Massachusetts ADU Checker

Could an ADU work
on your property?

Answer a few questions for a preliminary screen based on Massachusetts statewide ADU rules. No address or contact information required.

Property basics

Start with the home and its local context.

Municipality

Current zoning or property context

Single-family residential districtTwo-family, multifamily, or otherNot sure

Main home gross floor area

sq. ft.

Your ADU concept

Tell us what you are considering.

Approximate ADU floor area

sq. ft.

ADU type

How many ADUs are planned?

One ADUMore than one

Site checks

These items can affect parking and separate approvals.

Within 0.5 mile of a qualifying transit station?Wastewater serviceKnown site concern

We do not ask for your address, name, email, or phone number.

Important limitation

This checker is an educational preliminary screen—not a permit determination, zoning opinion, design, estimate, or legal advice. Rules and property conditions vary. Confirm current requirements with the municipality and qualified design, engineering, building, fire, and wastewater professionals before making project decisions.

Massachusetts ADU law 760 CMR 71.00 Official ADU FAQs

Could an ADU workon your property?

Property basics

Your ADU concept

Site checks

Important limitation

Could an ADU work
on your property?