ADU Construction in Randolph MA — In-Law Suites, Garage Conversions & More
Boston Smart Plastering builds accessory dwelling units throughout Randolph, MA. Randolph is a diverse and accessible suburban community in Norfolk County, 12 miles south of Boston, with a strong mix of single-family neighborhoods and multi-family housing. Boston Smart Plastering serves Randolph homeowners and property owners 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 Randolph homeowners can make. Randolph's housing stock includes substantial post-war construction — 1950s through 1980s single-family homes and multi-family properties throughout the town. Older homes generate demand for plastering, drywall, and painting, while the active real estate market drives kitchen and bathroom remodeling, flooring installation, and junk removal for property turnover. 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. Randolph is 12 miles south of Boston off Route 28 and accessible from I-93, centrally located in our South Shore service footprint.
Frequently asked questions
How much does it cost to build an ADU in Randolph MA?
ADU costs in Randolph 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 Randolph property.
Do I need a permit for an ADU in Randolph MA?
Yes — all ADU construction requires building permits. Under the 2024 Massachusetts ADU law, most Randolph properties can add an ADU by-right. We handle all permit applications for Norfolk County on your behalf.