3F-4000 Zone in Boston, MA
3F-4000 zoning district rules in Boston, MA. Permitted uses, setbacks, height limits, and lot coverage requirements.
The 3F-4000 zone in Boston, MA is a residential district. This zone requires a 10 ft front setback, 5 ft side setback, and 20 ft rear setback. Maximum building height is 40 feet (3 stories). Maximum lot coverage is 60%.
Setback Requirements
| Setback Type | Requirement |
|---|---|
| Front Setback | 10 feet |
| Side Setback | 5 feet |
| Rear Setback | 20 feet |
Boston Zoning Code. 3F-4000 — 4,000 sqft minimum lot, three-family residential.
Height Limits
- Max Height
- 40 feet
- Max Stories
- 3
Boston Zoning Code. 3F-4000 — 40 ft, 3 stories.
Lot Coverage
- Max Coverage
- 60%
Boston Zoning Code. 3F-4000 — 60% maximum lot coverage.
Parking Requirements
Single-family: 1–2 spaces per single-family dwelling depending on zone. Boston's dense urban neighborhoods often have limited parking. Many older Boston homes predate automobile era — no garage. On-street permit parking available in many neighborhoods. Multi-family: 0.5–1 space per unit in residential zones. Near MBTA stations, parking requirements are reduced. Boston's downtown and dense neighborhoods have very low parking minimums — often 0 for affordable housing projects.
Source: Boston Zoning Code; Massachusetts General Laws Chapter 40A Section 3; Affordable Homes Act (Chapter 150, Acts of 2024). Last verified April 5, 2026. View source