Accessory dwelling units are gaining real traction across the Commonwealth. New data from the Executive Office of Housing and Livable Communities shows that homeowners submitted 1,639 ADU applications statewide in 2025, with local building departments ultimately permitting 1,224 projects.
The numbers reflect growing interest in a housing option that was difficult to build just a few years ago. The full story was reported by HOT 96.9 Boston and can be read here.
What Changed to Drive This Growth
In August 2024, Governor Healey signed a $5.1 billion housing bill that included a significant policy shift. The legislation authorized accessory dwelling units to be constructed “by right” in single-family zoning districts across all communities. That change removed many of the approval barriers that previously made ADU projects difficult or impossible to pursue.
For homeowners in Greater Boston, Worcester, and surrounding areas, this meant a faster, clearer path to adding a second unit on their property. Theodore Labonte notes that removing the need for special permits or variances has made planning timelines more predictable, which helps homeowners move forward with confidence.
New Funding Support for ADU Construction
In December 2025, the Healey administration rolled out a Massachusetts Housing Partnership program designed to assist homeowners with building accessory dwelling units. The initiative is backed by $10 million in available funding and offers financial support to reduce upfront costs.
This type of funding can make the difference for homeowners who see the value in adding an ADU but need help covering design, permitting, or early construction expenses. Theodore Labonte often advises clients to explore available programs early in the planning process to understand what resources may apply to their project.
Why Homeowners Are Choosing ADUs
Accessory dwelling units serve multiple purposes. Some homeowners build them to provide housing for aging parents or adult children. Others use ADUs as rental income sources that help offset mortgage or property costs. In tight housing markets like Worcester and Greater Boston, ADUs also offer a way to add housing supply without purchasing additional land.
The units typically range from small studio layouts to larger one- or two-bedroom configurations. They can be built as detached structures, garage conversions, or additions to existing homes, depending on lot size and local requirements.
What to Consider Before Building
While the approval process has improved, ADU projects still require careful planning. Homeowners should consider site conditions, utility connections, zoning setbacks, and design requirements before deciding on a project. Working with experienced contractors who understand local building codes helps avoid delays and unexpected costs.
The data from 2025 shows that when regulatory barriers come down, homeowners respond. For those considering an ADU in 2026, the combination of streamlined approvals and available funding creates a more favorable environment than the market has seen in years.
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