer, and member information
- Workers' compensation and Employment Security information (unless the business has no Washington employees)
The application must be notarized.
Surety Bond
All registered contractors must maintain a surety bond filed with L&I. The minimum amounts under RCW 18.27.040 are:
- General contractors: $30,000
- Specialty contractors: $15,000
Higher bond tiers may apply based on prior final residential judgments, reaching up to $90,000 for general contractors and $45,000 for specialty contractors per WAC 296-200A-030.
Liability Insurance
Contractors must carry liability insurance meeting the minimums in RCW 18.27.050. L&I accepts either:
- $200,000 public liability and $50,000 property damage, or
- $250,000 combined single limit
The bond and insurance must use the exact business name on the registration, and L&I must be listed as the certificate holder on the liability insurance policy.
Experience, Education, and Background Checks
The research did not identify experience, education, examination, or background check requirements under Chapter 18.27 for the general contractor registration. Verify current requirements directly with L&I's contractor registration page, RCW Chapter 18.27, and WAC Chapter 296-200A. Note that separate trade licenses (electrical, plumbing, etc.) have their own examination and experience requirements.
Grounds for Denial
Under RCW 18.27.030, L&I may deny or suspend a registration for:
- Unsatisfied final judgments
- Money owed to L&I for penalties or fees
- Invalid UBI number
- False information on the application
- Lack of active DOR registration
- Applicant under age 18
Application Process
The Washington contractor registration process involves coordination between two state agencies — the Department of Revenue (DOR) and the Department of Labor & Industries (L&I). Here is the step-by-step process:
- Register Your Business with DOR: Apply for a business license through the DOR Business License Wizard or the DOR Apply for a Business License page. You will receive your UBI number after approval. Online applications take approximately 10 business days, plus 2-3 additional weeks if endorsements are needed. Mailed applications can take up to six weeks.
- Obtain Your Surety Bond: Purchase a surety bond for the required amount ($30,000 for general contractors, $15,000 for specialty contractors) from a licensed surety company. The bond must use your exact registered business name.
- Obtain Liability Insurance: Secure a liability insurance policy meeting the minimum requirements ($200,000/$50,000 or $250,000 CSL). L&I must be listed as the certificate holder.
- Complete the Application: Download and complete the Contractor Registration Application (Form F625-001-000). The application must be notarized.
- Submit to L&I: Mail or deliver in person the original notarized application along with proof of bond and insurance to:
Contractor Registration
PO Box 44450
Olympia, WA 98504-4450 - Pay the Registration Fee: Include the $141.10 registration fee with your application.
- Wait for Processing: L&I is currently taking 3-4 weeks after receipt to process and activate completed applications. Your registration card will arrive approximately 2 weeks after activation.
You can also begin the registration process through the L&I online portal or manage your registration via L&I Quick Cards.
Examination Requirements
Washington's Chapter 18.27 contractor registration does not appear to require a written examination for general or specialty contractor registration. The research did not verify any contractor-registration exam requirement in RCW 18.27, WAC 296-200A, or the L&I registration materials.
This is a notable difference from many other states. Washington's system emphasizes financial accountability (bonding and insurance) over trade competency testing at the general registration level.
However, separate trade licenses do require examinations. If you perform electrical, plumbing, elevator, or other specially regulated work, you will need to pass the applicable trade exams administered by L&I in addition to holding a Chapter 18.27 contractor registration.
Verify the most current examination requirements with L&I, RCW Chapter 18.27, and WAC Chapter 296-200A.
License Fees and Costs
All current L&I contractor registration fees are published in WAC 296-200A-900. DOR business license fees are listed on the DOR Variable Business License Processing Fees page.
L&I Contractor Registration Fees
| Fee Type | Amount |
|---|---|
| Registration (new application) | $141.10 |
| Renewal (every 2 years) | $141.10 |
| Reregistration | $141.10 |
| Reinstatement | $66.60 |
| Duplicate Certificate | $15.50 |
| Certified Letter Prepared by L&I | $31.80 |
| Service-of-Process Charge | $62.20 |
| Copies from Contractor File | $2.30/copy (max $34.80/file) |
DOR Business License Fees
| Fee Type | Amount |
|---|---|
| Opening / Reopening a Business License | $50 |
| Any Other Purpose | $10 |
| Annual Renewal Processing Fee | $5 + endorsement fees |
| Late Renewal Penalty | Half of endorsement fee (up to $150) |
Estimated Total Cost for New Registration
For a new specialty contractor, the approximate out-of-pocket cost to register includes:
- DOR business license: $50
- L&I registration fee: $141.10
- Surety bond premium (for $15,000 bond): varies, typically $100-$500/year depending on credit
- Liability insurance: varies by trade and coverage level
- Total estimate: $400 to $900+ (not including insurance premiums)
General contractors should expect slightly higher costs due to the larger $30,000 bond requirement.
