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What Are You Allowed to Build at 20425 La Puente Rd, Walnut, CA, 91789?

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

Might be Allowed
This property may meet the zoning requirements to build a Single-Family home up to 48,369 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit. Additional factors may affect feasibility.

Multifamily

Home Addition

Might be Allowed
The property may meet the zoning requirements to build a Home Addition up to 34,052 sq ft of zoning-counted floor area. Additional factors may affect feasibility.

Property facts

Streetview picture of 20425 La Puente Rd, Walnut, CA, 91789

Zoning Jurisdiction

WALNUT

Parcel ID

8709031014

Property Type

Institutional - Churches

Zone

R-1

Year Built

1972

Lot Size

120,922 sq ft

Gross Building Area

12,104 sq ft

Gross Floor Area

14,317 sq ft

Estimated

Living Area

14,317 sq ft

Basement Area

0 sq ft

Impervious Surface

14,317 sq ft

Estimated
11.8%of lot coverage

ADU rules for Walnut, CA

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 20425 La Puente Rd, Walnut, CA, 91789?

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

Might be Allowed
This property may meet the zoning requirements to build a Single-Family home up to 48,369 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit. Additional factors may affect feasibility.

Multifamily

Home Addition

Might be Allowed
The property may meet the zoning requirements to build a Home Addition up to 34,052 sq ft of zoning-counted floor area. Additional factors may affect feasibility.

Property facts

Streetview picture of 20425 La Puente Rd, Walnut, CA, 91789

Zoning Jurisdiction

WALNUT

Parcel ID

8709031014

Property Type

Institutional - Churches

Zone

R-1

Year Built

1972

Lot Size

120,922 sq ft

Gross Building Area

12,104 sq ft

Gross Floor Area

14,317 sq ft

Estimated

Living Area

14,317 sq ft

Basement Area

0 sq ft

Impervious Surface

14,317 sq ft

Estimated
11.8%of lot coverage

ADU rules for Walnut, CA

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

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