A Decision Guide

Which kind of accessory dwelling unit fits your property?

Massachusetts opened ADUs by-right statewide in February 2025, and other New England states are moving similarly. For homeowners that’s a real opportunity — but the right kind of ADU for your property, family, and goals depends on factors most homeowners haven’t worked through yet. This guide will help.

Time: About 3 minutes
Questions: Seven, about your property and what you’d like the ADU to do
What you’ll get: A reasoned recommendation — including when it’s too soon to choose

Why this path likely fits you

Pitfalls to watch for

What to bring to your first architect meeting

Schedule a consultation

This guide offers general direction based on common factors. ADU rules vary by state and by town, change frequently, and depend on property-specific conditions like septic capacity, lot dimensions, and existing zoning nonconformities. A qualified architect and your local building department should evaluate your specific situation before any decision is final.