21406 Oak St, Hayward (Castro Valley), CA 94546 Property Records

Alameda County property record for 21406 Oak St, Hayward, CA 94546

Property Summary

Property Type	Recreational Vacant Land
Lot Size	0.167 acres (7,268 sqft)
Owner	Company Name on File
Tax Bill	$1,658 (2025)
Flood Zone	Zone X (minimal risk)
APN	`415-160-14`

Property Details

APN / Parcel Number

Primary APN	`415-160-14`
Alternative APN	`415-0160-014-00`

Exterior

Lot Area	7,268 sqft (0.167 acres)

Location & Zoning

Street Address	21406 OAK ST
City	CASTRO VALLEY
State	CA
Zip	94546-6836
Property Category	Public Works
Property Type	Public Works > Recreational Vacant Land
Legal Description	LOT: 00015 BLK: AR: 0416 PAGE: 0160
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	3
Census Block	3019
Census Tract	431200

Owner

21406 Oak St, recreational vacant land, is owned by a company.

Source: Alameda County records, as of August 5, 2026

Owner of Record	Company Name on File
Mailing Address	PO BOX 627, HAYWARD, CA 94543-0627
Owner Type	Company
Vesting	Company

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Record Updated	Sep 20, 2026

Tax Assessment & Valuation

The 2025 property tax bill for 21406 Oak St was $1,658.

Source: Alameda County assessment roll, as of August 5, 2026

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Unified School District	Hayward Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$129,158 (+2%) Land $129,158
2025	$1,658.00	$126,626 Land $126,626
2023	$1,601.00	$121,710 Land $121,710

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 21406 Oak St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.

Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File median of 31 policies
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	31 in force
Nearby Flood Claims	1 (2022)
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

The area around 21406 Oak St has no burnable land within ember reach, so its wildfire risk is not rated.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 549 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30

May also be available: Etheric Networks, GeoLinks, Sonic Telecom, T-Mobile, Unwired.