This is not a Natural Hazard Disclosure statement. Open state data, explained; flood and dam zones are not covered. Details
Fire hazard severity zones in Contra Costa County
54.4% of Contra Costa County is mapped in a fire hazard severity zone, and 48.0% in High or Very High, where the seller disclosures apply.
Very High zone17.4% of the area
High zone30.6%
Moderate zone6.4%
Earthquake fault zone1.1%
Liquefaction zone34.5%
Landslide zone19.9%
Not evaluated for seismic hazards7.7%: a zero above proves nothing there
Fires recorded since 195079
Land area760.3 sq mi
Median home value (2019-2023)$830,800
Flood and dam zonesnot covered
Cities and places in Contra Costa County
- Acalanes Ridge (0%)
- Alamo (50%)
- Alhambra Valley (100%)
- Antioch (23%)
- Bay Point (19%)
- Bayview (0%)
- Bethel Island (0%)
- Blackhawk (48%)
- Brentwood (7%)
- Byron (4%)
- Camino Tassajara (11%)
- Castle Hill (43%)
- Clayton (68%)
- Clyde (0%)
- Concord (8%)
- Contra Costa Centre (0%)
- Crockett (60%)
- Danville (12%)
- Diablo (60%)
- Discovery Bay (0%)
- East Richmond Heights (84%)
- El Cerrito (20%)
- El Sobrante (36%)
- Hercules (23%)
- Kensington (45%)
- Knightsen (0%)
- Lafayette (55%)
- Martinez (23%)
- Montalvin Manor (0%)
- Moraga (75%)
- Mountain View (0%)
- Norris Canyon (98%)
- North Gate (88%)
- North Richmond (0%)
- Oakley (0%)
- Orinda (73%)
- Pacheco (0%)
- Pinole (0%)
- Pittsburg (16%)
- Pleasant Hill (2%)
- Port Costa (100%)
- Reliez Valley (64%)
- Richmond (24%)
- Rodeo (19%)
- Rollingwood (0%)
- San Miguel (5%)
- San Pablo (8%)
- San Ramon (11%)
- Saranap (0%)
- Shell Ridge (16%)
- Tara Hills (0%)
- Vine Hill (0%)
- Walnut Creek (28%)
Percent of the area in High or Very High zones.
Fires recorded in or across Contra Costa County
The state record shows 79 since 1950. The largest was SCU LIGHTNING COMPLEX in 2020 (396,824 acres in total).
- WALNUT (2025), 51 acres
- SOMERSVILLE (2025), 358 acres
- WILBUR (2024), 2 acres
- SARDIS (2024), 11 acres
- SARDIS 2 (2024), 5 acres
- POINT (2024), 462 acres
- BRUNS (2022), 12 acres
- HIGHLAND (2022), 92 acres
- CAMINO (2022), 19 acres
- BARRY (2022), 40 acres
- DEER (2022), 15 acres
- FRANKLIN (2022), 50 acres
- KIRKER (2022), 85 acres
- WILLOW (2022), 29 acres
- SCENIC (2022), 120 acres