ContractorHistory

Contractors in Seattle, WA

3,755 active contractors are registered with Washington L&I at a Seattle, WA address. 8,145 registrations are on record in all, including expired and other statuses.

By the numbers

Active registrations
3,755
Registrations on record, all statuses
8,145
Registered in the last 12 months
510
Median years registered, active
6
Suspension on record
649
Complaint records matched
31

Trades in Seattle

Active registrations by trade group. The group is derived from the L&I license type and specialty; each contractor page shows the state's own wording.

Longest registered

  1. CASCADE MACHINERY & ELEC INCRegistered since January 5, 1960
  2. WILLIAMS, O B COMPANYRegistered since July 22, 1963
  3. W G CLARK CONSTRUCTION CORegistered since July 24, 1963
  4. FRYER KNOWLES INCRegistered since August 20, 1963
  5. SEATTLE BOILER WORKS INCRegistered since August 20, 1963

Recently registered

  1. DIVES HOME SOLUTIONSRegistered on October 7, 2026
  2. PRIME LEVEL LLCRegistered on October 7, 2026
  3. UDREAM BUILDERS PLLCRegistered on October 7, 2026
  4. IB BROTHERS CONSTRUCTION LLCRegistered on October 6, 2026
  5. RAIN LIFT GARAGE DOORS LLCRegistered on October 6, 2026

Active registrations, by the effective date on the state's record.

All 8,145 registrations on record

Businesses by registered name and license number. Show only the 3,755 active registrations.