ADU Construction in Braintree MA — In-Law Suites, Garage Conversions & More
Boston Smart Plastering builds accessory dwelling units throughout Braintree, MA. Braintree is a prosperous South Shore suburb 11 miles south of Boston with a mix of mid-century colonials, newer construction, and active commercial development. Boston Smart Plastering serves Braintree homeowners and businesses across all 14 of our service trades. 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 Braintree homeowners can make. Braintree's residential neighborhoods feature primarily post-war construction — 1950s through 1980s colonials and split-levels now reaching the age where major renovation work becomes necessary. Kitchen and bathroom remodeling, insulation upgrades, and exterior work are particularly strong demand areas in Braintree. 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. Braintree is 11 miles south of Boston at the junction of Routes 3 and 128, making it highly accessible from Greater Boston.
Frequently asked questions
How much does it cost to build an ADU in Braintree MA?
ADU costs in Braintree 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 Braintree property.
Do I need a permit for an ADU in Braintree MA?
Yes — all ADU construction requires building permits. Under the 2024 Massachusetts ADU law, most Braintree properties can add an ADU by-right. We handle all permit applications for Norfolk County on your behalf.