ADU builder in Plymouth County
Jennifer Construction designs and builds Accessory Dwelling Units (ADUs) throughout Plymouth 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 18 communities in the county.
Free ADU Consultation
Serving Plymouth County homeowners.
Building an ADU by right in Plymouth 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 Plymouth County — with no special permit required. Standard building permits and local dimensional rules still apply, and we manage the Plymouth County permitting process on your behalf.
Homeowners across Plymouth County — in Abington, Bridgewater, Brockton, Carver, Cohasset and beyond — are using ADUs to house family, generate rental income, and add long-term value. We tailor each Plymouth County ADU to the lot, the existing home, and local building requirements.
ADU types we build in Plymouth 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 Plymouth 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 Plymouth County.
We serve homeowners in these Plymouth County communities and the surrounding area.
ADU questions in Plymouth County.
Can I build an ADU by right in Plymouth County?+
Yes. Statewide Massachusetts law allows one ADU of up to 900 sq ft by right in single-family zoning districts throughout Plymouth County, without a special permit. Local building requirements still apply, and we handle them for you.
Which Plymouth County towns do you build ADUs in?+
We build ADUs across all of Plymouth County, including Abington, Bridgewater, Brockton, Carver, Cohasset and surrounding communities. Call (774) 240-6147 to schedule a free on-site consultation.
Do you handle ADU permitting in Plymouth County?+
Yes. Jennifer Construction is fully licensed and insured in Massachusetts, and we file the permit application and coordinate inspections with your Plymouth County municipal building department as part of the project.
How much does an ADU cost in Plymouth County?+
ADU cost depends on the type, size, and site conditions, so we price each Plymouth 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 Plymouth County?
Get a free, no-obligation consultation and find out what your Plymouth County lot allows by right.