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What Are You Allowed to Build at 420 S Madison Ave Apt 310, Pasadena, CA, 91101?
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 Allowed
This property likely meets the zoning requirements to build a Single-Family home.
Multifamily
Home Addition
The property may meet the zoning requirements to build a Home Addition of zoning-counted floor area. Additional factors may affect feasibility.
Property facts
Zoning Jurisdiction
PASADENA
Parcel ID
5734018059
Property Type
Single Family
Zone
CD-RM-32
Year Built
1970
Lot Size
50,171 sq ft
Gross Building Area
27,998 sq ft
Gross Floor Area
14,500 sq ft
Living Area
1,002 sq ft
Basement Area
0 sq ft
Impervious Surface
27,998 sq ft
55.8%of lot coverage

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 420 S Madison Ave Apt 310, Pasadena, CA, 91101?
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 Allowed
This property likely meets the zoning requirements to build a Single-Family home.
Multifamily
Home Addition
The property may meet the zoning requirements to build a Home Addition of zoning-counted floor area. Additional factors may affect feasibility.
Property facts
Zoning Jurisdiction
PASADENA
Parcel ID
5734018059
Property Type
Single Family
Zone
CD-RM-32
Year Built
1970
Lot Size
50,171 sq ft
Gross Building Area
27,998 sq ft
Gross Floor Area
14,500 sq ft
Living Area
1,002 sq ft
Basement Area
0 sq ft
Impervious Surface
27,998 sq ft
55.8%of lot coverage

Based on public data and AI. Check with a pro. Read More
© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.