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What Are You Allowed to Build at 21 Walker St, Cambridge, MA, 02138?

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 900 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Might be Allowed

This property may meet the zoning requirements to build a swimming pool. Some factors may affect feasibility. 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 Allowed

This property likely meets the zoning requirements to build a Single-Family home.

Multi Family

Home Addition

Probably Allowed

We estimate you can expand this property under current zoning rules. We weren't able to identify a specific size limit, but an addition may be possible horizontally, vertically, or both, depending on design and permitting.

Property facts

Zoning Jurisdiction

CAMBRIDGE

Parcel ID

21424

Property Type

Single Family

Zone

Res C-1

Year Built

1894

Lot Size

2,613 sq ft

Gross Building Area

990 sq ft

Gross Floor Area

2,414 sq ft

Estimated

Living Area

2,414 sq ft

Basement Area

0 sq ft

Impervious Surface

990 sq ft

Estimated

37.9%of lot coverage

ADU rules for Cambridge, MA

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