Zoning Restrictions: El Cerrito vs Martinez
How do zoning restrictions rules compare between El Cerrito, CA and Martinez, CA?
El Cerrito and Martinez have similar restriction levels.
El Cerrito, CA
Contra Costa County
Home occupations in unincorporated Contra Costa require a Home Occupation Permit under Ordinance Code 82-4.242. The business must be secondary to the residential use, conducted entirely within the dwelling, use no more than 25% of the floor area, and generate no customer traffic, outside employees, or external evidence of commercial activity.
View full El Cerrito rules →Martinez, CA
Contra Costa County
Home businesses in Martinez are allowed in residential zones (R-1, R-2, R-3 and similar) through a Home Occupation Permit, provided they meet performance standards preserving residential character. Certain uses — retail, manufacturing, vehicle repair, and high-traffic operations — are prohibited regardless of compliance.
View full Martinez rules →Key Facts Comparison
| Fact | El Cerrito | Martinez |
|---|---|---|
| Authority | County Ord. Code Ch. 82-4 | - |
| Max floor area | 25% of dwelling | - |
| Customer visits | None allowed by default | - |
| Outside employees | Prohibited | - |
| Cottage food/MEHKO | Allowed with registration | - |
| - | - |
Highlighted rows indicate differences between cities.
El Cerrito FAQ
Can I run an online consulting business from my home?
Yes. Purely online businesses with no customer visits, no employees, and no external impact qualify as permissible home occupations with a Home Occupation Permit.
Can I see clients in my home for therapy or tutoring?
Generally no—client visits are prohibited under Ch. 82-4. Certain professional home offices may obtain a conditional use permit but approvals are case-by-case.
Martinez FAQ
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