3275 Hertlein Pl, Castro Valley, CA 94546 Property Records

Alameda County property record for 3275 Hertlein Pl, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,420 sqft · built 1998
Lot Size	0.181 acres (7,886 sqft)
Owner	Trust Name on File
Last Sale	$801,000 (Aug 2005)
Tax Bill	$13,702 (2025)
Deeds & Mortgages	Dec 2021 Mortgage Aug 2020 Line of Credit + 4 more
Flood Zone	Zone X (moderate risk)
APN	`84B-510-35`

Property Details

APN / Parcel Number

Primary APN	`84B-510-35`
Alternative APN	`084B-0510-035-00`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,420 sqft Living Area

Exterior

Year Built	Built 1998
Effective Year Built	Effective 1998
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	7,886 sqft (0.181 acres)
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	3275 HERTLEIN PL
City	CASTRO VALLEY
State	CA
Zip	94546-2900
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00011 BLK: TR: 5100
Legal Subdivision	TRACT 5100
Legal Tract	5100
Legal Lot Number	11
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	4
Census Block	4000
Census Tract	430600

Owner

3275 Hertlein Pl is owner-occupied and held in a trust since October 2020.

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

Owner of Record	Trust Name on File
Mailing Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Occupancy	Owner Occupied
Owner Type	Company
Vesting	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
Dec 16, 2021	Deed of Trust, Mortgage · Conventional Mortgage FIRST UNITED CU
Aug 6, 2020	Deed of Trust, Mortgage · Line of Credit 1ST UNITED SERVICES CU
Dec 1, 2020	Quit Claim Deed, Transfer ATTORNEY ONLY
Jul 6, 2020	Deed of Trust, Mortgage · Conventional Mortgage FIRST UNITED SVCS CU
Jun 17, 2019	Deed of Trust, Mortgage · Line of Credit FIRST UNITED CU
Nov 1, 2017	Deed of Trust, Mortgage · Conventional Mortgage FIRST UNITED CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Aug 12, 2005 · Amount on File
Deed Sale	Aug 12, 2005 · Amount on File
Prior Sale	Jul 29, 1998 · Amount on File
Deed Document Number	2005344928
Last Transfer Date	Oct 16, 2020
Transfer Doc	0000330691
Record Updated	Oct 29, 2026

December 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Transaction Type	Mortgage
Record Updated	Jan 11, 2022
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900

Mortgage

Document Number	0000398016
Date	Dec 16, 2021
Instrument	2021398016

Lender

Name	FIRST UNITED CU
Type	Credit Union
Address	PLEASANTON, CA 94588

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Jan 1, 2052

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000190409
Date	Aug 6, 2020
Instrument	2020190409

Lender

Name	1ST UNITED SERVICES CU
Type	Credit Union
Address	PLEASANTON, CA 94588

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Aug 5, 2050

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

December 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Dec 1, 2020
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Document Number	0000330691
Instrument Date	Oct 16, 2020
Instrument	330691
Transaction Type	Transfer
Record Updated	Feb 10, 2021
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	3275 HERTLEIN PL CASTRO VALLEY CA 945462900, CASTRO VALLEY, CA 94546-2900

July 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Document Number	0000164638
Instrument Date	Jul 6, 2020
Transaction Type	Mortgage
Record Updated	Sep 2, 2020
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	3275 HERTLEIN PL CASTRO VALLEY CA 945462900, CASTRO VALLEY, CA 94546-2900

Mortgage

Document Number	0000164638
Date	Jul 14, 2020
Instrument	164638

Lender

Name	FIRST UNITED SVCS CU
Type	Credit Union
Address	PLEASANTON, CA 94588

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jul 13, 2050

June 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Document Number	0000116166
Instrument Date	Jun 17, 2019
Transaction Type	Mortgage
Record Updated	Jul 26, 2019
Title Company	SERVICELINK CRS

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	3275 HERTLEIN PL CASTRO VALLEY CA 945462900, CASTRO VALLEY, CA 94546-2900

Mortgage

Document Number	0000116166
Date	Jun 19, 2019
Instrument	116166

Lender

Name	FIRST UNITED CU
Type	Credit Union
Address	PLEASANTON, CA 94588-2718

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Jun 18, 2049

Interest

Rate Type	Adjustable Rate

November 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	3275 HERTLEIN PL, CASTRO VALLEY, CA 94546-2900
Document Number	0000246887
Instrument Date	Nov 1, 2017
Transaction Type	Mortgage
Record Updated	Aug 28, 2018
Title Company	NORTH AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	3275 HERTLEIN PL CASTRO VALLEY CA 945462900, CASTRO VALLEY, CA 94546-2900

Mortgage

Document Number	0000246887
Date	Nov 8, 2017
Instrument	246887

Lender

Name	FIRST UNITED CU
Type	Funding / Finance Company
Address	PLEASANTON, CA 94588

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Nov 7, 2047

Tax Assessment & Valuation

The 2025 property tax bill for 3275 Hertlein Pl was $13,702 with a homeowner's exemption.

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		$1,109,417 (+1.36%) Land $334,925 Building $781,492
2025	$13,702.00 Homeowner's exemption	$1,094,534 Land $328,360 Building $766,174
2023	$13,201.00 Homeowner's exemption	$1,052,040 Land $315,612 Building $736,428	$1,073,160

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

Flood

FEMA maps place 3275 Hertlein Pl in Zone X, an area of moderate flood risk.

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
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 3275 Hertlein Pl 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 769 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
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks, Unwired, Verizon.

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