ADU rules in Rochester, NY — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Rochester has been expanding ADU allowances as part of zoning reform efforts. Accessory dwelling units may be permitted in certain residential districts. ADUs must meet building code standards for habitable space and comply with size and setback requirements.
Rochester has been working to expand housing options through ADU allowances in residential zones. ADUs may be created within existing structures, as additions, or as detached buildings. They must meet all building code requirements for habitable space, including bedroom egress, plumbing, electrical, and HVAC. Parking requirements may apply. ADUs cannot be sold separately from the principal dwelling. A building permit is required.
Unpermitted ADUs face stop-work orders and removal or legalization requirements. Fines of $500–$2,000 apply for unpermitted construction. Properties with illegal ADUs may face title issues at sale.
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See how Rochester's adu rules rules stack up against other locations.
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