Reno, NV Environmental Rules: Grading & Drainage (2026)

Reno Municipal Code and the adopted International Building Code Appendix J regulate grading, excavation, and drainage. A grading permit is required when cut or fill exceeds 50 cubic yards, or for any grading on slopes steeper than certain gradients, or within hillside overlay zones regardless of quantity. Grading plans must be prepared by a licensed civil engineer for larger projects and must show existing and proposed grades, drainage patterns, erosion control BMPs, and compliance with hillside standards if applicable. Drainage from one property may not be concentrated or redirected to adversely affect neighboring properties under Nevada common law and Reno code. New developments must manage the increase in runoff from impervious surfaces through on-site detention, retention, or low-impact development features. Hillside overlay zones in west Reno impose additional constraints including maximum cut and fill heights (typically 10 feet), contour grading to mimic natural topography, and native revegetation requirements.