Accessory dwelling unit permit cost — Portsmouth, VA
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.
Frequently asked in Portsmouth
What are accessory dwelling units (ADUs) in Portsmouth?
Where can I find an accessory dwelling unit rental in Portsmouth?
Where can I find an accessory dwelling unit near me in Portsmouth?
What is the ADU cost in Portsmouth?
Do you offer 24-hour ADU services in Portsmouth?
What are some options for homes with in-law suites in Portsmouth?
What is involved in ADU building in Portsmouth?
Also serving nearby: Norfolk · Chesapeake · Hampton · Newport News · Virginia Beach
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Portsmouth — population 96,793; about 2,906 residents per square mile across 33.3 sq mi. ZIP codes covered include 23701, 23702, 23703, 23704, 23705, 23707, 23708, 23709.
Neighborhoods served in Portsmouth: Downtown Portsmouth, Cradock, Ghent (nearby), Churchland, Olde Towne — and every surrounding area.
Areas we serve
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