Insurance and Bond Requirements
Surety Bond
All Washington contractors must file and maintain a surety bond with L&I under RCW 18.27.040. The bond protects consumers and provides a source of recovery for claims against the contractor.
| Contractor Type | Standard Bond | Maximum Bond |
|---|---|---|
| General Contractor | $30,000 | $90,000 |
| Specialty Contractor | $15,000 | $45,000 |
Higher bond amounts apply to contractors with qualifying prior final residential judgments, as outlined in WAC 296-200A-030. Your annual premium for the bond is typically 1-10% of the bond face value, depending on your credit history and business track record.
Liability Insurance
Under RCW 18.27.050, all registered contractors must carry liability insurance. L&I accepts the following minimum coverages:
| Coverage Option | Minimum Amount |
|---|---|
| Option A: Public Liability | $200,000 |
| Option A: Property Damage | $50,000 |
| Option B: Combined Single Limit | $250,000 |
Key requirements for your insurance policy:
- The policy must use the exact business name on your contractor registration.
- L&I must be listed as the certificate holder on the liability insurance certificate.
- Coverage must remain active for the entire registration period.
Workers' Compensation Insurance
If your business has employees in Washington, you must maintain workers' compensation coverage and be registered with the Employment Security Department. Your workers' compensation and Employment Security information is required on the contractor registration application. Contractors with no Washington employees may be exempt from this requirement but must still indicate their status on the application.
License Renewal
Washington contractor registrations are valid for two years under RCW 18.27.060. You must renew on or before the expiration date.
Renewal Process
- L&I sends a renewal notice no more than 45 days before expiration.
- You can renew online through L&I Quick Cards, by mail, or in person — provided your business has not had disqualifying changes.
- Renewal requires the $141.10 renewal fee plus current proof of bond and liability insurance.
- You must report address changes to L&I within 10 days per WAC 296-200A-025.
Lapsed Registration
Under RCW 18.27.010, a contractor whose registration has lapsed for 30 or fewer days is not considered an "unregistered contractor" — provided they maintained the required bond and insurance during the lapse. This grace period does not excuse late renewal but provides a narrow window to avoid the harshest penalties.
Reinstatement
If your registration is suspended, reinstatement requires proof that the cause of suspension has been corrected plus the $66.60 reinstatement fee per WAC 296-200A-040.
Continuing Education
The research did not identify a continuing education requirement under Chapter 18.27 for contractor registration renewal. Verify current requirements with L&I and WAC Chapter 296-200A. Note that separate trade licenses (electrical, plumbing, etc.) may have their own CE requirements.
Reciprocity with Other States
The research did not identify a reciprocity provision under Chapter 18.27 for contractor registration. Washington does not appear to waive registration requirements for contractors licensed in other states, and no evidence was found that Washington accepts the NASCLA exam for general contractor registration purposes.
Out-of-state contractors wishing to work in Washington must complete the full registration process, including obtaining a DOR business license, filing a surety bond and liability insurance with L&I, and submitting a notarized application.
There is one notable exception outside of Chapter 18.27: L&I has a reciprocal plumber certification agreement with Idaho for journey-level plumbers. See the L&I Plumber Examination page for details.
For the latest information on reciprocity, verify with L&I, RCW Chapter 18.27, and WAC Chapter 296-200A.
How to Verify a Contractor's License
Washington provides a free online tool to verify any contractor's registration status. This is essential for homeowners hiring a contractor and for general contractors verifying subcontractor credentials.
L&I Verify Tool
URL: https://secure.lni.wa.gov/verify/
You can search by contractor name, registration number, or UBI number. The tool is also available through the L&I Verify Contractor page.
Report a Problem Contractor
If you encounter an unregistered contractor or have a complaint, you can file a report through L&I's Report a Contractor tool.
Disclosure Statement Requirement
Washington requires contractors to provide a Disclosure Statement Notice to Customer (Form F625-030-000) for residential jobs of $1,000 or more and certain commercial jobs from $1,000 to $60,000.
