Sign Regulations in Brentwood, CA (2026)
4 verified sign regulations for Brentwood, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Political Signs
Political signs on private property in Brentwood are treated the same as other non-commercial yard signs under the city's content-neutral sign ordinance. State law limits the city's ability to restrict election-related signage. Political signs on public property or in the right-of-way are prohibited.
Signs: Political Signs
Heavy RestrictionsCal. Civ. Code § 4710
4710. (a) The governing documents may not prohibit posting or displaying of noncommercial signs, posters, flags, or banners on or in a member’s separate interest, except as required for the protection of public health or safety or if the posting or display would violate a local, state, or federal law. (b) For purposes of this section, a noncommercial sign, poster, flag, or banner may be made of...
Garage Sale Signs
Brentwood allows one on-site garage sale sign per residence and up to four off-site directional signs per sale, capped at 3x3 feet, displayed only on weekends and holidays and removed the same day the sale ends.
Brentwood Garage Sale Sign Rules: 1 On-Site, 4 Off-Site
Some RestrictionsBrentwood Municipal Code §§ 17.640.006(A)(1)(c), 17.645.006(C)
c. Garage sale signs, provided the following: i. Total dimensions including support stake or pole not to exceed three feet in height by three feet in width. ii. For each garage sale type event, no more than one sign may be displayed on-site and no more than four signs may be displayed off-site, in accordance with Chapter 17.645. iii. Signs may be displayed on weekends and legal holidays only an...
Digital Billboards
Brentwood outright prohibits new billboards and animated or electronic message signs. City code declares banning billboards a fundamental land use policy and lists animated signs, which include digital displays, among prohibited signs citywide.
Brentwood Bans New Billboards, Digital Signs
Heavy RestrictionsBrentwood Municipal Code §§ 17.640.003(H), 17.640.004, 17.640.009(P)-(R), 17.640.010
H. Billboard Policy. New billboards, as defined herein, are prohibited. It is a fundamental land use policy of the city to completely prohibit the construction, erection or use of any and all billboards, other than those which legally exist in the city, or for which a valid permit has been issued and has not expired ... "Animated sign" means a sign on which the visual image changes more frequen...
Window Signs
Nonresidential temporary window signs in Brentwood cannot cover more than 25% of a store's aggregate window area and can be displayed only seven cumulative days per month per business, with no permit needed if the limits are met.
Brentwood Window Sign Limits: 25% and 7 Days
Some RestrictionsBrentwood Municipal Code § 17.640.005(N)
N. Temporary window signs, limited to a cumulative display period of seven days per month, per establishment. Maximum sign copy area shall not exceed more than twenty-five percent of the aggregate window area. Signs shall not be allowed within an area located between three feet and five feet above grade.
Looking for Contra Costa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Brentwood city rules.
Sign Regulations in Contra Costa County →