Chickens & Livestock: Brentwood vs Walnut Creek
How do chickens & livestock rules compare between Brentwood, CA and Walnut Creek, CA?
Brentwood has fewer restrictions than Walnut Creek.
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 →Walnut Creek, CA
Contra Costa County
Walnut Creek permits backyard chickens in most residential zones with typical limits of 4-6 hens per lot, coops set back at least 10-15 feet from property lines and 25 feet from neighboring dwellings, and roosters are prohibited in standard single-family zones.
View full Walnut Creek rules →Key Facts Comparison
| Fact | Brentwood | Walnut Creek |
|---|---|---|
| Residential limit | ~4-6 hens typical | - |
| Roosters | Prohibited in residential | Prohibited in standard residential |
| Coop setback (structures) | ~15-25 ft | - |
| Coop setback (property line) | ~5-10 ft | - |
| Ag zones | No hen limit, roosters OK | - |
| Typical max hens | - | 4-6 per residential lot |
| Coop setback | - | 10-15 ft property line |
| Coop setback from dwellings | - | ~25 ft neighboring homes |
| Slaughtering | - | Prohibited in residential zones |
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.
Walnut Creek FAQ
Can I have chickens in my Walnut Creek backyard?
Yes, most residential zones allow 4-6 hens as an accessory use. You must comply with coop setbacks, keep the enclosure clean and rodent-resistant, and cannot keep roosters in standard residential zones.
Can I sell eggs from my backyard hens?
Small-volume egg sales from the home are permitted under California's Cottage Food Operation rules (AB 1616) with registration through the county. Commercial-scale sales require additional licensing.
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