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What Are You Allowed to Build at 686 Earlham St Rear, Pasadena, CA, 91101?

Backyard Cottage

(Detached ADU)

Probably Allowed
This property meets the requirements for a Detached ADU of up to 890 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 up to 2,199 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multi Family

Home Addition

Probably Allowed
We estimate you can expand this property by up to 890 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 686 Earlham St Rear, Pasadena, CA, 91101

Zoning Jurisdiction

PASADENA

Parcel ID

5731015032

Property Type

Three Family

Zone

RM-12

Year Built

1961

Lot Size

4,855 sq ft

Gross Building Area

1,663 sq ft

Gross Floor Area

2,309 sq ft

Estimated

Living Area

2,309 sq ft

Basement Area

0 sq ft

Impervious Surface

2,309 sq ft

Estimated
47.6%of lot coverage

ADU rules for Pasadena, 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 686 Earlham St Rear, Pasadena, CA, 91101?

Backyard Cottage

(Detached ADU)

Probably Allowed
This property meets the requirements for a Detached ADU of up to 890 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 up to 2,199 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multi Family

Home Addition

Probably Allowed
We estimate you can expand this property by up to 890 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 686 Earlham St Rear, Pasadena, CA, 91101

Zoning Jurisdiction

PASADENA

Parcel ID

5731015032

Property Type

Three Family

Zone

RM-12

Year Built

1961

Lot Size

4,855 sq ft

Gross Building Area

1,663 sq ft

Gross Floor Area

2,309 sq ft

Estimated

Living Area

2,309 sq ft

Basement Area

0 sq ft

Impervious Surface

2,309 sq ft

Estimated
47.6%of lot coverage

ADU rules for Pasadena, CA

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

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