Home Business in Castro Valley, CA (2026)

3 verified home business rules for Castro Valley, California, sourced directly from the municipal code and official government pages.

Verified from official government sources

Signage Rules

Castro Valley home businesses may not have any exterior signage in residential districts beyond a small (typically 1 sq ft) name/address plate per Alameda County Code §17.52.520. No illuminated, projecting or off-premises signs are allowed.

Castro Valley Home Business Signage

Heavy Restrictions

Full ordinance details →Official source ↗

Looking for Alameda County county-wide rules?

County ordinances apply to unincorporated areas and may supplement Castro Valley city rules.

Home Business in Alameda County →