4143 Berdina Rd, Castro Valley, CA 94546 Property Records

Alameda County property record for 4143 Berdina Rd, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,040 sqft · built 1942
Lot Size	0.172 acres (7,500 sqft)
Owner	2 Trust Names on File
Last Sale	$1,230,000 (Dec 2023)
Tax Bill	$15,591 (2025)
Deeds & Mortgages	Apr 2026 Transfer Apr 2026 Sale + 7 more
Flood Zone	Zone X (minimal risk)
APN	`84C-758-15`

Property Details

APN / Parcel Number

Primary APN	`84C-758-15`
Alternative APN	`084C-0758-015-00`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,040 sqft Living Area

Exterior

Year Built	Built 1942
Effective Year Built	Effective 1966
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	7,500 sqft (0.172 acres)

Location & Zoning

Street Address	4143 BERDINA RD
City	CASTRO VALLEY
State	CA
Zip	94546-3536
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00020 BLK: TR: 0542
Legal Subdivision	TRACT 542
Legal Tract	0542
Legal Lot Number	20
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	4
Census Block	4002
Census Tract	430800

Owner

4143 Berdina Rd is owner-occupied and held in a trust since December 2023.

Source: Alameda County records, as of September 22, 2026

Owner of Record	2 Trust Names on File
Mailing Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

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

Date	Document
Apr 21, 2026	Quit Claim Deed, Transfer NONE LISTED ON DOCUMENT
Apr 21, 2026	Grant Deed, Transfer NONE LISTED ON DOCUMENT
Dec 5, 2023	Intrafamily Transfer, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
Dec 5, 2023	Grant Deed, Transfer · Conventional Mortgage ROCKET MORTGAGE LLC
Sep 29, 2023	Deed of Trust, Mortgage · Conventional Mortgage YUON CHONG LAU ETAL
Sep 29, 2023	Deed of Trust, Mortgage · Conventional Mortgage YIMING HUANG
Sep 29, 2023	Deed of Trust, Mortgage · Conventional Mortgage TAI CUONG TRAN
Oct 18, 2023	Grant Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
Dec 21, 2018	Deed of Trust, Mortgage · ARM FIDELITY LENDING SOLUTIONS INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Dec 5, 2023 · Amount on File
Deed Sale	Dec 5, 2023 · Amount on File
Prior Sale	Oct 18, 2023 · Amount on File
Deed Document Number	2023142000
Prior Transfer Date	Dec 1, 2023
Prior Transfer Doc	0000141999
Record Updated	Oct 29, 2026

April 2026: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Apr 21, 2026
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Document Number	0000051897
Instrument Date	Apr 21, 2026
Instrument	202651897
Transaction Type	Transfer
Record Updated	Aug 27, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Quitclaim

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Sole Owner
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536

April 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Apr 21, 2026
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Document Number	0000051898
Instrument Date	Apr 21, 2026
Instrument	202651898
Transaction Type	Transfer
Record Updated	Jul 12, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Investor	Possibly a Property Investor

December 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Dec 5, 2023
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Document Number	0000141999
Map Reference	MB 29 PG 43
Instrument Date	Dec 1, 2023
Instrument	2023141999
Transaction Type	Transfer
Record Updated	Feb 2, 2024
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536

December 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Dec 5, 2023
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Document Number	0000142000
Map Reference	MB 29 PG 43
Instrument Date	Nov 30, 2023
Instrument	2023142000
Transaction Type	Transfer
Record Updated	Feb 2, 2024
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,353.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536

Mortgage

Document Number	0000142001
Date	Dec 5, 2023
Instrument	2023142001

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Jan 1, 2054

September 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Transaction Type	Mortgage
Record Updated	Oct 30, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536

Mortgage

Document Number	0000111810
Date	Sep 29, 2023
Instrument	2023111810

Lender

Name	YUON CHONG LAU ETAL
Type	Private Party
Address	2406 HIBISCUS DR, HAYWARD, CA 94545

Agreement

Type	Conventional Mortgage
Amount	Amount on Record

September 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Transaction Type	Mortgage
Record Updated	Oct 30, 2023
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536

Mortgage

Document Number	0000111809
Date	Sep 29, 2023
Instrument	2023111809

Lender

Name	YIMING HUANG
Type	Private Party
Address	169 WHIPPLE AVE, SAN FRANCISCO, CA 94112

Agreement

Type	Conventional Mortgage
Amount	Amount on Record

September 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Transaction Type	Mortgage
Record Updated	Oct 30, 2023

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000111811
Date	Sep 29, 2023
Instrument	2023111811

Lender

Name	TAI CUONG TRAN
Type	Private Party
Address	236 W PORTAL AVE, SAN FRANCISCO, CA 94127

Agreement

Type	Conventional Mortgage
Amount	Amount on Record

October 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Oct 18, 2023
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Document Number	0000122262
Map Reference	MB 29 PG 43
Instrument Date	Oct 16, 2023
Instrument	2023122262
Transaction Type	Transfer
Record Updated	Dec 5, 2023
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount on Record
Tax	$973.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	2777 GLAUSER DR, SAN JOSE, CA 95133-1408

December 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4143 BERDINA RD, CASTRO VALLEY, CA 94546-3536
Transaction Type	Mortgage
Record Updated	Feb 7, 2021
Title Company	NORTH AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000241797
Date	Dec 21, 2018
Instrument	2018241797

Lender

Name	FIDELITY LENDING SOLUTIONS INC
Type	Non-Lending Institution
Address	LA MIRADA, CA 90638

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Jan 1, 2049

Interest

Rate Type	Adjustable Rate
Rate	5.75%
Type Change Date	Jan 1, 2026
Change Frequency	Annually
Min Rate At Change	3.75%
Max Rate At Change	7.75%
Index	1-Year LIBOR
Max Rate	11.7%

Tax Assessment & Valuation

The 2025 property tax bill for 4143 Berdina Rd was $15,591.

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,272,691 (+2.01%) Land $383,907 Building $895,784
2025	$15,591.00 Homeowner's exemption	$1,247,600 Land $376,380 Building $878,220
2023	$9,333.00 Homeowner's exemption	$726,242 Land $190,599 Building $535,643	$789,210

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

Flood

FEMA maps place 4143 Berdina Rd in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

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
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	1 in force

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

Wildfire risk around 4143 Berdina Rd is low, with a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond 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 704 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 · DSL · Fixed Wireless in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
Starlink Satellite	280 / 30
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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