River City Boston

9 Illinois Avenue, Somerville, MA 02145 32.5 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.

13 Gables Inc

64 Millbury Road, Worcester, MA 01540 45.8 miles

Licensed 38 years in business

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 zones.

Provost Companies

20 Maple Street, Stoughton, MA 02072 47.5 miles

Allan Tran's Exterior Finish Work

20 Gravel Pit Road, Nottingham, NH 03290 28.3 miles

Licensed

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.

Mass ADU

144 Arlington Road, Woburn, MA 01801 25.7 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.

G.M. Roth Design Remodeling

12 Murphy Drive, Nashua, NH 03062 0.7 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.

JFC Pros Construction

292 Main Street, Northborough, MA 01532 29.9 miles

Licensed In-House Architect In-House Engineer

JFC Pros Construction is a licensed general contractor in Massachusetts offering design, commercial, and new construction services. Their team includes architects, engineers, and tradespeople ensuring full code compliance with NFPA, ADA, IBC, IRC, and local building codes.

Kinstruct Tiny Homes

3 Glass St, Pembroke, NH 03275 26.4 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.

Turnkey ADUs

435 Lancaster ST, Leominster, MA 01453 20.8 miles

Prefab Specialist Eco-Friendly Luxury Builds

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.

Steveworks LLC

108 Cabot Street, Newton, MA 02458 31.6 miles

Eco-Friendly

Steveworks LLC completed a whole house remodel in Newton, redesigning the floor plan, replacing windows, siding, and roofing, and upgrading insulation. They also built an accessible ADU above a garage, featuring a full kitchen, curbless shower, and chair lift for aging-in-place living.

Horizon ADU

77 King Street, Boston, MA 02122 38.5 miles

Trusted Boston ADU builders specializing in attached, detached, and two-story accessory dwelling units. Stick-built construction ensures code compliance and lasting value. Services include design, permitting, and full project management for multigenerational living or rental income.

Trust Contractors

65 Hancock Street, Bedford, MA 01730 20.5 miles

Trust Contractors designs and builds ADUs, including detached units, garage conversions, basement ADUs, and in-law suites. Services cover zoning, permits, and construction, helping homeowners add rental income, family housing, or flexible living space.

North Shore ADU Home Builders

Essex, MA 01929 37 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.

Bradford Construction Management

145 South Main Street, Haverhill, MA 01835 20.6 miles

Bradford Construction Management brings commercial-grade project management to every ADU we build across the North Shore. That means daily photo documentation so you always know what's happening on site, transparent pricing so there are no budget surprises, and a clear schedule with real milestones.

Atlantic Property Development

444 Broadway Unit B #1069, Saugus, MA 01906 30.5 miles

40 years in business Eco-Friendly Free Consultation

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.

Other cities in New Hampshire

What you need to know

ADU Contractors in Nashua, NH: Building in New Hampshire's Second-Largest City

Nashua, New Hampshire, is a thriving city known for its strong economy, proximity to the Massachusetts border, and consistently high rankings as one of the best places to live in the United States. As housing demand continues to grow in this bustling southern New Hampshire hub, Accessory Dwelling Units (ADUs) have become an increasingly popular solution for homeowners looking to add rental income, house family members, or increase property value. Finding experienced ADU contractors in Nashua, NH is the first critical step toward making your ADU project a success.

Understanding Nashua's Zoning and ADU Regulations

Before breaking ground, it's essential to understand the local rules governing ADU construction in Nashua. The city follows specific zoning ordinances that ADU contractors must navigate carefully. Key regulatory considerations include:

Types of ADUs Built by Nashua Contractors

Skilled ADU contractors in Nashua are experienced in building several types of accessory dwelling units to suit different property layouts and homeowner needs:

Why Hire a Local Nashua ADU Contractor?

Hiring a local ADU contractor in Nashua, NH offers significant advantages. Local professionals are familiar with New Hampshire's building codes, Nashua's specific zoning bylaws, and the regional climate considerations that affect construction — including the need for proper insulation and heating systems to handle harsh New England winters. A knowledgeable local contractor will also have established relationships with Nashua's permitting offices, helping to streamline approvals and avoid costly delays.

Whether you're looking to create a rental unit, accommodate aging parents, or simply maximize your property's potential, partnering with a qualified ADU contractor in Nashua, New Hampshire ensures your project is completed safely, legally, and to the highest standard.

ADU Contractors near Nashua, NH