ADU Pass
Durham
Durham County portion
Also in: No County
ADU Pass helps homeowners in Durham, Durham County, North Carolina navigate the permit paperwork for building an accessory dwelling unit. This area covers 8 ZIP codes.
Map
ADU details
ADU legality: allowed-with-restrictions
North Carolina partially preempts local ADU restrictions; cities retain authority over design and setbacks. Durham permits ADUs subject to local conditions per its zoning ordinance.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 150 | $1,700 | $36,750 | $38,450 |
| 600 | 600 | $1,700 | $147,000 | $148,700 |
| midpoint | 575 | $1,700 | $140,875 | $142,575 |
| maximum | 1,000 | $1,700 | $245,000 | $246,700 |
Fee breakdown
Viability (permitted uses)
- Long-term rental: yes Long-term rental of ADU generally permitted; landlord-tenant law and any city rental-registration ordinance apply.
- Short-term rental: with-restrictions STR rules vary by city. Durham regulates STRs separately from ADU permitting; check local STR ordinance and HOA covenants.
- Office rental: with-restrictions Detached office rental requires home occupation permit or rezoning.
- Home office: yes Home occupation permitted with restrictions on signage and customer traffic.
- Studio / workshop: yes Personal artist studio is a permitted accessory use.
- Agriculture: with-restrictions Limited urban agriculture permitted in residential zones; livestock varies by district.
- Relative support: yes Family-occupancy ADU explicitly permitted in single-family zones.
Utilities
- Water: Durham Water Utility · 30d connect · $4,500
- Sewer: Durham Sewer / Wastewater · 30d connect · $5,500
- Electric: Durham Electric Utility · 21d connect · $1,800
- Gas: Durham Gas Utility · 30d connect · $1,500
Property values & taxes
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 16mo
Financing
Insurance impact
HOA prevalence & preemption
North Carolina has no statute that voids HOA bans on ADUs. The North Carolina Planned Community Act (G.S. Chapter 47F) governs planned communities created on or after January 1, 1999 and the NC Condominium Act (Chapter 47C) governs condominiums; neither contains an ADU carve-out. Restrictive covenants in declarations and bylaws — including those prohibiting accessory structures, secondary kitchens, or short-term rentals — remain enforceable per their terms. SB 495 / HB 627 (pending) is silent on HOA preemption; even if enacted as currently drafted it would preempt local-government zoning but not private restrictive covenants.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
Legal history (timeline)
Current ordinance: City of Durham Municipal Code — Accessory Dwelling Units, adopted 2020-01-01, last amended 2024-04-01
- 2024-01-01 — City of Durham ADU code refresh (city-ordinance)
Conforming local-code amendments aligning with current North Carolina accessory-dwelling framework.
Effect: Codified permissive ADU standards consistent with state law and local zoning.
Durham County — county ADU rules and overlays
County ADU ordinance
Durham County, NC (333,000 residents including the City of Durham) operates the City-County Joint Planning Department. The Durham Unified Development Ordinance (UDO) governs zoning across both the city and the county. ADUs (the UDO uses "accessory dwelling unit") are permitted in many residential districts subject to size, lot, and setback conditions.
State-floor overlay: NC Ch. 160D framework.
County regulatory overlays
Durham County administers flood-hazard, and (where mapped) coastal, wildland-fire, historic, and airport overlays that shape ADU project feasibility. The most consistent overlay across the county is FEMA NFIP floodplain regulation; other overlays apply to specific geographies inside the county.
- FEMA NFIP Special Flood Hazard Areas in Durham County — A new ADU in a mapped SFHA must be elevated to or above the Base Flood Elevation; cost impact on the project is often material.
- Historic districts and individually-listed historic resources
County permitting (unincorporated parcels)
Durham County issues building permits for parcels in unincorporated territory through its development services / planning department, with separate review tracks for zoning conformance, building-code compliance, on-site sewage where applicable, floodplain compliance, and addressing. Inside incorporated municipalities, city departments handle their own permits; the county's authority is geographically limited to unincorporated territory. An ADU permit application is typically processed as a residential building permit with a zoning verification step against the county's ordinance for the parcel's zoning district.
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Codes
- 27701
- 27703
- 27704
- 27705
- 27707
- 27709
- 27712
- 27713
Post Office
- 1100 N Miami Blvd, 27703
- 1801 Fayetteville St, 27707
- 311 Milton Rd, 27712
- 3500 N Roxboro St Ste 30, 27704
- 3520 Kangaroo Dr, 27705
- 3710 Shannon Rd, 27707
- 65 Tw Alexander Dr, 27709