Is My Contractor Licensed in Washington?

Plumbers in Washington

Licensed by: Washington State Department of Labor and Industries (L&I)

L&I states that only L&I-certified plumbers can legally perform plumbing work on someone else's property; property owners may do plumbing work on their own property. Certification requires on-the-job training hours and a passing exam. Homeowners can check a plumber or plumbing business with L&I's Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Plumbing - Washington State Department of Labor and Industries  ·  34 plumbing companies in Washington on 1-800Deals

Electricians in Washington

Licensed by: Washington State Department of Labor and Industries (L&I)

L&I licenses and bonds electrical contracting businesses, and the electricians they send must hold L&I electrician certificates earned through training and an exam. L&I advises property owners to confirm licensing, bonding and certification before work starts using its Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Hiring an Electrical Contractor - Washington State Department of Labor and Industries  ·  7 electricians companies in Washington on 1-800Deals

HVAC (heating and air) in Washington

Licensed by: Washington State Department of Labor and Industries (L&I)

HVAC is one of the specialties that requires contractor registration with L&I, and registered contractors must be bonded and insured. Electrical work on HVAC and refrigeration equipment is covered by L&I electrician certification, which includes HVAC/refrigeration specialty electrician certificates. Check any HVAC business in L&I's Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Register as a Contractor - Washington State Department of Labor and Industries  ·  7 hvac companies in Washington on 1-800Deals

Roofers in Washington

Licensed by: Washington State Department of Labor and Industries (L&I)

Washington requires all construction contractors to register with L&I, and roofing is listed as one of the specialties that requires registration. Registered contractors must carry a surety bond and liability insurance; L&I lists the bond as 30,000 dollars for general contractors and 15,000 dollars for specialty contractors (as of 2026). Confirm a roofer's registration in L&I's Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Register as a Contractor - Washington State Department of Labor and Industries  ·  1 roofing company in Washington on 1-800Deals

Pest control in Washington

Licensed by: Washington State Department of Agriculture (WSDA)

WSDA requires a Commercial Applicator license for businesses that apply pesticides to the land or property of another; it is a joint company and individual license, and the company must show liability insurance or a surety bond. Separate Structural Pest Inspector licenses cover wood destroying organism inspections. Homeowners can check a license with WSDA's Pesticide and SPI license search.

Look up a license  ·  Source: Commercial Applicators - Washington State Department of Agriculture  ·  15 pest control companies in Washington on 1-800Deals

Garage door companies in Washington

Licensed by: Washington State Department of Labor and Industries (L&I)

Washington requires all construction contractors, including those who repair or remodel buildings, to register with L&I as a general or specialty contractor and to be bonded and insured. L&I does not publish a separate garage door license on this page, so a company installing or repairing garage doors should hold a current L&I contractor registration. Check the company in L&I's Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Register as a Contractor - Washington State Department of Labor and Industries  ·  12 garage doors companies in Washington on 1-800Deals

Water damage restoration in Washington

Licensed by: No statewide license

The Washington State Department of Health states there are no specific certification requirements for performing mold or water damage restoration in Washington. It suggests hiring a contractor who is licensed, bonded and insured, and repair or rebuild work is construction work that requires L&I contractor registration. Check a company's contractor registration in L&I's Verify a Contractor, Tradesperson or Business tool.

Look up a license  ·  Source: Hiring an Indoor Air Investigator or Contractor - Washington State Department of Health  ·  68 water damage restoration companies in Washington on 1-800Deals

Frequently asked questions

How do I check if a contractor is licensed in Washington?

Use the Department of Labor and Industries Verify a Contractor, Tradesperson or Business tool at secure.lni.wa.gov/verify. You can search by name, license or registration number, or UBI number to see a contractor's registration, bond and insurance status and a tradesperson's certification.

Do all Washington contractors have to register with the state?

Yes. L&I states that Washington requires all construction contractors to register and to be bonded and insured. General contractors can do most types of work, while specialty contractors such as roofers and HVAC contractors can only work in the specialty they are registered in.

Can a homeowner do their own plumbing in Washington?

Yes. L&I says property owners may do plumbing work on their own property, but only L&I-certified plumbers can legally perform plumbing work on someone else's property.

This page is general information, not legal advice. 1-800Deals does not license, verify or endorse contractors. See all states: contractor licensing by state.