Garage conversion rules in Durham County, NC — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a Durham garage into living space usually creates an accessory dwelling under UDO Sec. 5.4.2. It must stay within the 1,200-square-foot cap, be one per lot, and meet the North Carolina Residential Code, with a City-County building permit.
Durham's joint City-County Unified Development Ordinance does not have a separate garage-conversion section; a garage turned into habitable quarters generally becomes an accessory dwelling under Section 5.4.2. That means the converted space is limited to one accessory dwelling per lot, may not exceed 1,000 heated square feet on a single story and 1,200 square feet total, and remains subordinate to the main house. No additional parking is required for the accessory dwelling. Because the new space is habitable, it must be brought up to the North Carolina Residential Code for egress windows, ceiling height, smoke and carbon-monoxide alarms, insulation, and electrical, verified through a Durham City-County building permit and inspection. Purely storage or workshop conversions that add no dwelling still
An unpermitted garage conversion is a building-code and UDO violation enforced by Durham City-County Inspections. Remedies include stop-work orders, civil penalties, mandatory permitting and inspection, or an order to restore the garage.
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