Chickens & Livestock: Brentwood vs Oakley
How do chickens & livestock rules compare between Brentwood, CA and Oakley, CA?
Brentwood has fewer restrictions than Oakley.
Brentwood, CA
Contra Costa County
Backyard chickens are permitted in Brentwood on most residential lots, with limits commonly of 4-6 hens, no roosters, and coop setbacks from neighboring structures. Agricultural-zoned parcels have no hen limit. Under BMC Title 17, coops must be kept sanitary and meet setback requirements from property lines.
View full Brentwood rules →Oakley, CA
Contra Costa County
Oakley generally allows up to six hens on single-family residential lots with coop setbacks of 10–20 feet from property lines and the main dwelling. Roosters are prohibited in standard residential zones, consistent with Oakley's transition from rural to suburban while preserving backyard farming traditions.
View full Oakley rules →Key Facts Comparison
| Fact | Brentwood | Oakley |
|---|---|---|
| Residential limit | ~4-6 hens typical | - |
| Roosters | Prohibited in residential | Prohibited in residential |
| Coop setback (structures) | ~15-25 ft | - |
| Coop setback (property line) | ~5-10 ft | - |
| Ag zones | No hen limit, roosters OK | - |
| Hen limit | - | Up to 6 hens typical |
| Property line setback | - | ≈ 10 ft |
| Residence setback | - | ≈ 20 ft |
| HOA check | - | Often stricter |
Highlighted rows indicate differences between cities.
Brentwood FAQ
Can I have a rooster in Brentwood?
Not in residential zones. Roosters are only permitted on parcels zoned A (Agricultural). In residential areas, roosters are considered a noise nuisance under BMC Chapter 9.32 and Title 17.
Do I need a permit for a chicken coop?
A building permit is required for coops over 120 sq ft (standard accessory structure threshold). Smaller coops don't need a building permit but still must meet zoning setback requirements.
Oakley FAQ
Can I keep ducks or quail instead of chickens?
Ducks, quail, and other domestic poultry are generally permitted under similar limits and coop rules. Peafowl and geese are often restricted due to noise.
Do I need a permit for a backyard coop?
A small, detached coop typically does not require a building permit if under 120 sq ft, but must meet zoning setbacks. Larger structures need permits.
What if my HOA bans chickens?
HOA rules can be stricter than city code. If you are in an HOA subdivision, review your CC&Rs before establishing a coop.
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