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What Are You Allowed to Build at 28700 Mission Blvd, Hayward, CA, 94544?

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
This lot does not meet the zoning requirements to build a Single-Family home. A variance may be requested through your local zoning authority

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 28700 Mission Blvd, Hayward, CA, 94544

Zoning Jurisdiction

HAYWARD

Parcel ID

78C4614

Property Type

Residential

Zone

MB-CC

Year Built

1973

Lot Size

39,004 sq ft

Gross Building Area

6,960 sq ft

Gross Floor Area

11,914 sq ft

Estimated

Living Area

11,914 sq ft

Basement Area

0 sq ft

Impervious Surface

11,914 sq ft

Estimated
30.5%of lot coverage

ADU rules for Hayward, 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 28700 Mission Blvd, Hayward, CA, 94544?

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
This lot does not meet the zoning requirements to build a Single-Family home. A variance may be requested through your local zoning authority

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 28700 Mission Blvd, Hayward, CA, 94544

Zoning Jurisdiction

HAYWARD

Parcel ID

78C4614

Property Type

Residential

Zone

MB-CC

Year Built

1973

Lot Size

39,004 sq ft

Gross Building Area

6,960 sq ft

Gross Floor Area

11,914 sq ft

Estimated

Living Area

11,914 sq ft

Basement Area

0 sq ft

Impervious Surface

11,914 sq ft

Estimated
30.5%of lot coverage

ADU rules for Hayward, CA

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

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