Small shingled cottage with a red door near the water in Chatham, MA

ADUs, Bourne, MA

ADU Builder in Bourne, MA

Mussato Building Group designs, permits, and builds ADUs in Bourne, MA, from detached guest cottages to in-law suites and garage conversions. We are a family-owned general contractor founded in 2004, with more than 100 projects completed and a 5.0 rating from 21 Google reviews. Our base in South Yarmouth is about 28 miles away, and we work across Buzzards Bay, Sagamore, Sagamore Beach, Bournedale, Pocasset, Cataumet, and Monument Beach.

Family-owned since 2004
Licensed + insured in MA
100+ projects completed
5.0 stars from 21 Google reviews
BBB accredited

Get a Free Estimate Call (774) 487-4938

Local Work

Building an ADU in Bourne

Bourne is the only Cape town on both sides of the Cape Cod Canal, from Buzzards Bay and Sagamore on the mainland side to Pocasset, Cataumet, and Monument Beach on the Cape side.

State law allows one ADU of up to 900 square feet by right on most single-family lots, and that includes Bourne. What usually decides the project here is the lot and the septic system: an ADU with a bedroom adds to the bedroom count the system has to carry under Title 5, so we start with the Bourne Board of Health.

Brick path and gardens leading to a detached guest cottage with a red door

What Clients Say

“Mussato Building Group has been a loyal and trusted partner of ours for over ten years and one hundred projects. Their professionalism and quality of work are second to none. We look forward to working with them far into the future.”

Jason, Long-term partner, Cape Cod, MA

Permits & Approvals

ADU permits in Bourne

We prepare the drawings, file the applications, and schedule the inspections. Here is what a project like this usually needs:

Building permit from the Bourne Building Department, and a certificate of occupancy at the end.
Review by the Bourne Board of Health of septic capacity under Title 5 if the ADU adds a bedroom.
Zoning review of setbacks, height, and lot coverage under the Bourne zoning bylaw.
Conservation Commission review if the ADU is within 100 feet of a wetland, coastal bank, dune, or salt marsh.
Flood-zone design if FEMA maps the lot in an AE or VE zone.

What we build in Bourne

Detached ADUs and guest cottages
Attached ADUs and in-law suites
Garage and lower-level conversions
Kitchens and bathrooms sized for small spaces
Foundations, framing, and exteriors matched to the main house
Heat, hot water, and electrical for a second dwelling
Zoning, septic, and permit coordination
Site work and paths between the houses

Questions

ADU Builder in Bourne: FAQ

Can I build an ADU in Bourne?

In most cases, yes. State law allows one ADU of up to 900 square feet, or half the size of the main house if that is smaller, by right on single-family lots in Bourne. Setbacks, septic capacity, and conservation rules still apply, so we check your lot first.

Do you build ADUs in Buzzards Bay and Sagamore?

Yes. We build detached and attached ADUs all over Bourne, including Buzzards Bay, Sagamore, Sagamore Beach, Bournedale, Pocasset, Cataumet, and Monument Beach. Our base in South Yarmouth is about 28 miles away.

Will my septic system handle an ADU in Bourne?

Buzzards Bay village has town sewer, and most of the rest of Bourne is on septic. On septic, Title 5 sizes the system by bedroom count, so an ADU with a bedroom can mean a septic upgrade. The Bourne Board of Health reviews it before the building permit.

Can I rent out an ADU in Bourne?

Long-term rentals are allowed, and the town cannot require you to live on the property. Short-term rentals of an ADU can be restricted by the town, so check the Bourne rules before you plan on summer rentals.

Nearby

More in and around Bourne

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