Curious About Adding an ADU to Your Property?
Planning an ADU? Start Here.
Learn the basics of building an ADU in Massachusetts, including zoning, permitting, costs, and design options for detached, attached, garage conversion, and prefab ADUs.
Prefab vs. Stick-Built ADUs in Massachusetts
At Mass ADU, we offer both prefab and stick-built ADUs because every property and homeowner goal is different.
Prefab ADUs are built off-site and installed on your property. This approach allows for a faster, more predictable timeline with fewer weather delays. It’s a strong option for homeowners who want efficiency and a streamlined build process.
Stick-built ADUs are constructed entirely on-site and fully customized to your property. This gives you more flexibility with layout, design, and positioning—especially important for lots with zoning constraints or unique conditions.
Our approach is simple:
We don’t push one option over the other. We evaluate your lot, zoning, budget, and long-term goals, then guide you toward the solution that actually makes sense—not just what’s easier to sell.
ADU 101 Workshop: Can You Build an ADU on Your Property in Massachusetts?
MASS ADU helps Massachusetts homeowners understand whether they can build an accessory dwelling unit on their property. Learn how lot layout, zoning, setbacks, utilities, and home configuration affect ADU feasibility plus what towns can and can’t require under current MA law.
January ADU Workshop: Understanding the Basics and Process
Join our free virtual ADU Workshop on January 14th at 6:30 PM to learn the basics and process of creating an Accessory Dwelling Unit in Massachusetts. We’ll cover what ADUs are, how the new state laws work, and what to expect from start to finish, from initial planning to final approval. Bring your questions, there’s a live Q&A at the end.