L&I Contact Information
| Toll-Free Phone | 1-800-647-0982 |
| Direct Phone | 360-902-5226 (Option 2) |
| ContReg@Lni.wa.gov | |
| Mailing Address | Department of Labor & Industries, Contractor Registration Section, PO Box 44450, Olympia, WA 98504-4450 |
| Website | L&I Contractor Registration |
Penalties for Working Without a License
Operating as an unregistered contractor in Washington is a serious offense. Under RCW 18.27.020, the following activities without a valid registration are each a gross misdemeanor:
- Advertising, offering, or bidding on construction work
- Performing construction work
- Using a false or expired registration number
- Transferring a registration to another party
- Subcontracting to an unregistered contractor
After a citation, each day worked and each worksite constitutes a separate gross misdemeanor.
Financial Penalties
Under RCW 18.27.340:
| Violation Type | Fine Range |
|---|---|
| Failure to register | $1,200 – $10,000 |
| First offense (if registered within 10 days) | Reducible to $600 minimum |
| General Chapter 18.27 infractions | $200 – $10,000 |
Escalating Penalty Schedule
Under WAC 296-200A-400, penalties escalate with repeat offenses:
| Offense Number | RCW 18.27.100(1)-(4) Violations | RCW 18.27.200 Violations |
|---|---|---|
| First | $250 | $1,200 |
| Second | $750 | $3,000 |
| Third | $2,250 | $5,000 |
| Fourth | $5,000 | $10,000 |
| Each additional | $10,000 | $10,000 |
Consumer Protection
Under RCW 18.27.350, Chapter 18.27 violations are deemed to affect the public interest and constitute a violation of the Consumer Protection Act (Chapter 19.86 RCW). The L&I director may also waive collection of penalties in favor of restitution to affected consumers.
Frequently Asked Questions
How long does it take to get a Washington contractor registration?
The total timeline depends on two steps. DOR business license processing takes about 10 business days online (up to six weeks by mail), plus 2-3 weeks if endorsements are needed. After that, L&I takes 3-4 weeks to process a completed contractor registration application, and the registration card arrives about 2 weeks after activation. Plan for 6-10 weeks total.
Does Washington require a contractor exam?
The Chapter 18.27 contractor registration does not appear to require a written examination for general or specialty contractors. However, specific trades such as electrical, plumbing, and elevator work have their own exam requirements under separate L&I programs. Verify with L&I for the most current requirements.
What is the difference between a general and specialty contractor registration?
A general contractor can perform or coordinate a broad range of construction work and must carry a $30,000 bond. A specialty contractor performs work in one of 63 defined trade specialties and carries a $15,000 bond. Both types require the same registration fee ($141.10) and liability insurance minimums.
Can I use my out-of-state license in Washington?
Washington does not appear to have reciprocity agreements for Chapter 18.27 contractor registration. Out-of-state contractors must complete the full registration process, including DOR business registration, surety bond, liability insurance, and the notarized L&I application. A limited reciprocity exists for journey-level plumbers with Idaho certification.
What happens if my registration lapses?
Under RCW 18.27.010, a contractor whose registration has lapsed for 30 or fewer days is not considered "unregistered" as long as the required bond and insurance were maintained. Beyond 30 days, you risk gross misdemeanor charges and fines of $1,200 to $10,000. If your registration is suspended, reinstatement costs $66.60 plus proof that the suspension cause has been corrected.
Do I need both a DOR business license and an L&I contractor registration?
Yes. The DOR business license and the L&I contractor registration are separate requirements. You must obtain the DOR business license first — L&I cannot process your contractor registration until it verifies your DOR filing and excise-tax account. The DOR license costs $50 to open, and the L&I registration costs $141.10.
Conclusion
Washington's contractor registration system is more streamlined than many states — there is no general trade exam, and the process centers on financial accountability through bonding and insurance. That said, you must coordinate between two agencies (DOR and L&I), submit a notarized application, and maintain active bond and insurance coverage at all times.
Start by registering your business with the Department of Revenue, then complete your contractor registration through L&I. For questions, call L&I at 1-800-647-0982 or email ContReg@Lni.wa.gov.
This article is provided for informational purposes and was last updated in April 2026. Registration requirements, fees, and regulations are subject to change. Always verify current requirements directly with the Washington Department of Labor & Industries.