Brentwood, CA Home Business: Signage Rules (2026)
Key Facts
- Signs allowed
- None, complete prohibition
- Governing section
- § 17.840.008(H)
- Also banned
- Outdoor/window product displays
- Enforcement
- Permit revocation by CD Director
- Applies to
- Every home occupation permit holder
Summary
Brentwood bans all signage for home-based businesses outright. Municipal Code § 17.840.008(H) prohibits "the display of signs or advertising devices identifying the home occupation," along with any outside or window display of products, so a permit holder cannot post even a small placard advertising the business.
The following activities shall be prohibited in conjunction with any home occupation: ... ... H. The display of signs or advertising devices identifying the home occupation or any outside display or window display of materials or products;
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4604307; v5 updated 2025-12-09).
Full Breakdown
004 standards, no odor or waste emission, no commercial retail sales on the premises, no more than one commercial delivery vehicle under one-ton capacity, no exterior alteration of the dwelling, and no outdoor use of yard space for the business. Because the sign prohibition has no size, material, or duration exception written into the subsection, any visible identifier of the home business, from a yard sign to a vehicle magnet parked in view, falls outside what a home occupation permit allows in Brentwood.
Violations & Fines
The community development director may revoke the underlying home occupation permit "after notice and an administrative hearing" under § 17.840.006(D) if a permit holder posts prohibited signage. Continued unpermitted advertising can also draw the code's general misdemeanor/infraction penalties under § 1.20.010, which runs $100 to $500 in escalating infraction fines with each day counted as a separate violation.
Frequently Asked Questions
Can I put a small sign in my yard advertising my home-based business?
What about a display in my front window?
What happens if I post a sign anyway?
Does this rule apply to every type of home business?
Sources & Official References
Other rules in Brentwood
California rules heatmap·Compare Brentwood to another location·View the California home business overview
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Signage Rules in Nearby Cities
How other cities in Contra Costa County handle signage rules.