ADU Construction in Brookline MA — In-Law Suites, Garage Conversions & More
Boston Smart Plastering builds accessory dwelling units throughout Brookline, MA. Brookline is one of Greater Boston's most desirable and densely populated communities — an inner suburb completely surrounded by Boston, known for its historic architecture, tree-lined streets, and some of the most valuable residential real estate in Massachusetts. Boston Smart Plastering works extensively throughout Brookline on plaster restoration, high-end renovations, and historic home preservation projects. 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 Brookline homeowners can make. Brookline's housing stock is dominated by significant historic properties — late Victorian and early 20th century single-family homes, multi-family brownstones, and landmark buildings throughout neighborhoods like Coolidge Corner, Chestnut Hill, and Washington Square. These older properties require specialized plastering expertise, historic restoration skills, and high-end interior finishing. 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. Brookline is surrounded by Boston and sits just 4 miles west of Downtown — one of our closest and most frequently served communities.
Frequently asked questions
How much does it cost to build an ADU in Brookline MA?
ADU costs in Brookline 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 Brookline property.
Do I need a permit for an ADU in Brookline MA?
Yes — all ADU construction requires building permits. Under the 2024 Massachusetts ADU law, most Brookline properties can add an ADU by-right. We handle all permit applications for Norfolk County on your behalf.