San Francisco Building Inspection Commission Codes § 3107.3 Height, projection, and location

Height, projection and location of all signs shall be as specified in Article 6 of the San Francisco Planning Code. No sign shall project past the curbline of any street, alley or public way.

The minimum vertical clearance of signs over public sidewalks shall be 10 feet (3.048 m). Additionally, signs or portions within the outer one- third of a sidewalk shall have 12-foot (3.658 m) clearance, and when within 2 feet (0.61 m) of the curbline shall have 14-foot (4.267 m) clearance.

Roof signs shall be not less than 5 feet (1.524 m) above the roof. Supports shall be spaced at least 6 feet (1.829 m) apart.