Solano County is comprised of multiple incorporated cities, each operating its own building and planning departments. The county Planning Services department handles unincorporated areas. Geographic overlays such as flood zones, coastal influence, and fire hazard severity zones may require additional review by relevant county or state agencies.
Many cities within Solano County have specific tree ordinances that regulate the removal or significant alteration of trees on private property, requiring permits and potentially mitigation.
How this fits with the state
The state authority here is California Contractors State License Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · City-by-city; cities run their own permit operationsLast verified · 05 / 2026