Auto Repair Shop Permit Requirements in Seattle, WA

Complete permit and license guide for starting a auto repair shop in Seattle, King County, Washington.

$700 -- $3000 5–12 weeks to obtain all licenses, permits, and complete inspections 9 requirements

Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: February 15, 2026.

Seattle / King County Requirements

4 requirements

Seattle Business License Tax Certificate

All businesses operating in Seattle must obtain a Business License Tax Certificate from the City of Seattle Finance Department. Auto repair shops are subject to Seattle's Business and Occupation (B&O) tax based on gross receipts. The certificate is renewed annually. New businesses pay the Tier 1 fee in the first year.

$110–$2,000/year (based on gross receipts tier)1–2 weeks

Official government source

Seattle Department of Construction and Inspections — Certificate of Occupancy

Auto repair shops must obtain a Certificate of Occupancy (CO) from the Seattle Department of Construction and Inspections (SDCI). Auto repair is typically permitted in Industrial (IG, IB) and some Commercial zones. A building permit is required for tenant improvements.

$200–$1,000 (varies by project scope)4–10 weeks

Official government source

Seattle Fire Department Inspection

Auto repair shops must pass a Seattle Fire Department inspection as part of the CO process. Shops must post labor rates in a visible location and comply with fire codes for flammable liquid storage and safety systems.

Included in CO fees1–3 weeks

Official government source

Washington State Ecology — Dangerous Waste and Used Oil

Seattle auto repair shops generating used oil, antifreeze, solvents, and other hazardous materials must comply with Washington State Department of Ecology dangerous waste regulations. Paint booths require an air quality permit from the Puget Sound Clean Air Agency (PSCAA).

Free (registration); PSCAA air permits $200–$1,5004–8 weeks

Official government source

Washington State Requirements

3 requirements

Washington State Business License (UBI)

All Washington businesses must obtain a state Unified Business Identifier (UBI) number and Business License through the Washington Secretary of State / Department of Revenue. Auto repair shops require a state business license. Seattle business licensing also requires the state endorsement.

$90 (initial application; varies by endorsements needed)1–2 weeks

Official government source

Washington Sales Tax Registration

Auto repair shops must collect Washington sales tax on parts sold and taxable labor. Washington taxes certain auto repair services. The King County combined rate is approximately 10.25%. Auto repair shops register through the Washington DOR online system.

Included in state business license1–2 weeks

Official government source

EPA Section 609 Certification (Automotive A/C)

Technicians servicing vehicle air conditioning systems must be EPA Section 609 certified. Required for individual technicians handling refrigerants.

$20–$35 per technicianExam at approved testing center; certificate immediate upon passing

Official government source

Federal Requirements

2 requirements

EPA Small Quantity Generator (SQG) Registration

Auto repair shops that generate used oil, antifreeze, or other hazardous waste must register with the EPA as a hazardous waste generator. Most auto shops qualify as Small Quantity Generators (SQG). Registration is administered through Washington State Ecology.

Free (registration only; disposal costs vary)2–4 weeks

Official government source