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What Are You Allowed to Build at 49 Lexington St # 51, Watertown, MA, 02472?

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

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

Multifamily

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

Streetview picture of 49 Lexington St # 51, Watertown, MA, 02472

Zoning Jurisdiction

WATERTOWN

Parcel ID

3582A0

Property Type

Residential

Zone

WSQ1

Year Built

1920

Lot Size

5,758 sq ft

Gross Building Area

1,903 sq ft

Gross Floor Area

1,903 sq ft

Estimated

Living Area

1,903 sq ft

Basement Area

0 sq ft

Impervious Surface

1,903 sq ft

Estimated
33.0%of lot coverage

ADU rules for Watertown, MA

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

© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.

What Are You Allowed to Build at 49 Lexington St # 51, Watertown, MA, 02472?

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

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

Multifamily

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

Streetview picture of 49 Lexington St # 51, Watertown, MA, 02472

Zoning Jurisdiction

WATERTOWN

Parcel ID

3582A0

Property Type

Residential

Zone

WSQ1

Year Built

1920

Lot Size

5,758 sq ft

Gross Building Area

1,903 sq ft

Gross Floor Area

1,903 sq ft

Estimated

Living Area

1,903 sq ft

Basement Area

0 sq ft

Impervious Surface

1,903 sq ft

Estimated
33.0%of lot coverage

ADU rules for Watertown, MA

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

© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.