Grading work in Lodi is regulated under California Building Code Appendix J (adopted by the city) and the Lodi Public Improvement Design Standards, which require permits, drainage plans that do not impact neighbors, and post-construction LID controls.
Lodi adopts the California Building Code, including Appendix J (Grading), which requires a grading permit for cuts/fills exceeding 50 cubic yards or for excavations deeper than 5 feet (with limited residential exemptions). The City of Lodi's 2019 Public Improvement Design Standards govern site drainage: lots must be graded so stormwater drains to an approved point of discharge (street gutter, storm drain inlet, or on-site retention) without sheet-flowing onto adjacent property. New developments subject to the Multi-Agency Post-Construction Standards must size on-site stormwater controls (bioretention, swales, permeable paving) per the MS4 permit. Grading near waterways is restricted because the Mokelumne floodway must remain capable of passing a 100-year storm.
Grading without a permit, or grading that diverts drainage onto neighboring property, is a code violation handled by Lodi's enforcement process: courtesy notice, Notice of Violation, then administrative citation. The owner may be required to regrade at their expense and restore the natural drainage pattern.
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