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.
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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.
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BlackDog Builders offers full-service ADU design/build solutions, handling design, permitting, and construction under one roof. Specializing in detached ADUs, backyard cottages, in-law suites, and granny flats, they back projects with a 3-year war... read more
South Coast & Associates builds custom ADUs in Southeastern Massachusetts. From detached backyard cottages to garage conversions and in-law suites, they handle design, permitting, and construction for single-family homeowners.
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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.read more
MassDwell Solutions builds modular ADUs for homeowners, investors & developers. Models range from 470–892 sqft, starting at $164,500. Factory-built steel frame units include full warranties, energy-efficient features & 8–12 week instal... read more
ADU 4 You is a Boston-area ADU contractor offering full-service design, permitting, and construction of accessory dwelling units, including detached ADUs, in-law suites, and garage conversions, with fixed-price quotes and ROI estimates.
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New England Outdoor, a family-owned business in Methuen, MA, builds custom sheds, garages, pavilions, and ADUs across New England. Specializing in ADU construction, garage conversions, and in-law suites, they handle design, permits, and zoning gui... read more
Meetinghouse Builders offers custom ADU design & construction in Hollis, NH. Services include detached builds, garage conversions, basement ADUs & home additions. Features 3D renderings, style guides & full construction documents.
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New England Additions, backed by Sordan Construction, offers pre-designed ADU builds across 25+ Greater Boston communities. Specializing in in-law suites and detached ADUs, they streamline permitting, budgets, and timelines for Massachusetts homeo... read more
Core Remodeling Services has built ADUs and in-law suites across Central Massachusetts since 2012. They handle zoning, permits, design, and construction. Projects range from $150K–$400K+, take 6–8 months, and are backed by a 5-year warranty.read more
Salas Construction builds custom ADUs in Rhode Island, including attached, detached, and garage conversions. Projects range from $200K–$500K and take 6–12 months. Uses include rentals, guest suites, and multigenerational living.
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Boston Construct is a full-service ADU contractor in Boston, MA, building basement conversions, garage conversions, detached backyard cottages, and in-law suites. They handle design, permitting, and construction for 1-3 family homeowners across Gr... read more
Top Notch Contracting is a Massachusetts ADU builder specializing in detached backyard cottages, garage conversions, in-law suites, and multigenerational spaces. They manage permitting, construction, and completion across Boston and MA.
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Upgrading your home with professional renovations can dramatically enhance both its functionality and appeal, creating spaces tailored to meet your unique lifestyle. Whether you’re aiming to increase energy efficiency, improve layout flow, or re... read more
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.
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:
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:
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.
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.