Cost to build accessory dwelling unit — Wilmington, NC
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
About this service
When estimating the cost to build, consider the difference between a prefab unit and custom construction, as well as site preparation requirements like clearing trees or grading land. Labor and material prices also play a significant role. We provide an exact pricing confirmed free on the call.
Frequently asked in Wilmington
How long can I expect an ADU to last in Wilmington, NC?
What's involved in accessory dwelling unit construction in Wilmington?
Where can I find the best ADU builder in Wilmington?
What are the permit requirements for an ADU in Wilmington?
How much does an accessory dwelling unit cost in Wilmington?
What kind of ADU services are available in Wilmington, NC?
Can you recommend an ADU estimate service in Wilmington?
Also serving nearby: Fayetteville · Greenville · Raleigh · Cary · Durham
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More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Wilmington — population 122,698; about 2,386 residents per square mile across 51.4 sq mi. ZIP codes covered include 28401, 28402, 28403, 28404, 28405, 28406, 28407, 28408.
Neighborhoods served in Wilmington: Carolina Place, Downtown Wilmington, Ogden, Monkey Junction — and every surrounding area.
Areas we serve
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