Greensboro, NC Accessory Structures: ADU Permits (2026)

Greensboro adopted its current Land Development Ordinance (LDO) in 2010 with subsequent amendments addressing accessory dwelling units. LDO Section 30-8-11.2 governs ADU standards, located within Article 8 (Accessory Uses and Structures). ADUs are permitted in residential zoning districts where single-family dwellings are allowed, including R-3, R-5, R-7, and certain RM (multi-family) districts. Key dimensional standards: (1) The heated floor area of the ADU may not exceed 50% of the heated floor area of the primary dwelling; (2) The minimum-size requirement was removed in a prior amendment, so no floor; (3) Only one ADU per lot; (4) Detached ADUs must comply with accessory-structure setbacks under LDO Sec. 30-8-11 (typically 5 ft side/rear, behind the front building line); (5) Maximum height generally tied to the principal structure or 25 ft for accessory buildings. Permits are issued by Greensboro Engineering and Inspections Department (300 W. Washington St) under NC General Statute 160D-1110, which requires separate building, electrical, plumbing, and mechanical permits. Applicable codes are the 2018 NC Residential Code, 2018 NC Plumbing, Mechanical, and Fuel Gas Codes. A building permit is required for any accessory structure over 12 ft in any dimension. Historic district overlays (College Hill, Fisher Park, Aycock, etc.) require Historic Preservation Commission Certificate of Appropriateness before permits issue.