General engineering contractors in Petrolia, CA

3 licenses with the A classification list Petrolia (Humboldt County) as their address with the state, 3 of them active. Active licenses with nothing flagged come first.

• ✓Mattole Valley Construction IncA · B · #951867 Petrolia · Humboldt County Active
• ✓Patrick Queen ConstructionA · B · #897212 Petrolia · Humboldt County Active
• ✓Safier Construction CompanyA · B · #496376 Petrolia · Humboldt County Active

Source: CSLB license file, Nov 6, 2026All trades in Petrolia