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What Are You Allowed to Build at 221 Crystal Lake Rd, Groton, CT, 06340?

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 Not Allowed
This lot does not meet the requirements for an Internal ADU. A variance may be requested through your local zoning authority

Swimming Pool

Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. 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.

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 221 Crystal Lake Rd, Groton, CT, 06340

Zoning Jurisdiction

GROTON

Parcel ID

178014424671

Property Type

Multi Family

Zone

RU-20

Year Built

1929

Lot Size

36,154 sq ft

Gross Building Area

1,190 sq ft

Gross Floor Area

809 sq ft

Estimated

Living Area

428 sq ft

Basement Area

0 sq ft

Impervious Surface

1,190 sq ft

Estimated
3.3%of lot coverage

ADU rules for Groton, CT

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 221 Crystal Lake Rd, Groton, CT, 06340?

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 Not Allowed
This lot does not meet the requirements for an Internal ADU. A variance may be requested through your local zoning authority

Swimming Pool

Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. 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.

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 221 Crystal Lake Rd, Groton, CT, 06340

Zoning Jurisdiction

GROTON

Parcel ID

178014424671

Property Type

Multi Family

Zone

RU-20

Year Built

1929

Lot Size

36,154 sq ft

Gross Building Area

1,190 sq ft

Gross Floor Area

809 sq ft

Estimated

Living Area

428 sq ft

Basement Area

0 sq ft

Impervious Surface

1,190 sq ft

Estimated
3.3%of lot coverage

ADU rules for Groton, CT

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

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