Basement Conversion in Massachusetts
Atlantic Property Development
444 Broadway Unit B #1069, Saugus, MA 01906
ADUs are now legal statewide in Massachusetts. Atlantic Property Development builds custom Accessory Dwelling Units on the North Shore, offering design, permitting, and construction services for detached, attached, and garage conversion ADUs.
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Stella Home Services
25 Everett Street, Woburn, MA 01801
Stella 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 more
Republic Building Contractors
30 Log Bridge Road, Middleton, MA 01949
Republic Building Contractors is a full-service ADU contractor in Massachusetts handling design, permits, and construction under one roof. They build detached, attached, and garage conversion ADUs, with projects averaging 6–9 months.
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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.read more
River City Boston
9 Illinois Avenue, Somerville, MA 02145
River 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.
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Baystate Group Builders Inc
8 Bellingham Road, Blackstone, MA 01504
Baystate Group Builders Inc offers residential remodeling services including basement finishing, bathroom renovations, deck construction, carpentry, and painting. Led by Victor, the team is known for professionalism, clear communication, and quali... read more
Ron Morgan Construction
8 Harbor rd HB, Mattapoisett, MA 02739
Ron Morgan Construction is a Massachusetts ADU contractor offering full-service accessory dwelling units from 300–900 sq ft. Licensed under the 2024 Affordable Homes Act, they handle design, permits & construction. ADUs start at $90,000.
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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.... read more
ADU Of Massachusetts
56 Depot St, Duxbury, MA 02332
ADU Of Massachusetts is a full-service ADU builder specializing in design, permitting, and construction of accessory dwelling units. Serving homeowners statewide, they build attached, detached, garage conversions, in-law suites, and backyard cotta... read more
North Shore ADU Home Builders
Essex, MA 01929
North 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.
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Massachusetts Adu Plans
68 Harrison Avenue, Boston, MA 02111
Massachusetts homeowners can get permit-ready ADU plans starting at $800, delivered in days. Three tiers cover plans, cost estimates, and full custom design up to $3,100. Free ADU Starter Guide available.
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Top Pro Inc.
35 Bradshaw Street, Medford, MA 02155
Top-Pro Construction, Inc. is Greater Boston's trusted ADU builder with 25 years of experience. Specializing in detached ADUs, attached units, garage conversions & basement ADUs to boost property value and rental income.
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13 Gables Inc
64 Millbury Road, Worcester, MA 01540
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
Priced Early LLC
20 Hampden Drive, South Easton, MA 02375
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
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 proj... read more
Other cities in Massachusetts
What you need to know
Searching for top Basement Conversion ADU Contractors in Massachusetts? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Basement Conversion 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 Basement Conversion 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 Basement Conversion experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Basement Conversion ADU Contractors in Massachusetts, and get started today.