Flood Zones: Brentwood vs Oakley
How do flood zones rules compare between Brentwood, CA and Oakley, CA?
Brentwood and Oakley have similar restriction levels.
Brentwood, CA
Contra Costa County
Portions of Brentwood lie within FEMA-designated Special Flood Hazard Areas (SFHAs), particularly along Marsh Creek, Sand Creek, Dry Creek, and Deer Creek corridors. Development in these zones requires a floodplain development permit, elevation certificate, and compliance with the city's floodplain management ordinance.
View full Brentwood rules →Oakley, CA
Contra Costa County
Large portions of Oakley lie within FEMA Special Flood Hazard Areas (SFHAs), including Zone AE (1% annual chance flood) along Marsh Creek, Dutch Slough, and Delta waterways, and Zone A in some areas. Structures in SFHAs must be elevated or floodproofed to at least 1 foot above base flood elevation (BFE) and flood insurance is mandatory for federally backed mortgages.
View full Oakley rules →Key Facts Comparison
| Fact | Brentwood | Oakley |
|---|---|---|
| - | - | |
| Fact | - | FEMA Zone AE widespread along Marsh Creek and Delta shoreline |
Highlighted rows indicate differences between cities.
Brentwood FAQ
Oakley FAQ
How do I find out if my home is in a flood zone?
Check FEMA's Flood Map Service Center (msc.fema.gov) with your address, or contact Oakley Community Development for a flood zone determination.
Do I need flood insurance?
Flood insurance is mandatory in Zones A and AE if you have a federally backed mortgage. Even in moderate-risk areas, it is strongly recommended.
Can I rebuild after a flood?
If damage is less than 50% of the pre-flood market value, you can repair without full elevation compliance. If 50% or more, the entire structure must be brought into compliance.
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