Massachusetts has recently enacted legislation that simplifies the process for homeowners to add Accessory Dwelling Units (ADUs) to their properties. While the state law provides a general framework, individual cities and towns may have specific regulations regarding ADUs. It’s essential to consult local ordinances to ensure compliance.​

Below is a list of cities in Massachussetts along with links to their respective ADU regulations:

ActonActon Zoning Bylaw

AmherstAmherst ADU Information

AndoverAndover ADU Ordinance

ArlingtonArlington ADU Bylaw

AshlandAshland ADU Regulations

AttleboroAttleboro ADU Ordinance

BarnstableBarnstable ADU Information

BelmontBelmont ADU Guidelines

BeverlyBeverly ADU Ordinance

BostonBoston ADU Program

BraintreeBraintree ADU Ordinance

BrocktonBrockton ADU Ordinance

BrooklineBrookline ADU Guide

CambridgeCambridge ADU Information

ChelmsfordChelmsford ADU Bylaw

ChelseaChelsea ADU Guidelines

ChicopeeChicopee ADU Ordinance

ConcordConcord ADU Information

DanversDanvers Zoning Bylaw

DedhamDedham ADU Bylaw

EverettEverett ADU Ordinance

FalmouthFalmouth ADU Bylaw

FitchburgFitchburg ADU Ordinance

FraminghamFramingham ADU Information

GloucesterGloucester ADU Ordinance

HaverhillHaverhill ADU Information

LawrenceLawrence ADU Ordinance

LeominsterLeominster ADU Ordinance

LexingtonLexington ADU Bylaw

LowellLowell ADU Ordinance

LynnLynn ADU Guide

MaldenMalden ADU Regulations

MarlboroughMarlborough ADU Ordinance

MedfordMedford ADU Information

MethuenMethuen ADU Information

NatickNatick ADU Ordinance

NeedhamNeedham ADU Ordinance

New BedfordNew Bedford ADU Ordinance

NewtonNewton ADU Information

PeabodyPeabody Zoning Code

Plymouth: [Plymouth ADU Information