Honorato Company

34 Commerce Way, Woburn, MA 01801 41.9 miles

Honorato 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.

Kinstruct Tiny Homes

3 Glass St, Pembroke, NH 03275 34.2 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.

FiveTen Construction & Design

462 Washington Street, Woburn, MA 01801 41.9 miles

10 years in business Eco-Friendly

FiveTen 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.

North Shore ADU Home Builders

Essex, MA 01929 29.4 miles

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.

G.M. Roth Design Remodeling

12 Murphy Drive, Nashua, NH 03062 41.9 miles

Licensed 39 years in business

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.

Aureli Construction

Eugene Road, Medford, MA 02155 46.9 miles

Eco-Friendly

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.

River City Boston

9 Illinois Avenue, Somerville, MA 02145 48.7 miles

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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What you need to know

Searching for top Attached ADU ADU Contractors in Portsmouth, New Hampshire? 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 Portsmouth 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.

Portsmouth 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 Portsmouth, New Hampshire, and get started today.

Attached ADU near Portsmouth, NH