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What Are You Allowed to Build at 17 Webster Rd, Lexington, MA, 02421?
Backyard Cottage
(Detached ADU)
Probably Allowed
This property meets the requirements for a Detached ADU of up to 1,000 sq ft allowed By Right, or possibly more by Special Permit.
In Home Apartment
(Conversion or Addition)
Probably Allowed
This property meets the requirements for an Internal ADU of up to 1,000 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
The existing home is allowed as a legally nonconforming structure. However, the lot does not meet current zoning requirements for new Single-Family construction. A variance or other zoning relief may be requested.
Multi Family
Home Addition
Probably Allowed
We estimate you can expand this property by up to 5,408 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
LEXINGTON
Parcel ID
949
Property Type
Single Family
Zone
RO
Year Built
1930
Lot Size
12,349 sq ft
Gross Building Area
1,328 sq ft
Gross Floor Area
1,261 sq ft
Living Area
1,194 sq ft
Basement Area
0 sq ft
Impervious Surface
1,328 sq ft
10.8%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 17 Webster Rd, Lexington, MA, 02421?
Backyard Cottage
(Detached ADU)
Probably Allowed
This property meets the requirements for a Detached ADU of up to 1,000 sq ft allowed By Right, or possibly more by Special Permit.
In Home Apartment
(Conversion or Addition)
Probably Allowed
This property meets the requirements for an Internal ADU of up to 1,000 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
The existing home is allowed as a legally nonconforming structure. However, the lot does not meet current zoning requirements for new Single-Family construction. A variance or other zoning relief may be requested.
Multi Family
Home Addition
Probably Allowed
We estimate you can expand this property by up to 5,408 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
LEXINGTON
Parcel ID
949
Property Type
Single Family
Zone
RO
Year Built
1930
Lot Size
12,349 sq ft
Gross Building Area
1,328 sq ft
Gross Floor Area
1,261 sq ft
Living Area
1,194 sq ft
Basement Area
0 sq ft
Impervious Surface
1,328 sq ft
10.8%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.