ADU Pass
Wake County
ADU Pass helps homeowners in Wake County, North Carolina navigate the permit paperwork for building an accessory dwelling unit. We cover 13 cities and 34 ZIP codes in this county.
Map
County ADU details
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 assessor
Assessment policy: Wake County Tax Administration assesses real and personal property under N.C.G.S. § 105-273 et seq. North Carolina uses 100% market-value assessment with octennial revaluation (every 8 years) under N.C.G.S. § 105-286, though counties may revalue more frequently; Wake County revalued in 2024 and is on a 4-year cycle. New ADU construction is reassessed at market value as of January 1 following completion. North Carolina's homestead exemption for elderly and disabled (N.C.G.S. § 105-277.1) provides exclusion of the greater of $25,000 or 50% of appraised value (income-qualified). An ADU rented separately may carve out a non-homestead component.
County overlays (4)
Known county issues (3)
- other — Strong demand-side ADU economics, with rental absorption robust. Permit timelines have lengthened 1-3 months at peak demand.
- other — ADU economics in north Wake (Falls Lake watershed) are constrained by BUA accounting; pre-permit watershed analysis is essential.
- other — Most Wake County ADU activity flows through Raleigh's expanded city-tier framework; unincorporated Wake County rules are more conservative.
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.