Boston Site Plan Requirements & Permit Guide (2025)

By Site Plan Creator Team •

Guide to creating site plans for building permits in Boston, including ISD requirements, BPDA review, and historic preservation.

Boston Site Plan Requirements: Complete Guide for Building Permits

Creating a site plan for a building permit in Boston, Massachusetts requires meeting specific requirements set by the Inspectional Services Department (ISD). Boston's development is governed by the Boston Zoning Code (Chapter 665 of the Acts of 1956) and administered by the Boston Planning and Development Agency (BPDA). The city's compact geography, historic character, and neighborhood-based zoning create unique site plan requirements.

What Is a Site Plan and Why Does Boston Require One?

A site plan is a scaled drawing showing your property boundaries, existing structures, proposed construction, setbacks, and site features. ISD requires a site plan for all building permit applications to verify compliance with the Boston Zoning Code and the Massachusetts State Building Code (780 CMR). You can look up your property's zoning through the BPDA's zoning viewer at bostonplans.org.

Required Site Plan Elements for ISD

  • Property boundaries with accurate dimensions and total lot area
  • Setbacks from all property lines per the Zoning Code
  • Existing structures with square footage, height, number of stories, and use
  • Proposed construction clearly distinguished from existing
  • Floor Area Ratio (FAR) calculation
  • Lot coverage (usable open space) calculation
  • Parking spaces per the Zoning Code (where applicable)
  • Flood zone designation if in a Special Flood Hazard Area
  • Shadow study for projects in certain zoning districts or near designated parks
  • North arrow and scale
  • Parcel ID number from the Boston Assessing Department

Boston Zoning and Setback Requirements

Boston's zoning is organized into neighborhood-specific subdistricts with varying setback requirements:

  • 1F-5000 (Single-Family, 5,000 sq ft lot): Front 15-20 feet, side 5 feet minimum, rear 20 feet. Max FAR 0.5. Usable open space min 50%.
  • 2F-5000 (Two-Family): Front 15 feet, side 5 feet, rear 20 feet. Max FAR 0.8.
  • 3F-5000 (Three-Family): Front 15 feet, side 5 feet, rear 20 feet. Max FAR 1.0.
  • MFR (Multi-Family Residential): Front 15 feet, side 10 feet, rear 20 feet. Max FAR 1.0-2.0 depending on subdistrict.
  • Rowhouse/townhouse zones: Front varies by neighborhood context, zero side setback (party wall), rear 15-20 feet.

Boston's zoning is highly contextual and neighborhood-specific. Many neighborhoods (Back Bay, South End, Beacon Hill, North End, Charlestown) have special overlay districts with unique standards. Always verify through the BPDA zoning viewer.

BPDA Development Review

The Boston Planning and Development Agency (BPDA) reviews larger projects:

  • Small Project Review (SPR): Projects between 15-20 units or 20,000-100,000 sq ft undergo a streamlined BPDA review with community input
  • Article 80B Large Project Review: Projects over 50,000 sq ft or with significant impact undergo full BPDA review including public comment, design review, and BPDA Board approval
  • Article 80E (Planned Development Areas): Large-scale developments with master planning
  • Community process: Most projects require community meetings and Impact Advisory Group (IAG) participation

Historic Preservation Requirements

Boston has extensive historic preservation protections:

  • Boston Landmarks Commission (BLC): Reviews projects affecting individually designated landmarks and properties in local historic districts
  • Architectural Conservation Districts: Beacon Hill, Back Bay, Bay Village, Fort Point Channel, and others have design review for exterior changes
  • Certificate of Design Approval: Required for exterior work in architectural conservation districts and on landmarks
  • Massachusetts Historical Commission (MHC): State-level review for projects using state or federal funding or requiring state permits

Climate Resilience and Coastal Flood Requirements

Boston's Climate Ready Boston initiative has added climate-related requirements:

  • Coastal Flood Resilience Overlay District (CFROD): Applies to areas projected to be in the 1% annual chance flood zone by 2070 with 40 inches of sea level rise
  • BPDA Climate Resilience standards: Large projects must address coastal flooding, heat, and stormwater through design
  • FEMA flood zones: Properties in AE and VE zones must meet Massachusetts Building Code flood elevation requirements (lowest floor at or above BFE)
  • Groundwater: The Boston Groundwater Trust monitors groundwater levels; some areas (Back Bay, South End) have foundations dependent on stable groundwater levels

Zoning Relief Process

Projects that don't comply with the Zoning Code need relief from the Zoning Board of Appeal (ZBA):

  • Variance: Relief from specific dimensional requirements (setbacks, height, FAR) based on hardship
  • Conditional use permit: Permission for uses allowed only with conditions in a specific zone
  • ISD refusal letter: Required before ZBA application; ISD identifies specific violations
  • Neighborhood notification: Required abutters notification before ZBA hearing
  • ZBA hearings are held weekly but scheduling may take 4-8 weeks

How to Submit Your Site Plan

Permits Online

Submit through Boston's Permits Online portal at permitsonline.boston.gov for electronic plan review. Upload plans in PDF format, pay fees, and track status.

