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What Are You Allowed to Build at 475 El Centro Rd, Hillsborough, CA, 94010?

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 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 4,426 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 under current zoning rules. We weren't able to identify a specific size limit, but an addition may be possible horizontally, vertically, or both, depending on design and permitting.

Property facts

Streetview picture of 475 El Centro Rd, Hillsborough, CA, 94010

Zoning Jurisdiction

HILLSBOROUGH

Parcel ID

031022030

Property Type

Two Family

Zone

RD-1

Year Built

1927

Lot Size

17,702 sq ft

Gross Building Area

3,220 sq ft

Gross Floor Area

3,810 sq ft

Estimated

Living Area

3,810 sq ft

Basement Area

0 sq ft

Impervious Surface

3,220 sq ft

Estimated
18.2%of lot coverage

ADU rules for Hillsborough, 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 475 El Centro Rd, Hillsborough, CA, 94010?

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 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 4,426 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 under current zoning rules. We weren't able to identify a specific size limit, but an addition may be possible horizontally, vertically, or both, depending on design and permitting.

Property facts

Streetview picture of 475 El Centro Rd, Hillsborough, CA, 94010

Zoning Jurisdiction

HILLSBOROUGH

Parcel ID

031022030

Property Type

Two Family

Zone

RD-1

Year Built

1927

Lot Size

17,702 sq ft

Gross Building Area

3,220 sq ft

Gross Floor Area

3,810 sq ft

Estimated

Living Area

3,810 sq ft

Basement Area

0 sq ft

Impervious Surface

3,220 sq ft

Estimated
18.2%of lot coverage

ADU rules for Hillsborough, CA

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

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