ADU rules in Guilford County, NC — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Guilford County allows accessory dwelling units (ADUs) on residential lots in unincorporated areas. You must first get zoning approval from Guilford County Planning & Development, then a building permit. An ADU needs its own kitchen, living area, bedroom, and bathroom and must meet the NC Residential Code.
The county permit-guidance page states ADUs — also called in-law units, granny suites, or cottages — are attached or detached dwellings accessory to the main house and must comply with the NC Residential Code. In unincorporated Guilford County you obtain zoning approval (use and setbacks) from Guilford County Planning and Development before applying for the building permit; inside a town or its ETJ, that town's planning department reviews it. Attached ADUs are permitted as a “Residential Building-Addition”; detached ADUs as “Residential Building-New Single Family-Detached.” Dimensional standards (setbacks, height, lot coverage) come from the zoning district in the Unified Development Ordinance. Watershed and soil-erosion review may also apply.
Building or occupying an ADU without zoning approval and a permit is a zoning/building-code violation subject to stop-work orders, daily civil penalties, and required removal or legalization.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Guilford County's adu rules rules stack up against other locations.
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