What Is an Accessory Dwelling Unit (ADU)?

What Is an Accessory Dwelling Unit?

An Accessory Dwelling Unit is a secondary residential living space located on the same property as a primary residence. Unlike a traditional home addition that simply expands the existing house, an ADU functions as an independent living unit with its own essential amenities.

A typical ADU includes:

• A kitchen or kitchenette
• A bathroom
• A living area
• Sleeping accommodations
• Separate access from the primary residence

According to Massachusetts housing guidelines, ADUs are designed to provide independent living accommodations while remaining accessory to the main home. Homeowners interested in learning more about state guidelines can review the official Massachusetts resource on Accessory Dwelling Units.

As demand for flexible housing continues to grow, many homeowners are exploring accessory dwelling unit construction as a way to improve the functionality and long-term value of their property.

Accessory Dwelling Units offer homeowners a unique opportunity to increase living space, improve property functionality, and create long-term value. Whether used for multigenerational living, rental income, guest accommodations, or future flexibility, ADUs provide solutions that traditional home improvements often cannot match.

As more homeowners discover the benefits of ADUs and Massachusetts continues to support alternative housing options, these versatile living spaces are becoming one of the smartest investments available for residential properties today.