Marin County construction: bids, contractors and projects
Caltrans lettings, licensed contractors and project news for Marin County, California, updated daily from public records.
Marin County is part of our District 4 (Oakland) coverage area and falls under Caltrans District 4 (Oakland), headquartered in Oakland. CSLB's license file lists 2,501 construction contractors with a Marin County address: 1,503 licensed General Engineering (A) and General Building (B) contractors and 998 licensed specialty (C) and Residential Remodeling (B-2) contractors. The largest single group is CSLB General Building (B) contractor (1,355). Most are based in San Rafael, Novato, Mill Valley.
Caltrans's advertised letting schedule currently has 1 upcoming proposal in Marin County, the next on Nov 10, 2026.
Upcoming Caltrans lettings in Marin County
| Letting | Proposal | Major work type | Documents |
|---|---|---|---|
| Nov 10, 2026 | 04-4Q3214 | Replace bridge & culverts, HMA, RHMA, Mod lighting & erosion control 路 License A,C-8,C-12,C-61,D-30 | Proposal |
Contractors based in Marin County
Counts come from the Contractors State License Board's License Master file (businesses whose license status is Clear and whose address is in Marin County). Firms holding a General Engineering (A) or General Building (B) classification are counted as general contractors; the rest as specialty contractors.
- CSLB General Building (B) contractor: 1,355
- CSLB specialty (C) contractor: 983
- CSLB General Engineering (A) contractor: 148
- CSLB Residential Remodeling (B-2) contractor: 15
Find Marin County subcontractors Find Marin County general contractors
Marin County project news
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How to bid public work in Marin County
State highway work in Marin County is let by Caltrans; the county is in Caltrans District 4 (Oakland) (Caltrans districts). Bidders need a CSLB license and, for public works, DIR public works contractor registration. See how to bid Caltrans contracts.
State agencies buy through Cal eProcure (see the supplier registration guide).
Statewide rules that apply here
- Bidding Caltrans: a CSLB license, DIR registration, a bidder ID and a digital ID
- California mechanics liens: 20 days to give notice, 90 days to record, 90 days to sue
Nearby counties
District 4 (Oakland) region: Alameda 路 Contra Costa 路 Napa 路 San Francisco 路 San Mateo 路 Santa Clara 路 Solano 路 Sonoma
Also in Caltrans District 4: (same as above)