ADU rules in Pomona, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Pomona regulates ADUs under Zoning Code Section 830.A and Ordinance No. 4281. Detached ADUs up to 1,200 sq ft are allowed. No minimum lot size. Height up to 16 ft detached, 25 ft attached. 4-foot side/rear setbacks required.
Pomona's ADU standards are in Zoning Code Section 830.A, codified by Ordinance No. 4281 per Government Code Sections 65852.2 and 65852.22. Detached ADUs can be up to 1,200 sq ft; attached ADUs up to 50% of the primary dwelling or 1,200 sq ft, whichever is less. JADUs are limited to 500 sq ft. No minimum lot size is required. Detached ADUs can be up to 16 ft high; attached up to 25 ft. Height limits don't apply to conversions. Setbacks: 4 ft from side/rear property lines. Conversion ADUs and JADUs have no minimum setback. Parking: 1 space required unless within 1/2 mile of transit. Garage conversions don't require replacement parking. Fire sprinklers not required unless primary has them. ADUs under 750 sq ft are exempt from impact fees. 60-day permit review timeline.
Unpermitted ADUs are subject to code enforcement. Legalization provisions under AB 2533 apply to units built before January 1, 2020.
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Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle adu rules.
See how Pomona's adu rules rules stack up against other locations.
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