In-Person Submission

Walk-in service at 1010 Massachusetts Avenue, 4th Floor for ISD permit applications.

Permit Fees and Timeline

  • Plan review fees: Based on project scope per ISD fee schedule
  • Building permit fees: Calculated from construction cost
  • Linkage fees: For large commercial projects (housing and jobs contributions)
  • Timeline: Residential plan review 10-20 business days. BPDA Small Project Review 2-4 months. Large Project Review 6-12+ months. ZBA hearings add 4-8 weeks. Historic review adds 30-60 days.

Creating Your Boston Site Plan with Site Plan Creator

Site Plan Creator makes it easy to generate a professional, permit-ready site plan for your Boston property. Simply enter your address, and the tool automatically loads your property boundaries, building footprints, and aerial imagery. You can then add setback lines, label structures, draw proposed construction, and export a scaled PDF ready for ISD submission.

Frequently Asked Questions

What are the typical residential setbacks in Boston?
Boston's setbacks vary by neighborhood-specific subdistrict. Single-family zones (1F-5000) typically require 15-20 foot front, 5-foot side, and 20-foot rear setbacks with 0.5 FAR. Rowhouse zones have zero side setbacks. Many neighborhoods have special overlays with unique standards. Always verify through the BPDA zoning viewer at bostonplans.org.
When does my project need BPDA review?
Small Project Review applies to projects between 15-20 units or 20,000-100,000 sq ft. Article 80B Large Project Review applies to projects over 50,000 sq ft with significant impact. Most projects require community meetings and Impact Advisory Group participation. SPR takes 2-4 months; Large Project Review takes 6-12+ months.
What if my property is in a historic or conservation district?
Boston has multiple architectural conservation districts (Beacon Hill, Back Bay, Bay Village, Fort Point Channel) requiring a Certificate of Design Approval for exterior work. The Boston Landmarks Commission reviews projects affecting individually designated landmarks. Historic review adds 30-60 days to the timeline. Contact BLC early in your planning process.
What flood and climate resilience requirements apply?
Properties in FEMA flood zones must elevate to BFE per the Massachusetts Building Code. The Coastal Flood Resilience Overlay District (CFROD) addresses projected 2070 flood conditions with 40 inches of sea level rise. Large projects must meet BPDA Climate Resilience standards. Groundwater levels are critical in areas like Back Bay and South End.
How does the ZBA process work?
If ISD determines your project doesn't comply with zoning, you receive a refusal letter and can appeal to the Zoning Board of Appeal. You need to notify abutters, attend a hearing, and demonstrate hardship for variances. ZBA hearings are held weekly but scheduling takes 4-8 weeks. Variances require evidence that the property has unique conditions preventing compliance.
How do I submit plans to ISD?
Submit through Permits Online at permitsonline.boston.gov for electronic plan review. Upload plans in PDF format, pay fees, and track your application online. Walk-in service is at 1010 Massachusetts Avenue, 4th Floor. By-right residential permits take 10-20 business days.
What are linkage fees?
Large commercial developments in Boston pay linkage fees to fund affordable housing and job training programs. Housing linkage is currently assessed on commercial projects over 100,000 sq ft. Jobs linkage also applies to larger commercial projects. These fees are paid to the BPDA over several years.
How long does the Boston permit process take?
By-right residential permits take 10-20 business days through ISD. Projects needing ZBA variances add 4-8 weeks. BPDA Small Project Review takes 2-4 months. Large Project Review takes 6-12+ months including community process. Historic district review adds 30-60 days. Complex projects often require multiple agency reviews.

How to Create a Site Plan in Boston

  1. Look Up Your Property Information: Use the BPDA zoning viewer at bostonplans.org to find your subdistrict, FAR limits, overlay districts, historic district status, and flood zone. Note your parcel ID from the Boston Assessing Department.
  2. Determine Review Path: Based on project size and scope, determine if your project is by-right through ISD, needs ZBA relief, or requires BPDA development review. Check historic district and conservation district requirements.
  3. Create Your Site Plan: Enter your Boston address in Site Plan Creator to load property boundaries, building footprints, and aerial imagery. Add setback lines per your zoning subdistrict and label structures.
  4. Include All Required Elements: Ensure your site plan includes property boundaries, setbacks, FAR calculation, lot coverage, usable open space, parking, flood zone if applicable, and north arrow with scale.
  5. Prepare for Agency Reviews: If in a historic/conservation district, prepare BLC application materials. If needing ZBA relief, prepare the zoning analysis and abutters notification. For large projects, prepare BPDA filing.
  6. Submit Through Permits Online: Upload plans through Permits Online at permitsonline.boston.gov. Pay fees and track your application. File concurrent agency applications (ZBA, BLC, BPDA) as needed.
  7. Manage Review and Obtain Permit: Track your application through the portal. Respond to ISD reviewer comments. Attend ZBA hearings or BPDA community meetings as required. Once all approvals are obtained, receive your building permit.