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.
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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.
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Spring Home Improvement offers expert ADU contractor services in Norfolk, MA. Family-owned since 2012, they handle design, permits, and construction with 10+ years of experience, transparent pricing, and a one-year labor warranty.
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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.
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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 zone... read more
Honorato Company offers a structured construction process in Boston, covering ADUs, garage conversions & renovations. From consultation to final walkthrough, they ensure transparency, permitting, design, and clear communication throughout.
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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.
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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
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.
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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+.
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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.
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Massachusetts' new ADU legislation allows homeowners to build detached or attached accessory dwelling units. CZ Construction Management LLC helps with planning, permits, and construction of ADUs across Massachusetts, including Greater Boston.
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Mass ADU is a Massachusetts-based ADU contractor offering full-service accessory dwelling unit construction. Services include free consultations, permitting, design, and build. They serve homeowners statewide with a clear 3-step process.
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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
Canton, Massachusetts, a charming town in Norfolk County with a rich industrial history tied to the Revere Copper Company and Paul Revere himself, is experiencing growing demand for Accessory Dwelling Units (ADUs). As housing costs in Greater Boston continue to rise, Canton homeowners are increasingly turning to qualified ADU contractors in Canton, MA to add value to their properties and create flexible living spaces. With its mix of historic homes, established neighborhoods, and proximity to Route 138 and I-93, Canton presents unique opportunities and challenges for ADU construction.
Before hiring an ADU contractor in Canton, homeowners must understand the local zoning bylaws. Canton's zoning regulations fall under the Town of Canton Zoning Bylaws, and ADUs — sometimes referred to as in-law apartments or accessory apartments — are subject to specific requirements. Massachusetts state law, particularly the 2021 Zoning Act (Chapter 40A reforms), has pushed municipalities to become more ADU-friendly. Key considerations for Canton ADU projects include:
Experienced ADU builders in Canton, MA work on a variety of project types tailored to the town's residential landscape. Given Canton's housing stock, which includes many colonial and cape-style homes, the most common ADU projects include:
Selecting a qualified licensed ADU contractor in Canton, Massachusetts is critical to a successful project. The right contractor will handle everything from permit applications with the Canton Building Department to final inspections. When evaluating contractors, homeowners should look for:
Investing in an ADU in Canton, MA is a smart long-term decision. Whether you're housing a family member, generating rental income, or increasing your property's resale value, working with a skilled Canton ADU contractor ensures your project is completed efficiently, legally, and to the highest standards.