Garage conversion rules in Erie County, NY — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a garage to living space is a zoning and building matter handled by your Erie County town, city, or village, not the county. A permit and Uniform Code compliance are required, and local zoning controls whether the new use is allowed.
Erie County has no countywide ordinance governing garage conversions. Turning an attached or detached garage into habitable space (a bedroom, in-law suite, or ADU) is regulated by your municipality's zoning code and the NYS Uniform Code, enforced by your local code-enforcement officer. Because a converted garage becomes habitable space, it must meet Residential Code (RCNYS) standards for room size, ceiling height, light, ventilation, egress windows in sleeping rooms, and smoke and carbon-monoxide alarms. Local zoning separately controls whether a garage may be converted, whether off-street parking must be preserved, and whether the unit counts as a permitted ADU. A municipal building permit is required; the county issues none. Confirm requirements locally, since an unpermitted conversion is hard to legalize.
An unpermitted garage conversion is a local code-enforcement matter handled by your municipality. Remedies include a stop-work order, a required retroactive permit, fines, or an order to restore the garage. Erie County does not enforce these rules.
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