City guides
Walnut Creek
Small-deck permit exemption, hillside neighborhoods, protected native oaks.
Lafayette
Hillside lots, County building inspection, protected native trees from 12 in diameter.
Orinda
Most Very High fire acreage in the county, MOFD ordinances, steep wooded lots.
Danville
1980s homes and decks due for replacement, SRVFPD maps, Blackhawk and Diablo HOAs.
Also nearby
- MoragaLamorinda town with 1970s-era homes; Town planning with County building inspection; MOFD fire district; Very High areas on the 2025 maps.
- Pleasant HillFlat-to-rolling lots north of Walnut Creek with its own Building Division; not on the 2025 Very High list.
- ConcordLarger city with its own Permit Center; Very High areas on the 2025 maps.
- ClaytonFoothill town below Mt. Diablo; County plan check and inspection; Very High areas on the 2025 maps.
- AlamoUnincorporated: Contra Costa County permits, San Ramon Valley Fire, large lots with mature oaks.
- BlackhawkUnincorporated gated community: County permits plus Blackhawk HOA architectural review.
- DiabloSmall unincorporated community near Mt. Diablo: County permits and the Diablo property owners association.
Fire-map notes from 2025 reporting on the new LRA maps. Permit authorities: deck permits by city.