Walsh Builders offers custom ADU construction in Blackstone, Milford, Wellesley, and nearby Massachusetts areas. Services include design, permitting, construction, and finishing for in-law suites, backyard cottages, and detached accessory dwelling units.

Walsh Builders – ADU Contractor in Blackstone, MA

About Walsh Builders

Custom ADU Construction in Blackstone, MA

Walsh Builders works as an ADU contractor serving Blackstone, Milford, Wellesley, and surrounding Massachusetts communities. Homeowners looking to add space for guests, aging family members, or rental income can turn to Walsh Builders for accessory dwelling unit construction that fits within existing property lines and local zoning rules.

As an accessory dwelling unit builder, Walsh Builders approaches each project with attention to how the new structure will complement the existing home. The team manages the process from initial design through final construction, aiming to reduce the stress that often comes with adding a new living space to a property.

Services Offered by Walsh Builders

Walsh Builders provides a range of services connected to ADU construction, including:

  1. Design & Planning – Layouts developed to match the homeowner's needs while complying with local building codes.
  2. Permitting Assistance – Guidance through the approval process required before construction can begin.
  3. Construction & Installation – Building the structure with attention to structural and finishing details.
  4. Finishing Touches – Flooring, lighting, cabinetry, and fixtures installed to bring the unit to a move-in ready condition.

This full-service approach means Walsh Builders can serve as both ADU builder and in-law suite builder, depending on the intended use of the space. Some homeowners request a private suite for a family member, while others are focused on a backyard cottage builder project meant to generate rental income.

Flexible ADU Options

Walsh Builders designs units intended for a variety of purposes, such as home offices, guest suites, or detached living spaces for aging parents. Projects can range from modern studios to one- or two-bedroom units, depending on the available lot and the homeowner's goals. As a detached ADU builder, Walsh Builders takes into account how the new unit will sit on the property and how it will connect to utilities and access points.

Material selection and construction methods are chosen with an eye toward long-term durability and reasonable energy use. Each ADU is designed to work with the existing home's exterior style rather than standing out as a mismatched addition.

Homeowners in Blackstone, Milford, Wellesley, and nearby areas of Massachusetts considering an ADU project can contact Walsh Builders to discuss design options, permitting requirements, and construction timelines for their property.

Services

Walsh Builders performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Finishing & Fit-out

Walsh Builders Reviews

Kristine Daley

2026-08-04
"John and his team built a beautiful new home for our family after we lost our previous home in a fire. The craftsmanship and finishes are of excellent quality, and the project was completed on schedule. John also went above and beyond by working with our insurance company during the settlement process, which was very helpful."

bgholland1

2025-07-11
"We recently moved into our new home and our experience with Walsh Brothers Builders exceeded all expectations. John is a pleasure to work with. His honesty, integrity and quality of workmanship made the project a great experience. Every step of the way, we felt that John was our partner. His philosophy was I want you to love your home. He guided us through the many selections required in a custom home and whatever we requested, he made it happen. He clearly loves what he does and it showed in the finished product. I highly recommend Walsh Brothers."

Stacey Jones

2025-02-24
"Top-notch, professional, and efficient! My family and I have had the pleasure of working with Walsh Brothers Builders on multiple projects, over the past 20 years. From building our home from the ground up, refreshing our barn, to finishing our basement, and I cant recommend them highly enough. Their workmanship has been impeccable and their attention to detail, quality of materials, and precision in every task has made each project a success. The Walshs are honest, transparent and provide great advice on where it makes sense to invest a little more and where you can save, ensuring the project stays within budget while not sacrificing quality. It's rare to find contractors that offer such thoughtful guidance! Their collaborative and clear communication ensures everything runs smoothly and projects remain on schedule. Next steps and expectations were always defined, we always knew where we stood and when to expect the next phase to be completed etc. Overall, working with Walshs has been a fantastic experience, and I would not hesitate to hire them again for any future projects. Theyve earned our full trust, and we truly believe they deliver top-quality work at a fair price."

Anthony Karamas

2025-02-15
"We cannot speak more highly about how good of an experience we had with John Walsh and his team. He was great to work with throughout the process and the craftsmanship was outstanding. We are incredibly happy with our new home!"

Todd Sharpe

2024-08-22
"We found John just using Google to look for builders local to the area. He walked us through a house that was being built and after talking in depth about his plans for it we committed. From those early discussions it was clear to me John cared about making sure the house was high quality and doing the right thing for the customer. Since we signed on during an early building phase, we were able to customize almost anything: tiles, flooring, cabinets, countertopbacksplash, plumbinglight fixtures, utility locations, trimwall paint, garage doors, landscaping John could tell we wanted to be hands on and actively brought things to our attention that he thought we might have an opinion on. He was very patient and helped us through these decisions, giving us advice and trying to identify things we would like. Throughout the building process John was very attentive, easily reachable, detail-oriented and always available to answer any questions. He followed up when he said he would, kept track of any changes we discussed, always took the time to explain what was going on or how things worked. This reassured us we were in good hands. John kept us updated on the status of the build, allowing us to drop by anytime to see progress as well as ask any questions of him or his team. All his sub-contractors were as friendly and easy to work with as he was. The house was delivered on time and weve had no issues with the house since moving in a month ago. Any questions weve had about how things worked John has answered. Buying a house can be a stressful and difficult time and we are really grateful we chose to work with John. We highly recommend him."

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Eco-Friendly

Opening hours

Monday open 24h
Tuesday open 24h
Wednesday open 24h
Thursday open 24h
Friday open 24h
Saturday open 24h
Sunday open 24h

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