At Gilmore Building Company, we don’t just build houses—we create homes that honor New England’s architectural traditions while incorporating the latest innovations in homebuilding and energy efficiency. If you're searching for a New England-style home builder, contact us today to start planning your dream home.

Custom New Home Design & Build
Our signature "New Old Home" — architecturally inspired by 18th and 19th-century New England tradition, built with today's energy-efficient technology and open-plan living. It looks 200 years old. It performs like it was built yesterday.
- Full custom design-build under one roof
- Classic New England exterior styles
- Open floor plans & modern interiors
- Net-zero and energy-efficient systems
- Fixed-price contract before we break ground
Home Remodeling & Large-Scale Updates
We transform the home you're in into the home you've always wanted — without the chaos of managing multiple contractors. One team, one point of contact, and a process built around minimizing disruption to your daily life.
- Whole-house remodels
- Kitchen updates & expansions
- Master suite upgrades
- Basement finishing
- Historic restoration & revitalization
- Home Additions & Great Rooms
- Carriage Home Builds
Additions & Great Rooms
Growing families, changing needs, or simply craving more space - a thoughtfully designed addition expands your home without sacrificing its architectural character. We design additions that look like they were always meant to be there.
- Great room & family room additions
- Master suite & bedroom additions
- Garage additions with living space above
- Mudroom & entryway expansions
- Seamless architectural integration
In-Law Suites, ADUs & Carriage Houses
- Attached & detached in-law apartments
- Accessory Dwelling Units
- Carriage house conversions
- Custom workshops & barns
- Multi-generational home design

Energy-Efficient and High-Performance Homes
High-performance homes are designed to improve comfort, efficiency, and long-term durability—not just reduce energy use.
For many homeowners, this means a home that feels better to live in every day: consistent temperatures, fewer drafts, improved air quality, and systems that work together seamlessly.
Today’s high-performance homes often incorporate advanced energy systems and technologies, including:
- Solar-ready or solar-integrated energy systems
- High-efficiency heat pumps for heating and cooling
- Geothermal systems for long-term energy stability
- Advanced insulation and air sealing strategies
- High-performance windows and doors
- Balanced ventilation systems for healthier indoor air
- Moisture control systems that protect the home over time
These elements work together to reduce energy consumption while creating a more comfortable, resilient, and future-ready home.
Gilmore Building Co. integrates these systems early in the design-build process, ensuring that architectural design, building systems, and energy performance are aligned—so your home not only looks exceptional, but performs at a high level for years to come.
A FEW REVIEWS BY OUR CLIENTS
"While relocating to New England, we researched 100's of homes on-line and through site visits until our real estate agent showed us a new old home designed and built by Gilmore. Upon arrival at this home, we were immediately impressed by the unique yet classic look of the exterior. The interior layout and detailing showed there are still builders who are proud of what they do. When you see quality, you know it ...."
"The level of professionalism Gilmore brings to a project is excellent. The design and build process really allowed us to explore and then narrow the project's scope of work with ease. No other company could have applied the knowledge and architectural expertise needed to help us achieve the historic appearance goals we had. The completed project exceeded our goals."
"We can't say enough wonderful things about the work completed and the satisfying experience we had teaming with Gilmore Building Co. Our project came in ahead of schedule and right on budget. We love our new addition and our new kitchen and bath. We would recommend Gilmore Building Co. for any project."
"After a long search, my wife and I found in the Gilmore Building Co. homes everything we believed to be important in a new home. From the classic New England styling, abundant trim work, top of the line mechanicals and hardware, exceptional layout of the kitchen, custom cabinets and high quality appliances. The quality and craftsmanship built into our home was obvious from the street but even more so when you step through the front door."
"My husband and I spent over a year working with an architect to design our summer home for our family. The execution, workmanship and temperament of the builder were critical to us. Gilmore Building Co. surpassed our expectations throughout the very satisfying process."
"We chose to work with Gilmore Building Co. because they presented themselves as offering a detailed project scope and budget, high-quality work and overall excellent communication. And indeed that is what we received - an overall seamless and successful project with a level of customer service and detail not normally seen in this industry. We would highly recommend Gilmore Building Company and look forward to working with them again on future projects."
Where We Work
Gilmore Building Co. works throughout Boston MetroWest & Central MA, providing high-quality remodeling, custom homes, and additions tailored to each homeowner’s needs.
Our team brings reliable craftsmanship, thoughtful design, and local expertise to every project, ensuring a smooth process and results that enhance both function and value.
Our Service Area
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Grafton
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Westborough
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Southborough
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Northborough
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Hopkinton
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Sutton
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Upton
- Shrewsbury
- Boylston
- Needham
- Carlisle
- Westford
- Harvard
- Sudbury
- Berlin
- Sturbridge
- Oxford
- Millbury
- Newton
- Natick
- Wellesley
- Holliston
- Stow
