Grading and drainage work in San Francisco requires permits from the Department of Building Inspection (DBI). The Public Works Code and Building Code regulate excavation, fill, and site drainage to prevent property damage and protect infrastructure.
A grading permit is required for excavation or fill exceeding specified thresholds. Site drainage must be directed to the combined sewer system or managed on-site per SFPUC requirements. Projects cannot increase runoff to adjacent properties. Geotechnical reports are required for projects on steep slopes or in areas with known soil instability. The city enforces strict requirements in hillside areas to prevent landslides.
Grading without a permit is a misdemeanor. DBI can issue stop-work orders and require restoration of improperly graded sites. Administrative penalties apply for unauthorized grading or improper drainage.
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See how San Francisco's grading & drainage rules stack up against other locations.
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