Modular 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

A modular unit is built in a factory and then transported to your property to be finished on a foundation. You should consider this if you want a faster construction timeline with less disruption to your daily life. It is an efficient way to add high-quality space to your lot.

Frequently asked in Wilmington

Also serving nearby: Fayetteville · Greenville · Raleigh · Cary · Durham

All cities in North Carolina →

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: Downtown Wilmington, Carolina Beach Road, Ogden, Midtown, Leland (nearby) — and every surrounding area.