Ontario requires a grading permit under OMC Title 6 for any earthwork over 50 cubic yards or cuts and fills deeper than 3 feet, with geotechnical review for projects over 500 cubic yards.
Under Ontario Municipal Code Title 6 and California Building Code Appendix J (Grading), a grading permit is required for excavation, fill, or combined earthwork exceeding 50 cubic yards, any cut or fill deeper than 3 feet, or any fill placed on a slope steeper than 3:1. Grading plans must be prepared by a California-licensed civil engineer, include a drainage study showing positive drainage away from structures at 2 percent minimum, and demonstrate that post-project runoff does not exceed pre-project flows. Projects over 500 cubic yards require a geotechnical soils report addressing expansive soils and liquefaction (Ontario is in a California Seismic Hazard Zone). All grading sites must comply with SCAQMD Rule 403 (Fugitive Dust) including watering three times daily or use of soil stabilizers. Retaining walls over 4 feet from bottom of footing to top of wall require a separate building permit. Final grading certification from the engineer of record is required before occupancy.
Contact your local code enforcement office for specific penalty information.
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Ontario, CA
Ontario Municipal Code section 5-29.14 prohibits operating any motor vehicle in a condition that creates excessive, impulsive or intrusive noise, including e...
Ontario, CA
Outdoor music is regulated under OMC Title 5 Chapter 29 and the special-event permit process. Venues and events with amplified sound need a city permit; resi...
Ontario, CA
No Ontario-specific ordinance directly regulates aircraft noise; the City's noise chapter exempts activities preempted by state or federal law (OMC 5-29.06(h...
Ontario, CA
Ontario prohibits razor wire on any wall or fence citywide, and bans barbed wire and electrified fences in residential, commercial, and residential mixed-use...
Ontario, CA
Every wall, fence, and gate in Ontario is subject to Planning Director design review regardless of whether a building permit is needed. A building permit is ...
Ontario, CA
Ontario fence requirements include zoning-based heights, setbacks, sight triangles, buffer walls on industrial edges, and CBC structural standards. Pool, ret...
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