Sanger, CA Environmental Rules: Grading & Drainage (2026)

The City of Sanger requires grading permits for earthwork operations that exceed California Building Code thresholds. Grading permits are required for cuts exceeding 5 feet in depth, fills exceeding 3 feet, or earthwork involving more than 50 cubic yards. The Sanger Building Division reviews grading plans prepared by a licensed civil engineer or geotechnical engineer. All grading must be designed to direct surface drainage away from building foundations and toward approved drainage facilities. Finished grade around structures must slope a minimum of 2 percent away from the foundation for at least 6 feet. Concentrated drainage cannot be directed onto adjacent properties without proper easements. The city storm drain system has limited capacity, and developers may be required to construct on-site detention basins for larger projects. The flat topography of the San Joaquin Valley floor means drainage design is critical to prevent standing water and foundation damage. Sanger Public Works reviews drainage improvement plans for projects connecting to the public system. Compaction testing is required for all engineered fill, with a minimum 90 percent relative compaction for general fill and 95 percent under structures. The Sanger Engineering Division may require hydrology and hydraulic studies for projects affecting drainage patterns.