Building Setbacks & Zoning in Ontario, CA (2026)
3 verified building setbacks & zoning rules for Ontario, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Setback Rules
Ontario single-family zones require a 20-foot front setback, 5-foot side yards (15-foot street side), and 20-foot rear setback under OMC Chapter 9 (Zoning), with reductions allowed for ADUs per Government Code 65852.2.
Ontario Setback Requirements
Some RestrictionsStructure Height Limits
Ontario caps single-family homes at 35 feet or 2 stories under OMC Chapter 9, and land near ONT International Airport triggers FAA Part 77 height review for anything over 200 feet or within the runway-protection zone.
Ontario Building Height Limits
Some RestrictionsLot Coverage Limits
Ontario single-family lots are limited to about 40 to 50 percent building coverage under OMC Chapter 9, with additional impervious-surface restrictions tied to the San Bernardino County MS4 stormwater permit.
Ontario Lot Coverage Limits
Some RestrictionsLooking for San Bernardino County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Ontario city rules.
Building Setbacks & Zoning in San Bernardino County →