Duwamish Services Llc
Duwamish Services Llc is an active, licensed contractor operating in Seaittle, WA. Operating under a California contractor license established in 2025. They hold A General Engineering Contractor and HAZ Hazardous Substance Removal Certification licenses. They currently maintain an active contractor bond and workers' compensation insurance. No disciplinary actions have been recorded against this license.
License Information
- License Number
- 1139640
- Status
- Active
- Classification(s)
- A: General Engineering Contractor, HAZ: Hazardous Substance Removal Certification
- Tenure
- Licensed since 2025 (0 years)
- Issue Date
- June 30, 2025
- Expiration Date
- June 30, 2027
- Disciplinary Record
- No Disciplinary Actions
Bond & Insurance
- Contractor Bond
- Bonded ($25000) – MERCHANTS BONDING COMPANY (MUTUAL)
- Workers’ Compensation
- Workers' Compensation Insurance – GREAT AMERICAN ASSURANCE COMPANY
A contractor’s bond protects consumers up to the bond amount if the contractor fails to fulfill contractual obligations or violates CSLB regulations.
Workers’ compensation insurance protects homeowners from liability if a contractor’s employee is injured on the job site.
Location
- Address
- 7421 5TH AVE SOUTH
- City
- Seaittle, CA
- ZIP Code
- 98108
- Phone
- (206) 644-5088
About These License Types
A: General Engineering Contractor
Authorizes construction of fixed works requiring specialized engineering knowledge and skill, including irrigation, drainage, water power, water supply, flood control, inland waterways, harbors, docks, shipyards, dams, hydroelectric projects, levees, railroads, highways, tunnels, airports, sewers, bridges, pipelines, parks, refineries, and power plants.
Not authorized: Does not authorize work under a Class B General Building Contractor license or any specialty (C) classification unless incidental to the engineering project.
HAZ: Hazardous Substance Removal Certification
An add-on certification for removal of hazardous substances. Only issued to contractors holding A, B, C-12, C-21, C-36, C-57, or C-61/D-40 licenses.
Not authorized: Restricted to contractors holding qualifying base licenses.
Verify on Official CSLB Website
License data sourced from the California Contractors State License Board. Last data update: February 20, 2026.