G.M. Roth Design Remodeling offers full-service ADU construction in southern NH and northeastern MA. With 40+ years of experience, they handle zoning, design, permitting, and build. CAPS-certified, serving Nashua, Manchester, Chelmsford & more.
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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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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 & statewide.
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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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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 warranty.
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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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Heritage Modular Homes builds ADUs across MA, RI, CT & NH. With 40+ years experience, they offer custom ADU design, modular installation & in-law suites, backed by a 10-year warranty & free consultations.
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Post Woodworking builds custom Accessory Dwelling Units (ADUs), including detached ADUs and in-law suites. They offer flexible involvement, from full construction management to building only, ensuring seamless integration with your existing home.
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Boston ADUs add rental income ($1,500–$3,000/month), boost property value, and support multi-generational living. Boston ADU Builder offers detached, attached, garage, and basement conversions, handling design, permits, and construction in 8–12 months.
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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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Allan Tran's Exterior Finish Work (AJT Properties) specializes in residential exterior services including deck construction, porch railing installation, storage structures, and CertainTeed siding. Known for reliable communication, on-budget delivery, and durable craftsmanship.
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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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ADU 4 You is a Boston-area ADU contractor offering full-service design, permitting, and construction of accessory dwelling units, including detached ADUs, in-law suites, and garage conversions, with fixed-price quotes and ROI estimates.
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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.
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Acorn Deck House builds luxury prefab ADUs in MA, featuring exposed beams & large windows. Options include 900 sq ft & 730 sq ft models. ADUs boost property value by 25–34% & generate rental income.
read moreSalem, New Hampshire is one of the state's most dynamic communities, situated directly on the Massachusetts border along Route 28 and Interstate 93. Known for its strong retail economy anchored by the Rockingham Park area and a rapidly growing residential population, Salem has seen increasing demand for Accessory Dwelling Units (ADUs). Homeowners in Salem are turning to experienced ADU contractors to maximize their property value and address the region's tight housing market, particularly given the town's appeal to commuters heading into the Greater Boston area.
Before breaking ground, it's essential to understand Salem's local zoning ordinances. Salem operates under its own Zoning Ordinance, and ADUs are generally permitted as accessory uses in residential zones, but subject to specific conditions. Key regulatory points that qualified ADU contractors must navigate include:
New Hampshire state law, particularly RSA 674:71-73, provides a framework encouraging municipalities to allow ADUs, and Salem has aligned its local ordinances accordingly. However, working with a knowledgeable local ADU contractor ensures full compliance with both state and town-specific requirements.
Experienced ADU contractors in Salem, NH offer a variety of construction options tailored to the town's mix of colonial-style homes, ranch properties, and newer developments. Common ADU types include:
Hiring a local ADU contractor in Salem, New Hampshire offers significant advantages. Local professionals are familiar with the town's permitting timelines, building inspectors, and specific soil and frost-depth considerations common to Southern New Hampshire's climate. They also understand the architectural character of Salem neighborhoods, ensuring your ADU blends seamlessly with the existing structure.
With Salem's proximity to Massachusetts and its strong rental demand, a well-built ADU can generate substantial rental income or provide flexible multigenerational living space. ADU contractors in Salem, NH can help homeowners assess feasibility, manage permitting, and deliver high-quality construction that meets all local codes — making your ADU project a smart, long-term investment in one of New Hampshire's most sought-after communities.