The Massachusetts Development Field Guide
Plain-language explanations of zoning, permitting, and the laws shaping development in Massachusetts, kept up to date as the rules change.
Recent updates
Question 7 (2026): Single-Family Homes on Smaller Lots
What the November 3, 2026 ballot question would change for single-family homes on lots of 5,000 square feet or more, and what it would mean for property owners and project teams.
Read entry →Site Plan Review Reform: What the Proposed Changes Would Do
State legislation filed in 2026 would, for the first time, define site plan review in the Zoning Act and set deadlines and limits on conditions. Here's what's proposed and why it matters.
Read entry →Zoning basics
By Right, Special Permit, or Variance? How Massachusetts Zoning Approvals Work
Almost every project in Massachusetts falls into one of three zoning paths. Knowing which one applies to yours shapes your timeline, your risk, and your design.
Read entry →Nonconforming Lots and Structures (Chapter 40A, Section 6)
Many older Massachusetts homes and lots don't meet today's zoning. Section 6 protects them, and it often opens more options than owners expect.
Read entry →Permits & approvals
Special Permits in Massachusetts
What a special permit is, who grants it, how the hearing works, and how to put your project in the best position for approval.
Read entry →Variances in Massachusetts: The Three-Part Test
Variances are among the hardest zoning approvals to get in Massachusetts. Here's the legal test, why it's so demanding, and what to consider before applying.
Read entry →Approval Not Required (ANR) Plans
How Massachusetts property owners can divide land without full subdivision review, what the planning board actually decides, and what an ANR endorsement does not mean.
Read entry →Site Plan Review in Massachusetts
What local site plan review covers, how it differs from a special permit, and how to keep it from becoming the longest step in your project.
Read entry →Abutter Notice and Zoning Appeals
Who gets notified about a Massachusetts zoning hearing, how appeals work, and why the appeal period matters before you start construction.
Read entry →Wetlands and Conservation Commission Review
When work near wetlands, streams, or rivers needs Conservation Commission approval in Massachusetts, and how it can shape a project long before zoning does.
Read entry →State laws
Accessory Dwelling Units (ADUs) in Massachusetts
Since February 2025, Massachusetts law protects one ADU per lot in single-family zoning districts. Here's what's allowed, what communities can still regulate, and what to check first.
Read entry →Chapter 40B Comprehensive Permits
How Massachusetts' affordable housing law lets qualifying developments get all local approvals through one Zoning Board of Appeals permit, and why a community's affordable housing inventory matters.
Read entry →MBTA Communities Zoning (Section 3A)
The state law requiring communities served by the MBTA to zone for multifamily housing by right, and what it means for property owners in and near those districts.
Read entry →Planning & development
Community Outreach for Development Projects: A Practical Guide for Massachusetts Project Teams
Why early, clear communication with neighbors helps projects move through permitting, and five practical ways to do it well.
Read entry →What Is Mixed-Use Development?
Where mixed-use development came from, why American zoning moved away from it, and why it's returning, including in Massachusetts zoning today.
Read entry →A Brief History of Walkability and Its Role in Urban Planning
Why some places feel made for walking and others feel hostile to it, from pre-modern cities through urban renewal to today's renewed interest in walkable neighborhoods.
Read entry →Have a question the Field Guide doesn't answer?
Have a question about zoning, permitting, or a property you're considering? Ask a Planner is a free way to get an answer from someone who works with Massachusetts bylaws every day.
Send us your question, whether it's about a specific lot or how a process works in general, and a planner will reply by email, usually within 2–3 business days. With identifying details removed, some of the most useful questions become new Field Guide entries.
Answers are general guidance, not a legal opinion or a formal zoning determination.