21953 Ada St, Hayward (Castro Valley), CA 94546 Property Records

Alameda County property record for 21953 Ada St, Hayward, CA 94546

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.5 ba · 1,554 sqft · built 1948
Lot Size	0.147 acres (6,390 sqft)
Owner	2 Individual Names on Record
Last Sale	$915,000 (Jun 2025)
Tax Bill	$10,938 (2025)
Deeds & Mortgages	Mar 2023 Sale & Mortgage Jun 2018 Transfer + 1 more
Flood Zone	Zone X (moderate risk)
APN	`415-90-56`

Property Details

APN / Parcel Number

Primary APN	`415-90-56`
Alternative APN	`415-0090-056-00`

Interior

Bedrooms	3 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,554 sqft Living Area

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1948
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	6,390 sqft (0.147 acres)
Garage Type	Carport
Carport	Carport

Location & Zoning

Street Address	21953 ADA ST
City	CASTRO VALLEY
State	CA
Zip	94546-6305
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00003 BLK: 0004 TR: 0871
Legal Subdivision	871 EDEN TOWNSHIP
Legal Tract	0871
Legal Block	4
Legal Lot Number	3
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1004
Census Tract	431200

Owner

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

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on Record
Mailing Address	21953 ADA ST, CASTRO VALLEY, CA 94546-6305
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Mar 15, 2023	Grant Deed, Transfer · Conventional Mortgage ROCKET MORTGAGE LLC
Jun 18, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY
Jun 18, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 17, 2025 · Amount on Record
Deed Sale	Jun 17, 2025 · Amount on Record
Prior Sale	Mar 15, 2023 · Amount on Record
Deed Document Number	202577470
Prior Transfer Date	Oct 31, 2022
Prior Transfer Doc	0000182676
Record Updated	Sep 20, 2026

March 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Mar 15, 2023
Property Address	21953 ADA ST, HAYWARD, CA 94546-6305
Document Number	0000030326
Map Reference	MB 27 PG 68
Instrument Date	Mar 7, 2023
Instrument	2023030326
Transaction Type	Transfer
Record Updated	Apr 7, 2023
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$885.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	21953 ADA ST, CASTRO VALLEY, CA 94546-6305

Mortgage

Document Number	0000030327
Date	Mar 15, 2023
Instrument	2023030327

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 1, 2053

June 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jun 18, 2018
Property Address	21953 ADA ST, HAYWARD, CA 94546-6305
Document Number	0000120264
Instrument Date	Jun 12, 2018
Instrument	120264
Transaction Type	Transfer
Record Updated	Jul 2, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21953 ADA ST CASTRO VALLEY CA 945466305, CASTRO VALLEY, CA 94546-6305

June 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jun 18, 2018
Property Address	21953 ADA ST, HAYWARD, CA 94546-6305
Document Number	0000120265
Instrument Date	Jun 12, 2018
Instrument	120265
Transaction Type	Transfer
Record Updated	Jul 2, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	21953 ADA ST CASTRO VALLEY CA 945466305, CASTRO VALLEY, CA 94546-6305

Tax Assessment & Valuation

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	Assessed Market Value
2026		$926,300 (+10.6%) Land $279,990 Building $653,310
2025	$10,938.00 (+3.03%)	$837,521 (+2.64%) Land $251,256 Building $586,265
2023	$10,616.00	$816,000 Land $244,800 Building $571,200	$710,550

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

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 moderate risk
500-Year Floodplain	Yes 0.2% annual chance
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 15 policies
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	15 in force
Nearby Flood Claims	1 (1996)
Most Recent Claim	Dec 1996 · rainfall accumulation

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

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 744 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Sonic Telecom Fiber	10,000 / 10,000
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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