Oakland, CA Sign Regulations: Window Signs (2026)

Oakland's Planning Code caps window signage in its commercial corridors under Chapter 17.104, General Limitations on Signs. Section 17.104.020(K) states that window signs may not cover more than twenty-five percent of any single window, and any sign placed in that 25% counts against the property's overall aggregate sign area limit set in Subsection 17.104.020(B). That aggregate limit is one square foot of sign area per foot of lot frontage on an interior lot, half that on a corner lot, capped at 200 square feet total in Commercial Zones and the RU-4/RU-5 Zones, or 300 square feet in Industrial Zones.

Businesses wanting more coverage inside their windows without hitting that cap have one out: Subsection K exempts interior signs positioned eighteen inches or more behind the window face, since those read as displays rather than exterior advertising. Before any Business, Civic, or Residential Sign, including a window sign that changes the building's exterior appearance, is installed or altered, Subsection 17.104.020(A) requires Design Review approval under Chapter 17.136. Temporary window signage is handled separately under Subsection J: a grand-opening sign can stay up for thirty days, and special-event signs are allowed up to four times a year for five consecutive days each, with removal required once the time limit runs. A parallel set of aggregate-area limits applies in the S-1, S-3, D-CO-1, and S-15 Zones under Section 17.104.030.