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What Are You Allowed to Build at 21 Wilton St, Boston, MA, 02136?
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 1,103 sq ft allowed By Right, or possibly more by Special Permit.
Swimming Pool
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
This property may meet the zoning requirements to build a Single-Family home up to 2,622 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit. Additional factors may affect feasibility.
Multi Family
Home Addition
The property may meet the zoning requirements to build a Home Addition up to 1,152 sq ft of zoning-counted floor area. Additional factors may affect feasibility.
Property facts
Zoning Jurisdiction
BOSTON
Parcel ID
1809376010
Property Type
Single Family
Zone
Art69_2F-5000
Year Built
1999
Lot Size
5,244 sq ft
Gross Building Area
936 sq ft
Gross Floor Area
1,470 sq ft
Living Area
1,470 sq ft
Basement Area
0 sq ft
Impervious Surface
936 sq ft
17.8%of lot coverage

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 21 Wilton St, Boston, MA, 02136?
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 1,103 sq ft allowed By Right, or possibly more by Special Permit.
Swimming Pool
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
This property may meet the zoning requirements to build a Single-Family home up to 2,622 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit. Additional factors may affect feasibility.
Multi Family
Home Addition
The property may meet the zoning requirements to build a Home Addition up to 1,152 sq ft of zoning-counted floor area. Additional factors may affect feasibility.
Property facts
Zoning Jurisdiction
BOSTON
Parcel ID
1809376010
Property Type
Single Family
Zone
Art69_2F-5000
Year Built
1999
Lot Size
5,244 sq ft
Gross Building Area
936 sq ft
Gross Floor Area
1,470 sq ft
Living Area
1,470 sq ft
Basement Area
0 sq ft
Impervious Surface
936 sq ft
17.8%of lot coverage

Based on public data and AI. Check with a pro. Read More
© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.