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
Homes with in-law suites feature a dedicated area for aging parents or guests, usually with a bedroom and bathroom. You need this if you are managing multi-generational living and want to provide privacy for family members while staying close by. Exact pricing confirmed free on the call.
Frequently asked in Portsmouth
What are the benefits of an accessory dwelling unit in Portsmouth?
Where can I find accessory dwelling unit builders in Portsmouth?
What companies offer accessory dwelling unit services in Portsmouth?
What are homes with mother-in-law suites like in Portsmouth?
Are there affordable ADU options in Portsmouth?
What is involved in ADU building in Portsmouth?
Can I get an ADU quote 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: Olde Towne, Cradock, Waterview, Churchland, Greenbrier — and every surrounding area.
Areas we serve
Browse by state, then city.
