Attached ADU in Massachusetts
Aureli Construction
Eugene Road, Medford, MA 02155
An Accessory Dwelling Unit (ADU) is a self-contained living space on a residential property. Massachusetts law now makes ADU construction easier. Aureli Construction offers full-service ADU building, from zoning research to completed construction.
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Boston Building Concepts
275 Main Street, Watertown, MA 02472
ADUs are self-contained living spaces on existing properties. Legal in Massachusetts, local zoning rules apply. Boston Building Concepts is a Massachusetts ADU contractor offering full-service design, permitting, and construction of garage conversions, in-law suites, and detached ADUs.
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Bethoney Builders LLC
56 Depot Street, Duxbury, MA 02331
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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DCCS Construction
74 Howland Street, Boston, MA 02121
DCCS Construction helps Boston homeowners navigate the ADU program, converting basements, attics, and existing spaces into independent rental units. Serving 1-3 family homes, they handle both architectural design and construction for full ADU project management.
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Penfield & Sons Inc.
326 Chapman Street, Greenfield, MA 01301
Penfield & Sons, Inc. is a family-owned contractor in Greenfield, MA, serving Western Massachusetts since 1970. They offer roofing, insulated vinyl siding, and replacement windows, delivering quality residential renovation services.
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Keane Construction & Remodeling, LLC
167 Hixbridge Rd, Westport, MA 02790
Keane Construction & Remodeling, LLC offers expert ADU construction in Westport, MA, with 32 years of experience. Services include site evaluation, custom design, permitting, and full build of detached or attached accessory dwelling units across Bristol County.
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Core Remodeling Services
41 Boylston Street, Worcester, MA 01605
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.
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Beantown Builders, Inc.
181 North Montello Street, Brockton, MA 02302
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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JFC Pros Construction
292 Main Street, Northborough, MA 01532
JFC Pros Construction is a licensed general contractor in Massachusetts offering design, commercial, and new construction services. Their team includes architects, engineers, and tradespeople ensuring full code compliance with NFPA, ADA, IBC, IRC, and local building codes.
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Regulus Construction
36 West Street, Milford, MA 01757
Regulus Construction is a licensed ADU contractor serving MetroWest Massachusetts. They build detached backyard cottages, garage conversions, and in-law suites, managing design, permitting, and construction across 40+ towns.
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Boston Deck Builders
Natick, MA
Boston Deck Builders offers ADU construction in Greater Boston, including detached, attached, and interior units. Services cover planning, permitting, and build. Costs range from $150K–$400K+. Prefab options available. Compliant with Massachusetts ADU regulations.
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Horizon ADU
77 King Street, Boston, MA 02122
Trusted Boston ADU builders specializing in attached, detached, and two-story accessory dwelling units. Stick-built construction ensures code compliance and lasting value. Services include design, permitting, and full project management for multigenerational living or rental income.
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Salisbury Construction Worcester
453 Chandler Street, Worcester, MA 01602
Salisbury Construction Worcester builds ADUs across Worcester County, Central Mass & MetroWest. Services include detached units, garage conversions, basement conversions & home additions using a streamlined design-build process.
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CZ Construction Management LLC
181 Bowen Street, Boston, MA
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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Woodland Builders
195 Hanover Street, Hanover, MA 02339
Woodland Builders is a full-service ADU builder serving South Shore, MA, including Hingham, Plymouth & Scituate. They manage design through construction, ensuring quality, compliance, and streamlined project management for accessory dwelling units.
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Other cities in Massachusetts
What you need to know
Searching for top Attached ADU ADU Contractors in Massachusetts? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Attached ADU ADU Contractor in Massachusetts ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Attached ADU professionals can guide you through every step.
Massachusetts homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Attached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Attached ADU ADU Contractors in Massachusetts, and get started today.