ADU Contractors near Concord, MA
Bethoney Builders LLC
56 Depot Street, Duxbury, MA 02331
46.9 miles
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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ADU Builders of MA
807 Massachusetts Avenue, Boston, MA 02118
17.7 miles
Expert ADU builders serving Massachusetts homeowners. Services include detached ADUs, garage conversions, basement units & in-law suites. Fully permitted, code-compliant builds. Costs from $80K. Serving Boston, Cambridge, Worcester & state... read more
13 Gables Inc
64 Millbury Road, Worcester, MA 01540
32.4 miles
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
BlackDog Builders
7 Red Roof Lane, Salem, NH 03079
26.1 miles
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
Kinstruct Tiny Homes
3 Glass St, Pembroke, NH 03275
46.4 miles
Kinstruct Tiny Homes is a Pacific Northwest contractor specializing in tiny homes and ADUs, including detached ADUs, backyard cottages, granny flats, and in-law suites built to maximize space and meet local codes.
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Massachusetts Adu Plans
68 Harrison Avenue, Boston, MA 02111
18.4 miles
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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Republic Building Contractors
30 Log Bridge Road, Middleton, MA 01949
21.7 miles
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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Turnkey ADUs
435 Lancaster ST, Leominster, MA 01453
18.4 miles
Turnkey 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 more
Woodland Builders
195 Hanover Street, Hanover, MA 02339
37.2 miles
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 u... read more
Boston Building Concepts
275 Main Street, Watertown, MA 02472
13.1 miles
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 convers... read more
Design 1 Kitchen & Bath
363 Great Road, Bedford, MA 01730
6.8 miles
Design 1 Kitchen & Bath designs and builds ADUs in Massachusetts, handling consultation, design, permitting, and construction. ADUs add rental income, multigenerational living space, and property value for Greater Boston homeowners.
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All City Remodeling
3 Sophie Rd, Peabody, MA 01960
20.4 miles
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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Avalon Building Systems
560 Turnpike Street, Canton, MA 02021
25 miles
Avalon Building Systems builds custom modular homes and ADUs across the northeastern US. A VA Certified Builder, they offer turnkey services, Energy Star-compliant construction, and compact floor plans like in-law suites and backyard cottages.
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Beantown Builders, Inc.
181 North Montello Street, Brockton, MA 02302
32 miles
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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Mass ADU
144 Arlington Road, Woburn, MA 01801
12.9 miles
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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Other cities in Massachusetts
What you need to know
ADU Contractors in Concord, MA: Building in a Historic New England Town
Concord, Massachusetts is one of the most historically significant towns in the United States, home to the site of the first battle of the American Revolution and the birthplace of the Transcendentalist movement. This rich heritage means that ADU contractors in Concord, MA must navigate a unique set of considerations, including strict historic preservation guidelines and design standards that protect the town's iconic character. Working with an experienced accessory dwelling unit contractor in Concord is essential to ensure your project respects both local aesthetics and regulatory requirements.
Concord Zoning Bylaws and ADU Regulations
Massachusetts passed Chapter 40A Section 3, which requires all municipalities to allow ADUs by right on single-family lots. Concord has aligned its local bylaws accordingly, but homeowners must still comply with specific local requirements. Key regulations that ADU builders in Concord, MA must follow include:
- Size limitations: ADUs are generally limited to no more than 900 square feet or a percentage of the primary dwelling's floor area.
- Owner-occupancy: Concord may require that the property owner occupy either the primary residence or the ADU.
- Setback requirements: Detached ADUs must comply with Concord's existing setback rules for accessory structures.
- Historic District compliance: Properties within Concord's Historic Districts require approval from the Concord Historic Districts Commission before construction begins.
- Design standards: Exterior materials, rooflines, and architectural details must be compatible with the existing structure and neighborhood character.
Types of ADUs Built by Concord Contractors
Skilled ADU contractors serving Concord, Massachusetts are experienced in building a variety of accessory dwelling unit types to suit different property layouts and homeowner needs. Common ADU types include:
- Attached ADUs – additions connected to the main home, ideal for expanding living space
- Detached ADUs – standalone backyard cottages or carriage house conversions
- Basement ADUs – conversions of existing basement space into a fully functional unit
- Garage conversions – transforming an existing detached garage into a livable space
Why Hire a Local ADU Contractor in Concord, MA?
Hiring a local ADU contractor in Concord offers significant advantages. Local professionals understand the town's permitting process through the Concord Building Department, are familiar with the Historic Districts Commission review process, and have established relationships with local inspectors. This local expertise can save homeowners considerable time and money throughout the project.
Whether you're looking to create rental income, house a family member, or increase your property value, a qualified ADU contractor in Concord, MA can guide you through every step — from initial design and permitting to final construction. Given Concord's unique regulatory landscape, working with an experienced professional is not just helpful — it's essential.