Detached ADU in New Hampshire
T&J Builders
919 U.S. 1 Bypass, Portsmouth, NH 03801
T&J Builders specializes in custom ADUs in Dover NH, Portsmouth NH, NH Seacoast, Lakes Region & Southern Maine. Services include garage conversions, in-law suites & detached cottages for rental income, multigenerational living & added property value.
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Réal Hazen Construction
633 Dartmouth College Highway, Orford, NH 03777
Réal Hazen Construction builds ADUs in Vermont and New Hampshire. Attached ADUs cost $100K–$250K; detached $200K–$350K+. Services include drafting, permitting, budgeting, and full construction, with builds completed in 2–4 months.
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BlackDog Builders
7 Red Roof Lane, Salem, NH 03079
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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Summit 48 Construction
95 Daniel Webster Highway, Meredith, NH 03253
Summit 48 Construction builds luxury ADUs in NH's Lakes Region, including guest houses, in-law suites & carriage homes. Custom finishes, zoning knowledge & full project management from design to completion.
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SRH Homes
99 South Road, North Hampton, NH 03862
SRH Homes builds custom ADUs, including 500 SF 1-bed and 800 SF 2-bed units. Options include high-end finishes and mini-split HVAC. Financing via HELOC or cash-out refinance. Ideal for rental units, granny flats, or in-law suites.
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Post Woodworking
163 Kingston Road, Danville, NH 03819
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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Allan Tran's Exterior Finish Work
20 Gravel Pit Road, Nottingham, NH 03290
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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Meetinghouse Builders
191 Depot Road, Hollis, NH 03049
Meetinghouse Builders offers custom ADU design & construction in Hollis, NH. Services include detached builds, garage conversions, basement ADUs & home additions. Features 3D renderings, style guides & full construction documents.
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Oxland Builders
240 Portsmouth Avenue, Stratham, NH 03885
Oxland Builders is a design/build remodeling company in Portsmouth, NH, serving the Seacoast region since 2003. Services include kitchen & bathroom remodeling, home additions, ADUs, in-law suites, and whole-home renovations across Rockingham County and Southern Maine.
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Foremost Builders
3 South Main Street, West Lebanon, NH 03784
Attached vs. detached ADUs in New England: Foremost Builders explains key differences. Attached ADUs cost less; detached offer more privacy and rental potential. Serving NH's Dartmouth-Lake Sunapee region since 1997.
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Other cities in New Hampshire
What you need to know
Searching for top Detached ADU ADU Contractors in New Hampshire? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Detached ADU ADU Contractor in New Hampshire 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 Detached ADU professionals can guide you through every step.
New Hampshire homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Detached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Detached ADU ADU Contractors in New Hampshire, and get started today.