Structure Height Limits: Boston vs Chelsea
How do structure height limits rules compare between Boston, MA and Chelsea, MA?
Chelsea has fewer restrictions than Boston.
Boston, MA
Suffolk County
Boston's Zoning Code establishes maximum building heights by zoning district, ranging from 35 feet in low-density residential areas to no height limit in parts of the Financial District. The BPDA reviews large projects and the ZBA handles height variances. FAA height restrictions also apply near Logan Airport.
View full Boston rules →Chelsea, MA
Suffolk County
Building heights in Suffolk County are set by Boston's article-specific zoning, with downtown heights up to 1,000 feet (Hancock Tower area) but residential neighborhoods capped at 35-50 feet. FAA Logan approach cones further constrain East Boston and Winthrop.
View full Chelsea rules →Key Facts Comparison
| Fact | Boston | Chelsea |
|---|---|---|
| Residential Low | 35 feet maximum | - |
| Multi-Family | 45-65 feet typical | - |
| Downtown | 400+ feet in some zones | - |
| FAA Review | Required for 200+ foot structures | - |
| Shadow Protection | Near Boston Common/Public Garden | - |
| Boston Residential | - | 35 ft / 2.5 stories typical |
| Boston Downtown | - | Up to 1,000 ft |
| Shadow Law | - | Protects Common, Public Garden |
| FAA Part 77 | - | Logan approach constraints |
| Measured From | - | Average finished grade |
Highlighted rows indicate differences between cities.
Boston FAQ
How tall can I build in Boston?
Height limits vary by zoning district: 35 feet in low-density residential, 45-65 feet in multi-family zones, and 400+ feet in parts of downtown. Check your zoning subdistrict in the Boston Zoning Code for your specific limit.
Does Boston have shadow restrictions?
Yes. Boston protects certain parks and public spaces, particularly Boston Common and the Public Garden, from new shadows cast by development. This effectively limits building heights near these spaces regardless of zoning height limits.
Chelsea FAQ
Why is Boston's skyline shorter on the Common side?
The 1990 Boston Shadow Law (Chapter 362 of the Acts of 1990) restricts new construction that would cast additional shadow on Boston Common, the Public Garden, or Commonwealth Avenue Mall. This has shaped downtown development and required shadow-impact modeling for major projects.
Can I build a tall house in East Boston?
FAA Part 77 Logan approach surfaces may limit you. Any height exceeding FAA-surface criteria requires 7460-1 Notice to the FAA, and the FAA may issue a Determination of Hazard that effectively prohibits the project. Consult with a Part 77 specialist before design.
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