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What Are You Allowed to Build at 39 Gardner St Unit 2, Waltham, MA, 02453?

Backyard Cottage

(Detached ADU)

Might be Allowed
This property may qualify for a Detached ADU of up to 767 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

In Home Apartment

(Conversion or Addition)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 767 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 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

Streetview picture of 39 Gardner St Unit 2, Waltham, MA, 02453

Zoning Jurisdiction

WALTHAM

Parcel ID

R0690210005002

Property Type

Residential

Zone

RB

Year Built

1900

Lot Size

6,425 sq ft

Gross Building Area

1,914 sq ft

Gross Floor Area

1,534 sq ft

Estimated

Living Area

1,155 sq ft

Basement Area

0 sq ft

Impervious Surface

1,914 sq ft

Estimated
29.8%of lot coverage

ADU rules for Waltham, 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 39 Gardner St Unit 2, Waltham, MA, 02453?

Backyard Cottage

(Detached ADU)

Might be Allowed
This property may qualify for a Detached ADU of up to 767 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

In Home Apartment

(Conversion or Addition)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 767 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 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

Streetview picture of 39 Gardner St Unit 2, Waltham, MA, 02453

Zoning Jurisdiction

WALTHAM

Parcel ID

R0690210005002

Property Type

Residential

Zone

RB

Year Built

1900

Lot Size

6,425 sq ft

Gross Building Area

1,914 sq ft

Gross Floor Area

1,534 sq ft

Estimated

Living Area

1,155 sq ft

Basement Area

0 sq ft

Impervious Surface

1,914 sq ft

Estimated
29.8%of lot coverage

ADU rules for Waltham, MA

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

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