Garage conversion rules in Buffalo, NY — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions to habitable space or ADUs are allowed in Buffalo with a building permit, Certificate of Occupancy amendment, and compliance with egress, insulation, and ceiling-height rules. Historic districts require extra review.
Buffalo Green Code treats garage conversions as a change of use. Applicants must submit plans to Permit and Inspection Services showing compliance with NYS Residential Code: minimum 7-foot ceiling height, insulation to current energy code (R-20 walls, R-49 ceilings), egress window in each sleeping room, smoke and CO alarms, and proper heating. A new Certificate of Occupancy is required to reflect the added living space, and on-site parking replacement may be required if the garage served as off-street parking. In locally designated historic districts, the Preservation Board must sign off, particularly on streetside door or window changes. Unauthorized conversions are a common Buffalo violation because of the citys aging detached-garage stock.
Unpermitted conversion: stop-work, fines up to 500 dollars per day, and mandatory restoration or legalization. Missing CofO updates void property insurance in many cases.
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