Backyard ADUs is a full-service ADU builder serving New England, specializing in backyard cottages, granny flats, and in-law suites. They offer feasibility studies, design, permitting, and zoning research across Massachusetts, Maine, and New Hampshire.

Backyard ADUs, Brunswick, ME

About Backyard ADUs

Backyard ADU Builders Serving New England

Backyard ADUs is a full-service accessory dwelling unit builder operating across New England. They specialize in taking projects from initial design through permitting and all the way to move-in day. Whether a client is looking to build on raw land or add a backyard cottage to an existing property, this team positions itself as a small home expert with a comprehensive, guided process.

Their services cover the complete journey of building a compact home. A feasibility study is offered as a first step, helping prospective homeowners understand exactly what can be built on their property and what the associated costs will be. This upfront clarity is a hallmark of their approach as a trusted ADU contractor in the region.

Understanding Local ADU Rules Across New England

One of the most valuable resources this ADU builder provides is an extensive database of local zoning rules and regulations for accessory dwelling units across New England. Because rules vary significantly from town to town — covering everything from which zones allow ADUs, to maximum unit size, to rental restrictions — having this research readily available is a major advantage for anyone considering a granny flat or detached ADU.

Their research spans three primary states:

  1. Massachusetts — including Western Mass, Cape Cod, and Greater Boston areas. They also keep clients informed on legislative changes, such as the recently passed Affordable Home Act, which impacts ADU rules statewide.
  2. Maine — with evaluated cities and towns across Greater Portland, North of Portland, and Southern Maine, including communities such as Portland, Scarborough, South Portland, Falmouth, Yarmouth, Saco, Biddeford, Kennebunk, Kittery, Brunswick, and many more.
  3. New Hampshire — covering cities and towns including Portsmouth, Manchester, Rochester, Exeter, Londonderry, Bedford, Laconia, Gilford, and others throughout the state.

For anyone interested in building a Casita, in-law suite, or any form of accessory dwelling unit, knowing the local rules is the essential first step. This company makes that process significantly easier by maintaining up-to-date research across hundreds of municipalities.

A Practical Path to Compact Living

As a dedicated granny flat builder and backyard cottage builder, Backyard ADUs offers structured design paths that make the building process more predictable and efficient. Their builds have been completed across Massachusetts and Maine, with clients achieving meaningful outcomes such as dramatically reduced housing costs and energy-independent living through solar integration.

For those considering a detached ADU or any small home project, this team provides the local knowledge, design expertise, and regulatory guidance needed to move forward with confidence. Their combination of hands-on building services and deep regional research makes them a standout resource for New England homeowners exploring accessory dwelling unit options.

Services

Backyard ADUs performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Feasibility & Site Assessment

Backyard ADUs Reviews

Stuart Bicknell

2026-02-02
"After visiting a BYADU house in Florence, MA we contacted the office in Brunswick. We were in the process of moving from western MA to North Yarmouth, ME and were impressed with the concept, their models, and their openness to our ideas and variations. The whole building process - from design to site preparation to construction to change orders - was smooth and timely. Any time there was a wrinkle - and there were few - Jeff and James were quick to either respond themselves or send a staff member to attend to the details. Communication lines were always open and their responses to our questions and requests were clear and timely. They were sensitive to our journey - from our house in Massachusetts where we had lived for 46 years to this restart in Maine - and clearly understood the emotional and logistical challenges that came with this major life transition. As should be clear from the above, we recommend - without reservation - BYADU to anyone looking to purchase a small, well-built, energy-efficient, attractive home. The whole journey has been a pleasure! Without exception, every BYADU employee that weve had contact with has been friendly, highly skilled, and knowledgeable. Were settling in, loving the space, and very grateful to BYADU for all theyve done to make this transition smooth and positive. Stuart Bicknell and Nan Carey February 1, 2026"

Matthew Karukin

2026-01-15
"We are slightly biased because these guys and gals are our superheroes. After moving quickly through two absolutely awful contractors who were renovating our home, which essentially left us homeless in our backyard, Backyard ADU came in and quickly came up with the best and most affordable solution for us to move forward. Within less than a year, they had us back in a brand new, beautiful home. Our review wouldn't be different if we had started with them from the beginning. From the top of their company down, everyone on their crew had a great attitude, helpful and nice, with no drama. All the work was of great quality. Like any other builder in Maine, they are busy, but they always respond and show up when it matters."

Audrey Mason

2026-01-09
"Backyard ADUs helped us build a wonderful little ADU that fit our very limited space in Portland. We started with their L-Line model and tweaked it so it fit the location but still had all the amenities of home. One of the major pluses for me was the team managed city approval and utility installation. Small city lots can be a challenge and they made it happen. Special thanks to Jeff, James, Don, and the entire Maine-based crew."

Regina Momnie

2026-01-07
"Our experience with Backyard ADU was absolutely phenomenal! Throughout the entire process the team was amazing. The company took care of everything, from permitting to construction , they walked us through every detail. The information and support in terms of design options , costs and timeline were incredible . We knew exactly what was being done, when it was to be completed and everything was on time. We worked with some of the kindest most accommodating people throughout the process, they were all very accessible and followed through with any questions or concerns. They felt like family! We love our house, its exactly what we had envisioned and we would not change a thing. Big thank you to Jeff and his Backyard ADU team!"

Wendy Greebaum

2025-03-22
"So happy I went with Backyard ADU. It was a great experience. I had a fire while they were working on my house and they bumped me to the front of the line and got my home done two weeks early after moving up my date for completion 4 months. It was a pleasure to be in my new house this winter as it is solid and very Well insulated. When my neighbors saw how much insulation was going in my house, they said Id be able to heat it with a candle. They were just about right. I was able to modify the floor plan so that I could have additional space be creating an upstairs, which gives me room for guests."

Specifics

Eco-Friendly

Opening hours

Monday 8:00AM - 6:00PM
Tuesday 8:00AM - 6:00PM
Wednesday 8:00AM - 6:00PM
Thursday 8:00AM - 6:00PM
Friday 8:00AM - 5:00PM
Saturday -
Sunday -

Location

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