ADU and Small Home Regulations in Massachusetts

The first step is knowing the rules

If you are interested in installing a granny flat (accessory dwelling unit), your first step is to review your local rules. Each town has differing rules relating to which zones ADUs can be installed in, maximum size, or rental restrictions.

Find your cities ADU Rules:

Can’t find your city? We’ll research it.

Western Mass Cities That Allow ADUs:

Cape Cod Cities That Allow Oversized Tiny Homes:

Greater Boston Cities That Allow ADUs:

Below is the full list of cities and town we’ve evaluated in Massachusetts.

Bold font indicates detached ADUs (backyard tiny homes) are allowed.

** indicates detached ADUs are allowed By Right in at least one zoning district (this is a good thing)

Don’t see your city? We’ll research it.