Build Smart, Live Better — Custom ADUs for Massachusetts
Accessory Dwelling Units (ADUs) South Shore, MA
At John Crowley Construction, we specialize in designing and building Accessory Dwelling Units (ADUs)—modern, efficient living spaces that add value, flexibility, and functionality to your property.
Serving Plymouth, Hanover, Kingston, Hanson & Surrounding South Shore Communities
Expert Residential Design & Construction
Design & Build ADUs on the South Shore
Whether you’re creating a mother-in-law suite, a rental unit for additional income, or a private home office or guest house, our team delivers turnkey ADU construction services throughout the South Shore of Massachusetts.
Our ADUs are crafted to meet your needs and comply with local building codes, ensuring beauty, comfort, and practicality in every design.
Serving Pembroke, MA, and proudly serving the South Shore, including Hanover, Norwell, Hingham, Cohasset, Scituate, Duxbury, Marshfield, Kingston, and Plymouth, we specialize in custom bathroom renovations that elevate the beauty and functionality of your home.
ADU vs. Home Addition: Which is Right for the South Shore, MA
Design & Build ADUs on the South Shore
What Is an ADU?
Licensed & Insured General Contractor
An Accessory Dwelling Unit (sometimes called an in-law suite, granny flat, or backyard cottage) is a smaller, self-contained residential unit built on the same property as your main home. ADUs can be attached, detached, or converted spaces within existing structures such as garages or basements.
They include essential living features—kitchen, bathroom, sleeping area, and separate entrance—providing privacy and independence while staying close to family.
Types of ADUs We Build
We offer a variety of design options tailored to your property, lifestyle, and budget:
- Detached ADU: A stand-alone structure, ideal for guest houses or rental income.
- Attached ADU: An addition connected to your main home, often used for extended family living.
- Garage Conversion: Transform your unused garage into a livable apartment or studio.
- Basement ADU: Maximize existing space by creating a lower-level suite with private access and egress.
Many homeowners ask: “Can I build an ADU in Pembroke or Plymouth, MA?” — the answer is yes, with proper design, permits, and construction handled by our experienced team.
Build an Accessory Dwelling Unit (ADU) in Massachusetts