Building permits, zoning and septic rules in New Hanover County, North Carolina

New houses in New Hanover County require building permits, with separate trade, zoning and plan-review requirements depending on the project¹. Most other construction also needs a building permit; ask Building Safety about project-specific exceptions^2,9. A narrow state exception covers qualifying work costing $40,000 or less but excludes listed structural, plumbing-design, heating, cooling, electrical, roofing-addition and Fire Code work¹⁰. New Hanover County enforces the statewide North Carolina State Building Code¹¹. The 2018 code remains effective statewide; the 2024 code may be used in its entirety but is not mandatorily effective, so confirm the code path with Building Safety¹². Residential new-construction building permit fees are $0.441 per square foot under roof, with a $400 minimum⁸. Permitted work requires inspections in the prescribed order through COAST; an upfit cannot receive a certificate of occupancy until all final inspections are approved^2,13.

New Hanover County Building Safety handles building permits and inspection scheduling⁹. Inside Wilmington, the county also issues building permits, while septic and private-well oversight remains with county On-Site Water Protection^4,14. Reach the division at 230 Government Center Drive, Wilmington, North Carolina 28403, by phone at 910-798-7311 or email at coast@nhcgov.com⁹. Building applicants use COAST to choose the applicable permit type, complete the requested information and submit; required fees and inspections depend on the permit type¹⁵. On-Site Water Protection also directs septic and well applicants to COAST¹⁶.

New Hanover County zoning applies to unincorporated land under the Unified Development Ordinance; Wilmington and Kure Beach administer their own zoning, while septic and private-well oversight stays with county On-Site Water Protection^3,4,17,18. County lot size, building placement, height, coverage and allowed uses depend on the district, so ask Current Planning & Zoning for the parcel’s applicable standards^5,15,19. Performance Residential Developments follow separate standards rather than the district’s minimum lot size, width and front, rear and side setbacks⁵. County pools under 600 square feet may sit 5 feet from side and rear property lines; larger pools follow district setbacks, measured to the in-ground pool depression rather than its surrounding slab¹⁹. One detached accessory apartment may be permitted by right where allowed, subject to district and use standards⁵. We could not confirm a general minimum dwelling size; ask Current Planning & Zoning¹⁹.

New Hanover County Environmental Health's On-Site Water Protection program oversees septic systems and private drinking-water wells⁴. Apply through COAST; the program provides site evaluations, permits, construction inspections and well-water testing¹⁶. State law requires an Improvement Permit and Construction Authorization before constructing, locating, relocating, installing or repairing a wastewater system, subject to its permit options and exceptions²⁰. The county’s fee schedule effective July 2026 lists a $400 septic Improvement Permit, a $200 construction authorization for listed system types and a $50 repair permit²¹. A required installation or repair inspection precedes use, and the county separately lists a $200 existing-system inspection for reuse or an addition^21,22. Only about 1.4% of county soils lack severe limits for a conventional drain field, so obtain the site evaluation before fixing the house location or budget²³.

In unincorporated New Hanover County, an RV or travel trailer may be used as a dwelling only in an approved campground or RV park, unless it qualifies as permitted Temporary Relocation Housing⁵. Parking an RV in an approved parking space or residential driveway is not itself prohibited, but parking does not authorize dwelling use⁵. North Carolina accepts tiny homes as permanent single-family dwellings when the local building official permits them and they meet the applicable code, zoning, setback and sanitation requirements⁷. We could not confirm a separate tiny-home occupancy rule for unincorporated New Hanover County; ask Current Planning & Zoning about the parcel's district and proposed dwelling use^15,19. A portable toilet cannot replace permanent sanitation where the state building code requires a permanent connection²⁴.

1. Ask Current Planning & Zoning to confirm jurisdiction, district, allowed use and dimensional standards for unincorporated land^3,15.
2. If dividing land, complete subdivision review covering lots, access, streets, utilities, water supply and stormwater drainage¹⁹.
3. Obtain On-Site Water Protection’s site evaluation and required septic approvals^4,20.
4. Before development in an unincorporated Special Flood Hazard Area, apply to the Floodplain Administrator with a scaled plot plan, flood boundaries, utility-protection details and documentation of other required approvals; coastal work may also need a CAMA permit^5,25.
5. Submit the building application through COAST and pay applicable fees^1,15.
6. For the contractor-licensure exemption, personally manage construction and solely occupy the property for at least 12 months after completion; required inspections generally require your presence unless a licensed architect drew and sealed the plans⁶.
7. Complete inspections in order and obtain the required certificate of occupancy before moving in^8,13.

Confirm jurisdiction and district standards before buying; county zoning applies to unincorporated parcels, while municipalities administer separate zoning^3,5. A private drinking-water well requires a local health-department construction permit; the county’s $400 well permit includes site evaluation and bacteriological water-sample analysis^21,26. Water or sewer connections may trigger Cape Fear Public Utility Authority fees, but we could not confirm a universal countywide connection mandate¹. Ask Current Planning & Zoning about floodplain and coastal approvals before relying on a building location^5,19,25. The effective property-tax rate is about 0.6% of assessed value, and the median annual bill is $2,075²³.