Accessory Structures in Apex, NC (2026)
5 verified accessory structures rules for Apex, North Carolina, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Apex UDO Sec. 4.5.6 permits one Accessory Apartment per single-family lot. Attached accessory apartments have no size limit. Detached accessory apartments are capped at 40 percent of the principal dwelling's heated square footage (50 percent or 1,000 sq ft, whichever is smaller, inside the Small Town Character Overlay District). Common ownership with the principal dwelling is required in residential zones. North Carolina has no statewide ADU mandate — HB 409 and HB 401 failed in the 2024 General Assembly.
Apex Accessory Apartment (ADU) Rules
Some RestrictionsShed Rules
Apex UDO Sec. 5.2.7.E sets a 5 ft minimum side and rear setback for sheds in residential districts. Sheds 12 ft x 12 ft (144 sq ft) or smaller are exempt from the UDO Sec. 4.5.3.B 'matching materials' requirement that otherwise applies to accessory structures. Sheds and other accessory structures must sit behind the principal building unless located at least 60 ft from the front property line (UDO Sec. 5.2.7.B.2). The 2018 NC Residential Code exempts one-story detached residential accessory structures up to 12 ft x 12 ft from a building permit.
Apex Shed Rules
Few RestrictionsGarage Conversions
Converting an Apex garage to habitable space requires a building permit and electrical permit from Apex Building Inspections 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 UDO Sec. 4.5.6 — one per lot, detached capped at 40 percent of the principal dwelling's heated square footage, common ownership required in residential zones.
Apex Garage Conversion
Some RestrictionsCarport Rules
Apex UDO Sec. 5.2.7.E lists unattached carports as accessory structures with a 5 ft minimum setback from side or rear property lines. The carport must sit behind the principal building unless located at least 60 ft from the front property line (Sec. 5.2.7.B.2). Construction requires a building permit through Apex Building Inspections under the 2018 NC Residential Code with engineered wind-uplift anchorage. Carports in residential zones must use materials similar to the main dwelling unless 12 ft x 12 ft or smaller.
Apex Carport Rules
Few RestrictionsTiny Homes
A tiny home on a permanent foundation in Apex is treated as either a single-family dwelling (must meet the underlying zoning district's lot and setback standards) or an Accessory Apartment under UDO Sec. 4.5.6 (capped at 40 percent of the principal dwelling's heated square footage for detached units). Tiny homes on wheels (THOWs) registered as RVs or park-model trailers are not permitted as residences in residential zoning districts. Manufactured homes are permitted only in MH and MHP districts.
Apex Tiny Home Rules
Some RestrictionsLooking for Wake County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Apex city rules.
Accessory Structures in Wake County →