ADU builder in Norfolk County
Jennifer Construction designs and builds Accessory Dwelling Units (ADUs) throughout Norfolk County, Massachusetts. Whether you're planning a detached backyard cottage, an attached in-law suite, or a garage or basement conversion, our local crew handles the whole project — from permitting through final finishes — for homeowners across 23 communities in the county.
Free ADU Consultation
Serving Norfolk County homeowners.
Building an ADU by right in Norfolk County.
Under the Massachusetts Affordable Homes Act (effective February 2, 2025), a single ADU of up to 900 sq ft is allowed by right in single-family zoning districts — including throughout Norfolk County — with no special permit required. Standard building permits and local dimensional rules still apply, and we manage the Norfolk County permitting process on your behalf.
Homeowners across Norfolk County — in Franklin, Marlborough, Plainville, Weymouth, Holbrook and beyond — are using ADUs to house family, generate rental income, and add long-term value. We tailor each Norfolk County ADU to the lot, the existing home, and local building requirements.
ADU types we build in Norfolk County.
Detached ADU
A standalone backyard cottage — the most private and flexible option, ideal for rental income or multigenerational living.
Attached ADU
A new addition connected to your existing home, such as an in-law suite with its own entrance, kitchen, and bath.
Conversion ADU
Converting existing space — a garage, basement, or attic — into a fully independent dwelling unit.
How we build your Norfolk County ADU.
- 1
Free Consultation
We review your lot and goals and confirm what your zoning allows by right.
- 2
Design & Feasibility
We plan the ADU type, size, and layout and prepare drawings for permitting.
- 3
Permitting
We file the application and coordinate with your city or town's building department.
- 4
Construction
Our insured crew builds it end to end — site work, foundation, framing, roof, siding, and interior finishes.
- 5
Final Inspection & Handover
We pass inspection, walk you through the unit, and back the work with our warranty.
ADU construction throughout Norfolk County.
We serve homeowners in these Norfolk County communities and the surrounding area.
ADU questions in Norfolk County.
Can I build an ADU by right in Norfolk County?+
Yes. Statewide Massachusetts law allows one ADU of up to 900 sq ft by right in single-family zoning districts throughout Norfolk County, without a special permit. Local building requirements still apply, and we handle them for you.
Which Norfolk County towns do you build ADUs in?+
We build ADUs across all of Norfolk County, including Franklin, Marlborough, Plainville, Weymouth, Holbrook and surrounding communities. Call (774) 240-6147 to schedule a free on-site consultation.
Do you handle ADU permitting in Norfolk County?+
Yes. Jennifer Construction is fully licensed and insured in Massachusetts, and we file the permit application and coordinate inspections with your Norfolk County municipal building department as part of the project.
How much does an ADU cost in Norfolk County?+
ADU cost depends on the type, size, and site conditions, so we price each Norfolk County project after a free consultation rather than a generic quote. We also offer financing to help spread the investment.
Thinking about an ADU in Norfolk County?
Get a free, no-obligation consultation and find out what your Norfolk County lot allows by right.