Adu building — 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.
About this service
Frequently asked in Portsmouth
What are the steps for accessory dwelling unit construction in Portsmouth?
What are accessory dwelling unit homes like in Portsmouth?
Can I build an accessory dwelling unit for rent in Portsmouth?
What are the permit requirements for an ADU in Portsmouth?
What does 'accessory dwelling unit' mean?
What is ADU construction in Portsmouth?
What ADU services are available 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, Cradock, Olde Towne, Waterview, Highland Park — and every surrounding area.
Areas we serve
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