Want to explore more about your property?
What Are You Allowed to Build at 75 William St, Greenwich, CT, 06830?
Backyard Cottage
(Detached ADU)
This property may qualify for a Detached ADU of up to 800 sq ft allowed By Special Permit, but there are some special considerations.
In Home Apartment
(Conversion or Addition)
This property may qualify for an Internal ADU of up to 1,177 sq ft allowed By Special Permit, but there are some special considerations.
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
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.
Multifamily
Home Addition
Probably Allowed
We estimate you can expand this property by up to 2,763 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
GREENWICH
Parcel ID
071780S
Property Type
Single Family
Zone
R-6
Year Built
2013
Lot Size
11,761 sq ft
Gross Building Area
3,364 sq ft
Gross Floor Area
3,706 sq ft
Living Area
3,706 sq ft
Basement Area
0 sq ft
Impervious Surface
3,364 sq ft
28.6%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 75 William St, Greenwich, CT, 06830?
Backyard Cottage
(Detached ADU)
This property may qualify for a Detached ADU of up to 800 sq ft allowed By Special Permit, but there are some special considerations.
In Home Apartment
(Conversion or Addition)
This property may qualify for an Internal ADU of up to 1,177 sq ft allowed By Special Permit, but there are some special considerations.
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
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.
Multifamily
Home Addition
Probably Allowed
We estimate you can expand this property by up to 2,763 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
GREENWICH
Parcel ID
071780S
Property Type
Single Family
Zone
R-6
Year Built
2013
Lot Size
11,761 sq ft
Gross Building Area
3,364 sq ft
Gross Floor Area
3,706 sq ft
Living Area
3,706 sq ft
Basement Area
0 sq ft
Impervious Surface
3,364 sq ft
28.6%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.