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What Are You Allowed to Build at 321 Genoa St, Monrovia, CA, 91016?

Backyard Cottage

(Detached ADU)

Might be Allowed
This property may qualify for a Detached ADU of up to 1,000 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

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 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 up to 35,002 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 23,102 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 321 Genoa St, Monrovia, CA, 91016

Zoning Jurisdiction

MONROVIA

Parcel ID

8507005108

Property Type

Single Family

Zone

RH

Year Built

1991

Lot Size

46,669 sq ft

Gross Building Area

22,612 sq ft

Gross Floor Area

11,900 sq ft

Estimated

Living Area

1,188 sq ft

Basement Area

0 sq ft

Impervious Surface

22,612 sq ft

Estimated
48.5%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 321 Genoa St, Monrovia, CA, 91016?

Backyard Cottage

(Detached ADU)

Might be Allowed
This property may qualify for a Detached ADU of up to 1,000 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

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 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 up to 35,002 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 23,102 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 321 Genoa St, Monrovia, CA, 91016

Zoning Jurisdiction

MONROVIA

Parcel ID

8507005108

Property Type

Single Family

Zone

RH

Year Built

1991

Lot Size

46,669 sq ft

Gross Building Area

22,612 sq ft

Gross Floor Area

11,900 sq ft

Estimated

Living Area

1,188 sq ft

Basement Area

0 sq ft

Impervious Surface

22,612 sq ft

Estimated
48.5%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.