Report: Massachusetts zoning reform not enough to stimulate ADU production

Massachusetts cities issued over 1,200 applications for ADUs in the last year, short of the Healey administration's goal of 1,600 to 2,000 units per year.

2 minute read

May 24, 2026, 5:00 AM PDT

By Diana Ionescu @aworkoffiction


Rendering of green one-story ADU home.

Design for an accessory dwelling unit. | Studio Den Den / Massachusetts ADU Design Challenge

A new Massachusetts law legalizing ADUs has not yielded as much new housing production as state officials anticipated, reports Jennifer Smith in the Commonwealth Beacon. "Massachusetts municipalities received more than 1,600 applications for accessory dwelling unit permits and issued more than 1,200 in the past year. That is a sizable increase from the few hundred ADUs constructed over the past decades through local policies, but falls short of what advocates say is needed, and short of the Healey administration’s own target of 1,600 to 2,000 units per year."

According to a report from Abundant Housing Massachusetts, complex local permitting processes and local wetlands and sewer regulations are contributing to slow growth in the ADU sector. "The report argues the permitting gap doesn’t reflect a lack of homeowner interest, but rather a regulatory system that was never designed to handle an influx of development of the small housing units across 351 cities and towns with their own set of permitting rules."

The report suggests that the state should consolidate more control over regulations to make it easier for homeowners to build ADUs. "Even if, on paper, our law is stronger than some other states, the unique aspects of local control and fragmented permitting and regulatory oversight of new housing development in Massachusetts remains a barrier to achieving the full impact of the state ADU law that many of us in the housing advocacy community seek."

Thursday, May 21, 2026 in CommonWealth Beacon

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

6 hours ago - Zachary Whalen

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

A cluster of wind turbines beneath a stormy sky, above a forest where the leaves are beginning to change colors.

5 New England states march closer to 800 megawatt wind energy project

Securing federal approval for the project may be complicated under the Trump administration, which has historically been hostile towards domestic wind power.

2 hours ago - Inside Climate News

People boarding a bus on Maryland's Orange Route.

Baltimore to break ground on $50 million Transit Priority Project

The project will bring faster bus trips, safer streets and better bike connections to Baltimore.

3 hours ago - Mass Transit

A brick building with a circular sign with the Airbnb logo hanging off of it.

Airbnb launches $250 million 'last-dollar financing' housing accelerator, makes first investment in Austin

The company will put $6.4 million towards affordable housing development in Texas’ capital.

4 hours ago - Smart Cities Dive

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.