What Is an ADU and Why Home Additions Are Growing in Massachusetts
4 November 2025
Homeowners across Massachusetts are finding creative ways to add more space and value
to their properties — without moving. Two of the most popular options in 2025 are home additions
and ADUs (Accessory Dwelling Units). But what’s the difference, and which one is right for you?
At Resant Improvement LLC, we help families design and build new living spaces that fit their lifestyle, whether that means a new bedroom, in-law suite, or full second-story addition.
What Is an ADU?
An ADU, or Accessory Dwelling Unit, is a small, independent living space
built on the same property as your main home.
It usually includes its own kitchen, bathroom, and private entrance, and can be attached to your house, built over a garage, or stand alone in the backyard.
Homeowners build ADUs for:
- In-law or family suites
- Rental income or Airbnb units
- Guest houses or studios
- Aging parents who want independence but stay close
Massachusetts towns have been making it easier to build ADUs in recent years — offering more flexible zoning laws and incentives for multi-generational living.
How Is a Home Addition Different?
A home addition
expands your existing home rather than creating a separate unit.
This could mean adding a new bedroom, kitchen, bathroom, or even an entire floor.
Additions are perfect if you need more living space for a growing family but love your current neighborhood.
Common types of additions:
- New master suite or family room
- Second-story or garage additions
- Kitchen or bathroom extensions
- In-law apartments connected to the main house
Benefits of Adding Space to Your Home
- Increase your property value
- Avoid the high cost of moving
- Customize your home for comfort and function
- Generate rental income with an ADU
- Support multi-generational living for family members
Choosing the Right Option for You
If you want more living space inside your home, a traditional addition may be your best choice.
If you want a separate, self-sufficient space for family or rental income, an ADU is ideal.
Either way, Resant Improvement handles everything — from design and permits to framing, plumbing, and finishing.
Related Links:
Accessory Dwelling Units Officially Allowed Statewide
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