Raleigh

Wake County portion

ADU Pass helps homeowners in Raleigh, Wake County, North Carolina navigate the permit paperwork for building an accessory dwelling unit. This area covers 15 ZIP codes.

15 ZIP codes

ADU details

ADU legality: allowed-with-restrictions

Statewith-restrictions (North Carolina accessory-dwelling framework) — North Carolina statewide ADU posture per state-adu-research file.
Countyallowed (Wake County unincorporated zoning) — Wake County permits ADUs in unincorporated areas under state-law-aligned standards. Within Raleigh city limits the city ordinance plus state law govern.
Cityallowed (City of Raleigh Municipal / Zoning Code — Accessory Dwelling Units) — City of Raleigh permits ADUs under the local ordinance aligned with North Carolina statewide framework where applicable. Wake County seat; North Carolina state capital; Research Triangle.

North Carolina partially preempts local ADU restrictions; cities retain authority over design and setbacks. Raleigh permits ADUs subject to local conditions per its zoning ordinance.

Cost scenarios

ScenarioSq ft PermitBuildTotal
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
Plan review$510
Building permit$935
Impact fees$255
Total$1,700

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. Raleigh 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: Raleigh Water Utility · 30d connect · $4,500
  • Sewer: Raleigh Sewer / Wastewater · 30d connect · $5,500
  • Electric: Raleigh Electric Utility · 21d connect · $1,800
  • Gas: Raleigh Gas Utility · 30d connect · $1,500

Property values & taxes

Median value$425,000
Median tax$3,613/yr
Effective rate0.8%

Construction timeline

Detached build22 weeks
Conversion12 weeks
Contractor lead4 months

Realistic total: best 7mo · typical 11mo · worst 16mo

Financing

Fannie Mae ADUeligible

Insurance impact

Annual premium delta$420
Landlord policyrecommended
Umbrella threshold$1M umbrella when renting

HOA prevalence & preemption

State HOA preemptionno

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

IECC climate zone3A
Heating degree days2,800
Cooling degree days2,000
Design low / high18°F / 94°F
Frost depth8"
Design snow load10 psf
Wind design speed130 mph
Seismic design cat.B
Annual rainfall54"
Wildfire exposurelow
Energy codeIECC
Version / adopted2018 / 2020

Building code

Base codeIRC
Version year2,018
Adopted2020
Fire sprinklernone
Egress window5.7 sqft min
Min ceiling7 ft
Attic R-valueR-38 min
Wall R-valueR-13 min

Amendments:

  • Amendment
  • Amendment
Wake County — county ADU rules and overlays

County ADU ordinance

Wake County (state-capital county; ~1,170,000 residents — North Carolina's most populous county; encompassing Raleigh, Cary partial, Apex, Holly Springs, Fuquay-Varina, Garner, Knightdale, Wake Forest, Wendell, Zebulon, Morrisville partial, Rolesville, Angier partial, and unincorporated tracts in eastern, southern, and western Wake County) regulates land use in unincorporated areas through the Wake County Unified Development Ordinance (UDO), administered by the Wake County Department of Planning, Development and Inspections. North Carolina has no statewide ADU preemption — North Carolina's stateAduLaw is netEffect 'no-statewide-law' — though SB 308 (2023, did not pass) and SB 174 (2025) have attempted to introduce statewide standards. The Wake County UDO permits 'accessory residential dwelling units' in agricultural and large-lot residential districts (R-30, R-40, R-80, R-A) by right on parcels meeting size minimums, subject to size limits (commonly 1,200 sq ft or 50% of principal dwelling), one-per-lot limit, and parking. Smaller residential districts treat ADUs as conditional uses requiring Board of Adjustment approval. The Wake County Board of Commissioners updated the UDO most recently in 2024.

County regulatory overlays

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

  • 27601
  • 27603
  • 27604
  • 27605
  • 27606
  • 27607
  • 27608
  • 27609
  • 27610
  • 27612
  • 27613
  • 27614
  • 27615
  • 27616
  • 27617

Post Office

  • 1 Floretta Pl Rm 208, 27676
  • 2100 Lake Dam Rd, 27606
  • 236 Sunnybrook Rd, 27610
  • 2777 Brentwood Rd, 27604
  • 311 New Bern Ave, 27601
  • 6508 Hilburn Dr, 27613
  • 7800 Falls Of Neuse Rd, 27615
  • 806 Oberlin Rd, 27605

Locale Names