4 Best ADU Builders in Boston, Massachusetts
Verified ADU contractors and builders in Boston, MA
Showing 1–4 of 4 listings
A D Construction LLC
Transform your underutilized garage into a functional living space with expert garage-to-living-space conversions throughout the Boston area. Our specialized team handles every aspect of your conversion project, from structural modifications and insulation to permits and finishing touches, ensuring a seamless addition to your home.
ADU Builders of MA
Specializing in accessory dwelling unit construction throughout the Boston area, this contractor helps homeowners maximize their property value by building secondary living spaces that meet local codes and regulations. From design consultation to final build-out, they provide comprehensive ADU services for single-family properties in Massachusetts.
Horizon ADU
Specializing in accessory dwelling unit construction throughout the Boston area, we help homeowners maximize their property potential with custom-designed ADUs that add rental income or multi-generational living space. Our expert team handles every phase from permitting to completion, ensuring your ADU project meets local codes and exceeds your expectations.
HORIZON ADU CONSTRUCTION CONTRACTOR
We specialize in designing and constructing high-quality detached accessory dwelling units (ADUs) that enhance your property’s value, increase your income potential, and meet your family’s evolving needs.
Frequently Asked Questions — ADU Builders in Boston
How much does it cost to hire an ADU builder in Boston?
ADU construction costs in Boston, Massachusetts vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Boston to get accurate quotes for your specific project.
How long does it take to build an ADU in Boston?
In Boston, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Massachusetts local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Boston?
Yes, a building permit is required for ADU construction in Boston, Massachusetts. Your ADU builder will typically handle the permit application as part of their service. Massachusetts has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Boston?
Common ADU types in Boston include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Boston ADU builder can advise on what's allowed on your specific parcel.