1. Know What Requires a Permit

In Boston, most structural, electrical, and plumbing work requires a permit, even if it's inside the home. This includes:

-Home additions or major renovations

-Removing or relocating walls

-Window or door changes

-Decks, porches, and fences

-New driveways or retaining walls

-Kitchen or bath remodels involving plumbing/electrical

-HVAC upgrades

Cosmetic changes like painting, flooring, or replacing cabinets may not require permits—but when in doubt, check with the Boston Inspectional Services Department (ISD).

2. Understand Boston’s Zoning Rules

Before you can get a building permit, your project must comply with local zoning codes. Boston has strict zoning laws depending on the neighborhood, property size, and use. If your design doesn’t meet these requirements (e.g., setback distances or height limits), you may need to file for a zoning variance, which can take extra time and require a public hearing.

Pro Tip: Work with a contractor or architect who’s familiar with your neighborhood’s zoning overlay.

3. Apply Through the BOS:311 Portal

Boston’s permitting system is digital, which means most permit applications are filed through the BOS:311 or HUB Permitting Portal. You’ll need:

-A full set of plans (architectural, structural, etc.)

-Contractor license and insurance info

-Estimated cost of the work

-Plot plans or site plans for additions

Turnaround times can vary. A simple interior permit might be approved in a few days. Larger projects could take weeks or more.

4. Historic District? Special Rules Apply

If your home is located in a Boston historic district (such as Beacon Hill or the South End), your project may need Historic Commission approval before permits are issued. That means more documentation, specific materials, and often additional review boards.

Don’t start work until this is cleared—it can be a costly mistake.

5. Always Schedule Inspections

Once your permit is approved and work begins, don’t forget to schedule the required inspections. Depending on the project, you may need several inspections at different phases—such as framing, electrical, plumbing, and a final sign-off. Skipping inspections can delay your project or prevent you from receiving a certificate of occupancy.

6. Work with the Right Contractor

Hiring a contractor who understands Boston’s permitting process can save you serious time and frustration. A qualified local contractor will help manage filings, anticipate zoning issues, and communicate with city departments throughout the build.