Accessory Structures in Chapel Hill, NC (2026)
5 verified accessory structures rules for Chapel Hill, North Carolina, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Chapel Hill's LUMO permits one accessory apartment per single-family lot in residential zoning districts. The Town Council adopted comprehensive LUMO amendments on January 21, 2026 that increased the maximum ADU size from 75 percent of the primary residence to a flat 1,000 sq ft, eliminated parking minimums for accessory apartments, and added flexibility to place ADUs on their own lot for separate sale (in eligible districts). Detached ADUs must be located in the established rear yard and meet the primary residence's side and rear setback requirements for the underlying zoning district. North Carolina has no statewide ADU mandate — HB 409 and HB 401 both failed in the 2024 NCGA.
Chapel Hill Accessory Apartment (ADU) Rules
Some RestrictionsShed Rules
Chapel Hill regulates sheds under the LUMO accessory-structure rules and the 2018 NC Residential Code. The 2018 NC Residential Code exempts one-story detached residential accessory structures up to 12 ft x 12 ft (144 sq ft) from a building permit when no plumbing, electrical, or mechanical systems are added. Sheds must meet the zoning district's setback requirements (look up via Chapel Hill's Zoning Lookup Tool — typically 14 ft from any property line in R-1, lower in higher-density districts). The combined area of all detached accessory structures cannot exceed 33 percent of the dwelling's heated square footage, and shed footprint counts toward the lot's impervious-surface-area cap.
Chapel Hill Shed Rules
Some RestrictionsGarage Conversions
Converting a Chapel Hill garage to habitable space requires a building permit and electrical permit from Chapel Hill Building and Development Services under the 2018 NC Residential Code (change of occupancy from U to R-3). If the conversion creates a kitchen and separate entrance, it becomes an accessory apartment under the LUMO — one per lot, post-January 2026 maximum size 1,000 sq ft, located in the established rear yard for detached units, with parking minimums eliminated in the January 21, 2026 LUMO amendments.
Chapel Hill Garage Conversion
Some RestrictionsCarport Rules
Chapel Hill regulates carports as accessory structures under the LUMO. Detached carports must meet the underlying zoning district's setbacks (28 ft street / 14 ft any other line in R-1; lower in higher-density districts) and count toward the 33 percent cap on combined detached accessory structures and toward the lot's impervious-surface cap. Construction requires a building permit through Chapel Hill Building and Development Services under the 2018 NC Residential Code with Orange County 115 mph basic wind speed engineering. Enclosing a carport into a garage triggers a new building permit and additional code requirements.
Chapel Hill Carport Rules
Some RestrictionsTiny Homes
A tiny home on a permanent foundation in Chapel Hill is treated as either a single-family dwelling (must meet the underlying zoning district's lot and setback standards) or an accessory apartment under the LUMO (post-January 2026 capped at 1,000 sq ft, located in the established rear yard for detached units, parking minimums eliminated). Tiny homes on wheels (THOWs) registered as RVs or park-model trailers are not permitted as residences in residential zoning districts. NC has not adopted IRC Appendix Q into the statewide residential code.
Chapel Hill Tiny Home Rules
Some RestrictionsLooking for Orange County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Chapel Hill city rules.
Accessory Structures in Orange County →