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What Are You Allowed to Build at 21 Alpine St # 2, Boston, MA, 02119?

Backyard Cottage

(Detached ADU)

Probably Not Allowed

This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority

In Home Apartment

(Conversion or Addition)

Probably Allowed

This property meets the requirements for an Internal ADU of up to 1,010 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Probably Allowed

This property likely meets the zoning requirements to build a swimming pool. Based on applicable zoning limits, the estimated buildable area for a pool. Final feasibility may depend on site-specific conditions and local interpretation.

Single Family

Probably Not Allowed

This lot does not meet the zoning requirements to build a Single-Family home. A variance may be requested through your local zoning authority

Multi Family

Home Addition

Probably Allowed

We estimate you can expand this property by up to 2,785 sq ft under current zoning rules. This may allow for a horizontal addition, a vertical addition, or both, depending on design and permitting.

Property facts

Zoning Jurisdiction

BOSTON

Parcel ID

1201449004

Property Type

Residential

Zone

Art50_3F-4000

Year Built

2017

Lot Size

5,163 sq ft

Gross Building Area

1,237 sq ft

Gross Floor Area

1,346 sq ft

Estimated

Living Area

1,346 sq ft

Basement Area

0 sq ft

Impervious Surface

1,237 sq ft

Estimated

24.0%of lot coverage

ADU rules for Boston, MA

Based on public data and AI. Check with a pro. Read More