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Avalon Building Systems is a Canton modular home builder, and in a 2024 Google review a customer said the company built a small Cape-style house for their mom and managed every aspect of the project, so the customer did not have to coordinate with subcontractors. That 2024 customer also said each phase was completed on time. A 2025 Google customer said the company was professional, reliable and very easy to work with on their home. The company describes itself as a builder of custom modular and prefabricated homes and commercial modular buildings, offering turnkey construction across eastern Massachusetts, Cape Cod and the Islands. Its website says Paul Oliveira founded it after building his own modular home in 2001. A naahq.org page quotes owner Paul Oliveira saying the company has put together more than 25 multifamily buildings across several Northeastern states. Its Massachusetts home improvement contractor registration, number 139771, is active on the state registry. The Better Business Bureau grades it A+. A 2023 blockislandtimes.com article reported a bid in which Avalon would provide the modular units while Buffalo Builders acted as general contractor; that bid was $7,580,538. A 2021 mvtimes.com article named Canton-based modular home builder Avalon Building Systems among the partner companies on an Onyx Group proposal. In a 2019 BuildZoom review, a customer said a new construction project was lacking flashing and building wrap, resulting in extensive moisture damage, water damage and water leakages. That 2019 customer said the company refused to honor the warranty.
“The second bid came from Avalon Building Systems, which teamed up with Buffalo Builders to come up with a proposal. Avalon would provide the modular units, while Buffalo Builders would act as general contractor and perform all the finish work. The amount of the bid was $7,580,538.”
“The Roxbury-based Onyx Group representatives presented a proposal with representatives from the following partner companies for the project: Cambridge-based Galante Architect Studios, Norwood-based CES Engineering, Canton-based modular home builder Avalon Building Systems, and Reading-based engineering and environmental services firm Weston & Sampson. ... Paul Oliveira from Avalon Building Systems said the construction will be done using modular homes. Recycled materials will be used, and labor from the local workforce will be prioritized. The modular homes will be built throughout the year, a”
“Avalon Building Systems, based in Canton, Mass., has put together more than 25 multifamily buildings totaling approximately 1,000 units across several Northeastern states, says Owner Paul Oliveira”
Professional, reliable and very easy to work with. Did a fantastic job on our home. Highly recommended and will use again
I recently had the pleasure of working with Avalon Building Systems to construct a small Cape-style house for my mom, and I couldn't be more pleased with the results. The experience was very professional. One of the standout aspects of Avalon is their commitment to using high-quality materials. Every detail, from the sturdy framing to the elegant finishes, reflects a high level of craftsmanship. The house not only looks beautiful but also feels solid and well-built, giving me confidence that it will stand the test of time. Another major advantage of working with Avalon was that I didn't have to worry about coordinating with subcontractors. They managed every aspect of the project, ensuring that each phase was completed on time and to the highest standards. This turnkey approach allowed me to focus on the exciting parts of the process, like selecting finishes and envisioning how my mom would enjoy her new home, rather than getting bogged down in the details. Overall, Avalon Building Systems delivered exactly what I was hoping for.
SF new construction project was lacking flashing and building wrap, resulting in extensive moisture damage, water damage, and water leakages. Company refused to honor warranty.
I recently had the pleasure of working with Avalon Building Systems to construct a small Cape-style house for my mom, and I couldn't be more pleased with the results. The experience was very professional.
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1 change recorded — last scanned Sep 19, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Avalon Building Systems. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
Reviewers return for a second or third project4.5
Repeat customers4.4
Permitted 100A-to-200A panel upgrade4.2
Established permit historyNot yet rated
Built a custom duplex with permit handling4.3
