ADU Construction in Canton MA — In-Law Suites, Garage Conversions & More
Boston Smart Plastering builds accessory dwelling units throughout Canton, MA. Canton is a well-regarded suburban town in southern Norfolk County at the junction of I-93 and Route 138, known for its strong schools, established neighborhoods, and easy highway access. Boston Smart Plastering serves Canton homeowners across all trades with the same in-house crew and free in-person estimates we bring to every project. Whether you want a basement apartment, garage conversion, attached in-law suite, or detached backyard cottage, we manage every phase from permits to final finishes.
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ADUs are one of the smartest investments Canton homeowners can make. Canton's housing stock features a mix of older colonials near Canton Center and newer developments throughout the town — including significant construction activity generating demand for new construction finishing, insulation, drywall, and painting. The town's affluent character supports strong demand for high-end kitchen and bathroom renovations. Under Massachusetts ADU law, most single-family properties in Norfolk County can now add an ADU by-right. Boston Smart Plastering handles the full build — design, permitting, construction, and Certificate of Occupancy. Canton is 16 miles south of Boston at the I-93 and Route 138 interchange, easily accessible from our Greater Boston base.
Frequently asked questions
How much does it cost to build an ADU in Canton MA?
ADU costs in Canton vary by type. A basement conversion typically runs $80,000–$150,000. A detached cottage can cost $180,000–$350,000+. We provide a detailed estimate after visiting your Canton property.
Do I need a permit for an ADU in Canton MA?
Yes — all ADU construction requires building permits. Under the 2024 Massachusetts ADU law, most Canton properties can add an ADU by-right. We handle all permit applications for Norfolk County on your behalf.