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
An ADU unit is simply a secondary dwelling located on the same lot as a primary residence. You might look into an ADU if you need more space for a home office, a gym, or housing for extended family. Exact pricing confirmed free on the call.
Frequently asked in Quincy
What are the benefits of a prefab ADU in Quincy?
What does 'accessory dwelling unit' mean in Quincy?
In Quincy, an accessory dwelling unit (ADU) refers to a secondary, independent living unit on a single-family residential lot. This can be an attached or detached structure, providing complete living facilities. ADUs are intended to offer additional housing options within existing neighborhoods. They can serve as rental units, housing for family members, or a home office. Understanding Quincy's specific zoning for ADUs is key.
What are the advantages of a backyard accessory dwelling unit in Quincy?
What are the best accessory dwelling unit builders near me in Quincy?
What is the cost to build an accessory dwelling unit in Quincy?
Are there affordable accessory dwelling units available in Quincy?
What is the cost of an ADU in Quincy?
Also serving nearby: Boston · Cambridge · Newton · Brockton · Lynn
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Quincy — population 101,597; about 6,130 residents per square mile across 16.6 sq mi. ZIP codes covered include 02169, 02170, 02171, 02269.
Neighborhoods served in Quincy: Wollaston Hill, Germantown, Merrymount, North Quincy, South Quincy — and every surrounding area.
Areas we serve
Browse by state, then city.
California (3)
All of California · Costa Mesa · Jurupa Valley · Santa Maria
