ADU rules in Greenville County, SC — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
In unincorporated Greenville County, one detached accessory dwelling unit is allowed alongside a principal home only in the AG (Agricultural Preservation) district. It cannot exceed 50% of the primary dwelling's square footage, must sit in a side or rear yard, and must share the primary home's driveway.
The Greenville County Zoning Ordinance permits a detached accessory dwelling with a principal single-family home in the AG, Agricultural Preservation District. Only one is allowed, and it must be no larger than 50% of the primary dwelling's gross square footage, located in the side and rear yards, meet the setback requirements of Article 7 (Tables 7.1 and 7.3), comply with all SC DHEC regulations, and share the primary dwelling's driveway. A manufactured home used as the accessory dwelling must meet the ordinance's manufactured-house conditions. Inside Greenville, Greer, Mauldin, Simpsonville, Travelers Rest, or Fountain Inn, the city's own zoning applies instead.
Building a second dwelling outside the AG district, or exceeding the 50% size cap, is a zoning violation enforced by Greenville County Planning and Code Compliance; correction or removal may be ordered.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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