Your go-to guide for common projects in Boston, Brookline, Cambridge, Somerville, and Medford
Thinking about making a few changes to your home or small business? Whether it’s putting up a wall, adding a new sink, or even replacing a window, one question comes up every time:
“Do I need a permit for that?”
At Permitti, we help clients navigate this exact question every day. Here’s a friendly guide to what usually does—and doesn’t—require a permit in the greater Boston area. (Keep in mind: rules vary slightly between towns, but this will give you a strong starting point.)
Projects That Usually Require a Building Permit
Structural Work
- Removing or adding interior walls
- Creating new doorways or window openings
- Converting attics or basements into living space
➡️ Any changes to the structure of your home or building typically require a permit and professional drawings.
Plumbing and Electrical Changes
- Moving or adding plumbing fixtures (sinks, toilets, showers)
- Installing new gas appliances or rerouting lines
- Running new electrical circuits or panels
➡️ Most cities require licensed professionals to pull these permits—even for small changes.
Kitchen and Bathroom Renovations
- Gutting or reconfiguring a kitchen or bath
- Installing new cabinets that affect layout
- Changing appliance locations or utilities
➡️ Even if it looks like a cosmetic change, permit reviewers want to ensure safety and code compliance.
Commercial Renovations
- Changing the layout of a restaurant, retail store, or office
- Installing signage or awnings
- Changing the building’s use (e.g., from retail to food service)
➡️ Commercial spaces often require zoning approval in addition to a building permit—especially in Brookline and Cambridge.
Projects That Might Require a Permit
Window Replacement
- Same-size, same-material windows? Often okay.
- Changing size, material, or type? Permit likely.
Deck Repairs or Additions
- Minor repairs? Usually okay.
- Rebuilding or changing dimensions? Permit needed.
Interior Finishes
- Painting, refinishing floors, or tile work = no permit.
- Changing layout, structure, or finishes in commercial kitchens = yes.
Projects That Usually Don’t Require a Permit
- Painting walls
- Installing kitchen appliances in existing locations
- Replacing flooring, countertops, or light fixtures (no electrical work)
- Small repairs that don’t affect structure or utilities
➡️ When in doubt, it’s best to check—especially for multifamily or commercial buildings.
Permit Rules Vary by City
Here’s what to keep in mind for different municipalities:
- Boston: Permits required for most structural, plumbing, or electrical work.
- Brookline: Historic areas may trigger design review, even for exterior repairs.
- Cambridge: Often requires zoning sign-off before issuing building permits.
- Somerville & Medford: May allow homeowner permits for small jobs—but only if you’re not hiring a contractor.
Why Permits Matter
Pulling a permit protects you from:
- Fines or stop-work orders
- Problems with insurance claims
- Delays when selling or refinancing property
Skipping a permit might seem like a shortcut—but it often leads to bigger headaches later.
Not Sure If You Need a Permit?
Just get in touch with Permitti. We’ll review your project and let you know what’s required. No pressure—just advice for small renovations done right. Start here
Disclaimer: This blog is for general informational purposes only and is not intended as legal, code, or permitting advice. Every project is unique, and permitting requirements can vary depending on location, scope, and agency review. You should always consult with the appropriate professionals or municipal departments for your specific project requirements.