Luxe & Co Accessory Dwellings

60 Thoreau Street, Concord, MA 01742 16.7 miles

Luxe & Co. Accessory Dwellings is a Massachusetts ADU builder offering full-service design, construction, and permitting. Founded by Hope Beckman and Sage Conti, they specialize in high-end ADUs including in-law suites, carriage houses, and home offices.

Auburndale Builders

151R Adams Street, Newton, MA 02458 6.2 miles

Auburndale Builders completed an 800 sq ft ADU in Newton, MA—a single-level, universally accessible in-law suite with full kitchen, bathroom, bedroom & living area, built in compliance with local zoning regulations.

Beantown Builders, Inc.

181 North Montello Street, Brockton, MA 02302 16.3 miles

Licensed 10 years in business

Beantown Builders, Inc. is a Greater Boston ADU contractor offering full-service design, permitting, and construction. Projects include detached ADUs, garage conversions, and in-law suites, with budgets from $15,000 to $1M+.

Provost Companies

20 Maple Street, Stoughton, MA 02072 13.4 miles

Priced Early Companies

20 Hampden Drive, South Easton, MA 02375 18.7 miles

ADU Building Systems, LLC

Norwell, MA 02061 17.9 miles

Prefab Specialist Eco-Friendly Luxury Builds

ADU Building Systems LLC builds factory & site-built ADUs in Massachusetts, including detached, attached & converted units. Offering 10-year structural warranties, cost savings up to 50%, and full-service design to turnkey construction.

NE Tiny Homes

969 Waterman Avenue, East Providence, RI 02914 37.3 miles

Luxury Builds

NE Tiny Homes is a full-service ADU builder across the US, offering custom tiny homes, garage conversions, and ADUs from 352 sq ft. Transparent pricing, permit handling, and move-in-ready builds for rental income or in-law suites.

Brittivia Homes & Construction

913 Northfield Road, Lunenburg, MA 01462 39.4 miles

20 years in business

Brittivia Homes & Construction offers expert ADU construction in Middlesex, Worcester & Essex counties, MA. With 20+ years experience, they handle permits, garage conversions & in-law suites. Costs range $150–$300/sq ft.

JB Cote Construction

25 Grand Avenue, Cumberland, RI 02864 30.7 miles

Eco-Friendly

J. B. Cote Construction is an ADU contractor in Rhode Island & Massachusetts, specializing in detached ADUs, garage conversions, in-law suites & more. They manage design, permitting, zoning & energy-efficient construction from start to finish.

Acorn Deck House Company

852 Main Street, Acton, MA 01720 21.3 miles

77 years in business Prefab Specialist Eco-Friendly

Acorn Deck House builds luxury prefab ADUs in MA, featuring exposed beams & large windows. Options include 900 sq ft & 730 sq ft models. ADUs boost property value by 25–34% & generate rental income.

Hawthorn Builders

97 Chapel Street, Needham, MA 02492 8.2 miles

Luxury Builds

Hawthorn Builders offers end-to-end ADU construction, managing consultation, design, permitting, and building. As a detached ADU and garage conversion contractor, they complete accessory dwelling units in ~90 days with minimal disruption.

Other cities in Massachusetts

What you need to know

Building ADUs in Boston's Historic Urban Landscape

Boston, Massachusetts is one of America's oldest cities, featuring a dense urban fabric of historic brownstones, triple-deckers, and century-old neighborhoods. This unique character makes working with experienced ADU contractors in Boston absolutely essential. The city's aging housing stock, narrow lot lines, and strict historic preservation requirements create a complex environment that demands specialized knowledge from any contractor tackling an Accessory Dwelling Unit (ADU) project.

Boston's ADU Regulations and Zoning Requirements

In 2021, Boston significantly expanded its ADU program through the Additional Dwelling Unit Program, allowing owner-occupants in all Boston neighborhoods to add one ADU to their property. This was a major policy shift that opened up new opportunities for homeowners. Key regulatory points that qualified ADU contractors in Boston, MA must navigate include:

Types of ADUs Boston Contractors Commonly Build

Given Boston's dense residential neighborhoods, the most common ADU types differ from those seen in suburban or western U.S. cities. Skilled Boston ADU contractors frequently work on:

Why Hiring a Local Boston ADU Contractor Matters

Hiring a contractor with deep local expertise is critical in Boston. Local ADU contractors understand the nuances of working with Boston's aging infrastructure, including outdated electrical panels, cast-iron plumbing, and older foundation systems common in neighborhoods like Jamaica Plain, South Boston, Dorchester, and Roxbury. They also maintain established relationships with the city's permitting offices, helping to streamline approvals and avoid costly delays.

Cost of Building an ADU in Boston

Due to high labor costs and the complexity of urban construction, ADU construction costs in Boston typically range from $150,000 to $350,000 or more, depending on the scope and type of project. Basement conversions tend to be more affordable, while detached units or projects in historic districts can cost significantly more. Working with a reputable Boston ADU contractor ensures your investment is protected and your project meets all local code requirements.

ADU Contractors near Boston, MA