What Is an ADU? Everything Massachusetts Homeowners Should Know
If you’re a Massachusetts homeowner exploring ways to create more living space, generate rental income, or support multigenerational living — you’ve probably heard the term ADU. But what exactly is an ADU, and why are so many homeowners in Massachusetts jumping on board?
Let’s break it down.
✅ What Does ADU Stand For?
ADU stands for Accessory Dwelling Unit — a secondary housing unit located on the same lot as a primary single-family home. Think of it as a smaller, independent living space that shares the property with your main house.
ADUs are also called:
- In-law apartments
- Backyard cottages
- Guest houses
- Basement apartments
- Granny flats
They typically include a kitchen or kitchenette, bathroom, bedroom/living space, and private entrance.
🏠 Types of ADUs
There are several ways to build an ADU depending on your lot and needs:
- Detached ADU: A separate building, often in the backyard
- Attached ADU: Built as an addition to your main house
- Garage Conversion: Transforms an existing garage into living space
- Basement ADU: Converts a finished basement into an independent unit
- Interior Conversion: Uses extra rooms or additions within your main home
📜 Why Are ADUs a Big Deal in Massachusetts?
In 2024, Massachusetts passed a new housing law that allows ADUs “by right” in many communities — especially on single-family residential lots. That means homeowners no longer need a special permit in many areas if their ADU meets local guidelines.
This is a game-changer for homeowners looking to:
- Create rental income
- Provide housing for family
- Age in place
- Increase home value
ADULink helps you check your city’s rules and determine if your property qualifies — for free.
👉 [Check My Property’s Eligibility]
💰 What Does It Cost to Build an ADU?
The cost of building an ADU varies depending on the type, size, and site conditions.
Typical starting costs:
- Studio: From $110,000
- 1-Bedroom: From $135,000
- 2-Bedroom: From $160,000
- Conversions (garage/basement): Priced case-by-case
Financing is available — including $0 down loan options and cash-out refinancing.
💡 What Are the Benefits of an ADU?
Here’s why homeowners love ADUs:
- ✅ Rental income from long-term tenants
- ✅ Private housing for parents, adult kids, or caregivers
- ✅ Increased property value
- ✅ Flexible living for changing life stages
- ✅ Sustainable use of existing land
📋 Are There Any Restrictions?
Yes — while the state has opened the door, each city or town may still have rules about:
- Maximum size
- Height and setbacks
- Parking requirements
- Owner-occupancy
- Utility hookups
That’s where ADULink comes in. We handle zoning research and permitting so you don’t have to.
👉 [Book a Free Consultation]
🎯 Should You Build an ADU?
If you’re a Massachusetts homeowner with a vision to add space, generate income, or plan for the future — an ADU may be the smartest investment you can make.
At ADULink, we manage the entire process from idea to move-in.
✅ Zoning & permits
✅ Design & financing
✅ Construction oversight
✅ Final inspection
📞 Ready to get started?
Let’s find out if your property qualifies.
👉 [Schedule My Free ADU Consultation]