Trust Contractors

65 Hancock Street, Bedford, MA 01730 15.8 miles

Trust Contractors designs and builds ADUs, including detached units, garage conversions, basement ADUs, and in-law suites. Services cover zoning, permits, and construction, helping homeowners add rental income, family housing, or flexible living space.

Pro's Edge Small Homes

27 Pillsbury Street, Georgetown, MA 01833 29.5 miles

Licensed 30 years in business Prefab Specialist

Pro's Edge Small Homes is a licensed ADU contractor in MA & NH with 20+ years experience. They offer turnkey design, permitting & modular construction of granny flats, in-law suites & backyard cottages, including a free property evaluation.

Mass Tiny Homes

800 Lexington Waltham Plaza #1012, Waltham, MA 02451 8.8 miles

Mass Tiny Homes helps you build the perfect ADU for your needs, whether it be for aging parents or rental income, with an easy, streamlined process from start to finish.

WR Builders Inc

397 Elliot Street, Newton, MA 02464 7.3 miles

BuildX- Your Building & ADU Experts

1 Marion Drive, Carver, MA 02330 31.4 miles

Licensed 40 years in business Free Consultation

BuildX is a trusted ADU contractor in Southeastern Massachusetts with 40+ years of experience. They offer custom stick-built accessory dwelling units, granny flats, and in-law suites with a 100-day build guarantee and transparent pricing.read more

True Measure Construction

293 Turnpike Road, Westborough, MA 01581 29 miles

Eco-Friendly Turnkey Solutions

True Measure Construction, a Westborough, MA general contractor, specializes in full-service ADU construction—covering permits, site prep, and finishing—plus kitchen and bathroom remodeling for a complete home improvement solution.

Sordan Construction

809 Turnpike Street, North Andover, MA 01845 24.8 miles

Eco-Friendly

Planning an ADU in Massachusetts? Costs range from $250–$500+ per sq ft. State law now allows ADUs by right on single-family lots. Learn about permits, the Stretch Energy Code, and working with a qualified ADU contractor in Greater Boston.

Bethoney Builders LLC

56 Depot Street, Duxbury, MA 02331 28.8 miles

Bethoney Builders LLC is a South Shore residential contractor specializing in ADU construction, home additions, custom builds, and renovations. Services include in-law suites, garage conversions, finished basements, and structural repairs.

All City Remodeling

3 Sophie Rd, Peabody, MA 01960 15.4 miles

All City Remodeling Co. offers ADU construction, period molding installation, and beam ceiling paneling in Boston, MA, and North Shore communities including Hamilton, Salem, and Manchester-by-the-Sea.

MBA Builders

500 Edgewater Drive, Wakefield, MA 01880 14.2 miles

Licensed

Massachusetts ADUs are now legal by right statewide after 2024 legislation. MBA Builders offers full-service ADU construction across Greater Boston, with structured preconstruction planning and builds starting around $450/sq ft.

Platt Builders

109 Central Avenue, Ayer, MA 01432 29.9 miles

In-House Architect Turnkey Solutions

Platt Builders is a home remodeling company offering kitchen, bathroom, and whole-home renovations. They focus on custom design, quality craftsmanship, and clear communication, managing every project from planning to completion.

Steveworks LLC

108 Cabot Street, Newton, MA 02458 5.9 miles

Eco-Friendly

Steveworks LLC completed a whole house remodel in Newton, redesigning the floor plan, replacing windows, siding, and roofing, and upgrading insulation. They also built an accessible ADU above a garage, featuring a full kitchen, curbless shower, and chair lift for aging-in-place living.

13 Gables Inc

64 Millbury Road, Worcester, MA 01540 41.3 miles

Licensed 38 years in business

13 Gables Inc, a licensed MA general contractor with 38+ years experience, builds custom ADUs including detached units, garage conversions & in-law suites. Massachusetts' 2025 Affordable Homes Act now allows ADUs by right in single-family zones.

Turkel Design

1060 Broadway, Somerville, MA 02144 6.1 miles

Prefab Specialist Luxury Builds

Turkel Design offers custom-designed accessory dwelling units (ADUs) using a prefab process. Highlights include expert cabinetry, smart storage, and high-quality finishes, ensuring ADUs feel purposeful and cohesive with the main residence.

Design 1 Kitchen & Bath

363 Great Road, Bedford, MA 01730 14.5 miles

Design 1 Kitchen & Bath designs and builds ADUs in Massachusetts, handling consultation, design, permitting, and construction. ADUs add rental income, multigenerational living space, and property value for Greater Boston homeowners.

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