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What Are You Allowed to Build at 340 Calvert Ave, Webster Groves, MO, 63119?

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

Might be Allowed
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 Allowed
This property likely meets the zoning requirements to build a Single-Family home up to 3,200 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multifamily

Home Addition

Probably Allowed
We estimate you can expand this property by up to 2,140 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

Streetview picture of 340 Calvert Ave, Webster Groves, MO, 63119

Zoning Jurisdiction

WEBSTER GROVES

Parcel ID

23K330212

Property Type

Single Family

Zone

A4

Year Built

1941

Lot Size

10,331 sq ft

Gross Building Area

1,106 sq ft

Gross Floor Area

1,060 sq ft

Estimated

Living Area

1,015 sq ft

Basement Area

0 sq ft

Impervious Surface

1,106 sq ft

Estimated
10.7%of lot coverage

ADU rules for Webster Groves, MO

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 340 Calvert Ave, Webster Groves, MO, 63119?

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

Might be Allowed
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 Allowed
This property likely meets the zoning requirements to build a Single-Family home up to 3,200 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multifamily

Home Addition

Probably Allowed
We estimate you can expand this property by up to 2,140 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

Streetview picture of 340 Calvert Ave, Webster Groves, MO, 63119

Zoning Jurisdiction

WEBSTER GROVES

Parcel ID

23K330212

Property Type

Single Family

Zone

A4

Year Built

1941

Lot Size

10,331 sq ft

Gross Building Area

1,106 sq ft

Gross Floor Area

1,060 sq ft

Estimated

Living Area

1,015 sq ft

Basement Area

0 sq ft

Impervious Surface

1,106 sq ft

Estimated
10.7%of lot coverage

ADU rules for Webster Groves, MO

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

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