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Attached ADU in Massachusetts
True Measure Construction
293 Turnpike Road, Westborough, MA 01581True 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.
read moreNew England Outdoor
37 Oakland Avenue, Methuen, MA 01844New 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 guidance.
read moreWR Builders Inc
397 Elliot Street, Newton, MA 02464North Shore ADU Home Builders
Essex, MA 01929North Shore ADU Home Builders LLC builds custom ADUs up to 900 sq ft across Massachusetts. Services cover design, permits & construction. Rental income ranges $1,800–$3,500/month. Property values may rise $100K–$250K.
read moreADU Building Systems, LLC
Norwell, MA 02061ADU 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 moreTurnkey ADUs
435 Lancaster ST, Leominster, MA 01453Turnkey ADUs is a Leominster, MA ADU contractor offering modular, prefabricated accessory dwelling units across New England. Models range from $119K–$249,900. Massachusetts' 2024 Affordable Homes Act now allows ADUs up to 900 sq. ft. by right.
read moreFiveTen Construction & Design
462 Washington Street, Woburn, MA 01801FiveTen Construction & Design is a Massachusetts ADU contractor offering design, permitting, and construction services. They build detached, attached, basement, and garage ADUs, ensuring full compliance with MA building codes and zoning regulations.
read moreRiver City Boston
9 Illinois Avenue, Somerville, MA 02145River City Construction is a Boston-based ADU contractor specializing in home additions, garage conversions, in-law suites & detached backyard cottages. They manage design, permitting & full construction under one roof.
read moreStella Home Services
25 Everett Street, Woburn, MA 01801Stella Home Services is a Greater Boston ADU contractor specializing in basement apartments, garage conversions, in-law suites & home additions. They manage design, permitting & construction for fully functional accessory dwelling units.
read moreHonorato Company
34 Commerce Way, Woburn, MA 01801Honorato 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.
read moreThink ADU
123 Main Street, Worcester, MA 01608Think ADU is a California ADU contractor specializing in design, permitting, and construction of accessory dwelling units. Services include detached ADUs, garage conversions, JADUs, granny flats, and in-law suites for rental, family, or property value goals.
read moreADU-PRO Corp.
121 Orchard Street, Millis, MA 02054Studio Luz Architects
4238 Washington Street, Boston, MA 02131Studio Luz Architects designed a 1,180 sq ft attached ADU featuring solar power, wind energy, energy recovery systems, and water collection. The sustainable addition boosted property value while serving as a functional secondary living space.
read moreBradford Construction Management
145 South Main Street, Haverhill, MA 01835Bradford Construction Management brings commercial-grade project management to every ADU we build across the North Shore. That means daily photo documentation so you always know what's happening on site, transparent pricing so there are no budget surprises, and a clear schedule with real milestones.
read moreOther cities in Massachusetts
- Acton
- Adams
- Attleboro
- Blackstone
- Boston
- Brockton
- Carver
- Duxbury
- Easthampton
- Essex
- Georgetown
- Greenfield
- Hanover
- Haverhill
- Ipswich
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.