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What Are You Allowed to Build at 1820 8th Ave, Monrovia, CA, 91016?

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.

Multifamily

Home Addition

Probably Allowed
We estimate you can expand this property by up to 1,290 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 1820 8th Ave, Monrovia, CA, 91016

Zoning Jurisdiction

MONROVIA

Parcel ID

5780018051

Property Type

Single Family

Zone

RM4000

Year Built

1990

Lot Size

7,303 sq ft

Gross Building Area

1,320 sq ft

Gross Floor Area

1,632 sq ft

Estimated

Living Area

1,632 sq ft

Basement Area

0 sq ft

Impervious Surface

1,320 sq ft

Estimated
18.1%of lot coverage

ADU rules for Monrovia, 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 1820 8th Ave, Monrovia, CA, 91016?

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.

Multifamily

Home Addition

Probably Allowed
We estimate you can expand this property by up to 1,290 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 1820 8th Ave, Monrovia, CA, 91016

Zoning Jurisdiction

MONROVIA

Parcel ID

5780018051

Property Type

Single Family

Zone

RM4000

Year Built

1990

Lot Size

7,303 sq ft

Gross Building Area

1,320 sq ft

Gross Floor Area

1,632 sq ft

Estimated

Living Area

1,632 sq ft

Basement Area

0 sq ft

Impervious Surface

1,320 sq ft

Estimated
18.1%of lot coverage

ADU rules for Monrovia, CA

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

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