Zoning Restrictions: Castro Valley vs San Leandro
How do zoning restrictions rules compare between Castro Valley, CA and San Leandro, CA?
Castro Valley and San Leandro have similar restriction levels.
Castro Valley, CA
Alameda County
Unincorporated Alameda County allows home occupations in residential zones as accessory uses, subject to the county zoning ordinance limits on scale, appearance, and off-site impacts under Title 17.
View full Castro Valley rules →San Leandro, CA
Alameda County
San Leandro permits home occupations with a Home Occupation Permit and business license. Use must remain incidental to the residence and generate no nuisance.
View full San Leandro rules →Key Facts Comparison
| Fact | Castro Valley | San Leandro |
|---|---|---|
| Governing code | Alameda County General Ordinance Code Title 17 (Zoning) | - |
| Allowed zones | Residential zones as accessory use | - |
| Character test | Must remain incidental to residence | - |
| Exterior changes | No visible alteration permitted | - |
| Jurisdiction | Unincorporated areas only | - |
| Permit | - | Home Occupation Permit |
| Business License | - | Required |
| Area | - | ~25% of dwelling |
| Employees | - | Residents only |
| Prohibited | - | Auto repair, mfg |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
Does this apply inside incorporated cities?
No. Each city (Oakland, Hayward, Fremont, etc.) has its own zoning code. County rules apply only to unincorporated Alameda County.
Can I run a business from a detached garage or ADU?
Only if the accessory structure is permitted and the use complies with all home occupation standards in Title 17.
San Leandro FAQ
Do I need a permit for a home-based consulting business in San Leandro?
Yes. A Home Occupation Permit and city business license are required even for low-impact businesses like consulting.
Who enforces this in San Leandro?
San Leandro code enforcement at (510) 577-3394 handles most complaints. Alameda County agencies handle regional issues.
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