What is an ADU?
A second home on your own property.
An ADU, Accessory Dwelling Unit, is a fully independent living space built on the same lot as your main home. It has its own entrance, kitchen, and bathroom. Think of it as a small house in your backyard.
It can be a studio or a 1–2 bedroom. It can house a family member, a tenant, or a guest. And in Massachusetts, it's now legal on virtually every single-family lot in the state, no special permits, no town votes required.
Massachusetts Affordable Homes Act — 2024
Massachusetts passed landmark legislation making ADUs a by-right use for single-family homeowners statewide. That means if you own a home here, you very likely already have the right to build one.
Read the official regulation →
Why homeowners build one
What will you use yours for?
Every situation is different. Here are the four most common reasons Massachusetts homeowners are adding an ADU right now.
Rental Income
Rent your ADU to a long-term tenant and cover a significant portion of your mortgage payment each month, or all of it.
Family First
Keep aging parents close or give your adult kids a place of their own, without anyone having to leave the property.
Downsize & Stay
Move into the ADU, rent out the main house. Simplify your life without giving up your property or neighborhood.
Property Value
An ADU adds a meaningful second unit to your deed and a proven increase to your home's market value.
ADU Models
All models are built in our Massachusetts factory, delivered to your lot, and finished turnkey.
Choose what fits your property and your goals.
How It Works
Simple. Transparent. Local.
We handle everything from your first call to handing you the keys. No contractors to manage. No permitting headaches.
01
Step 01
Free Consultation
Tell us about your property and goals. We'll tell you exactly what's possible.
02
Step 02
Design & Permitting
We design your unit and handle all town permitting. You don't chase anyone.
03
Step 03
Built Off-Site
Your ADU is built in our Massachusetts factory while your yard is untouched.
✓
Step 04
Delivered & Done
Set on your lot in one day. Finished, inspected, and ready to live in or rent out.
Zero Headaches
Permits, inspections, contractors. We handle all of it so you don't have to think about it.
A Timeline You Can Trust
No open-ended construction dragging on for months. You know the date before we break ground.
Built in a Factory, Not Your Yard
Your property stays clean and quiet while we build. The unit arrives ready to go.
One Team, Start to Finish
Design, permits, build, delivery. You have one point of contact and one contract.
Why MassDwell?
We built this company for Massachusetts homeowners.
Most people dread the idea of construction. The delays, the contractors who don't show up, the permits that take forever, the budget that quietly grows. We built MassDwell because that experience doesn't have to be the norm.
Building something new at home should feel good. It should be something you talk about at the dinner table, plan together as a family, and actually look forward to seeing finished. We're here to make it come true.
Talk to our team
Get Started
Curious what an ADU could do for your property?
Fill out the form for a free, no-commitment estimate. Or call directly.
Call or text anytime
(781) 531-8593
No commitment. No pressure.
You'll get a real conversation, not a sales script. We'll look at your property, explain what's possible, and give you an honest estimate.