MADDEN ENGINEERING
California contractor license #1151893 · Concord, Contra Costa County
License
- License number
- 1151893
- Status
- Clear
- Classifications
- A General Engineering Contractor
- Business type
- Limited Liability
- Issued
- Mar 13, 2026
- Expires
- Mar 31, 2028
- Workers' compensation
- Workers' Compensation Insurance — State Compensation Insurance Fund
- Contractor's bond
- $25,000 — Nationwide Mutual Insurance Company
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Aug 12, 2026. Verify license #1151893 on CSLB's License Check.
California public works
MADDEN ENGINEERING appears on 4 public works projects registered with the California Department of Industrial Relations, for 4 awarding bodies between 2025 and 2026.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Jun 30, 2026 | City of Brentwood EarthTec Tank PadConcrete & masonry | Contra Costa Water District | Subcontractor | $89,276 |
| Jan 30, 2026 | North Grasslands Intertie ProjectOther | Ducks Unlimited | Subcontractor | $21,750 |
| Sep 9, 2025 | Centrifuge Dewatering ImprovementsBridges & structures | Central Marin Sanitation Agency | Subcontractor | $2,546,800 |
| — | Digester Cleanining & Rehabilitation ProConcrete & masonry | Sanitary District No.5 of Marin County | Subcontractor | $2,514,400 |
Most recent 4 of 4. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- Contra Costa Water District · 1 project
- Sanitary District No.5 of Marin County · 1 project
- Ducks Unlimited · 1 project
- Central Marin Sanitation Agency · 1 project
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