16890 Hallmark Ct, Castro Valley, CA 94552 Property Records

Alameda County property record for 16890 Hallmark Ct, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,262 sqft · built 1987
Lot Size	0.232 acres (10,100 sqft)
Owner	2 Individual Names on File
Last Sale	$1,530,000 (Sep 2021)
Tax Bill	$19,945 (2025)
Deeds & Mortgages	Aug 2022 Line of Credit Sep 2021 Sale & Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`85-6314-47`

Property Details

APN / Parcel Number

Primary APN	`85-6314-47`
Alternative APN	`085-6314-047-00`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	2,262 sqft Living Area

Exterior

Year Built	Built 1987
Effective Year Built	Effective 1987
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	10,100 sqft (0.232 acres)
Parking Spaces	3 Parking Spaces

Location & Zoning

Street Address	16890 HALLMARK CT
City	CASTRO VALLEY
State	CA
Zip	94552-1632
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00065 BLK: TR: 5055
Legal Tract	5055
Legal Lot Number	65
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1001
Census Tract	430200

Owner

16890 Hallmark Ct is owned and occupied by two individuals who bought it in September 2021.

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

Owner of Record	2 Individual Names on File
Mailing Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

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
Aug 2, 2022	Deed of Trust, Mortgage · Line of Credit COMERICA BANK
Sep 16, 2021	Grant Deed, Transfer · Conventional Mortgage ROCKET MORTGAGE LLC
Apr 13, 2021	Deed of Trust, Mortgage · Line of Credit BANK OF THE WEST

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 16, 2021 · Amount on File
Deed Sale	Sep 16, 2021 · Amount on File
Deed Document Number	2021313013
Prior Transfer Date	Sep 7, 2006
Prior Transfer Doc	0000352143
Record Updated	Oct 29, 2026

August 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Transaction Type	Mortgage
Record Updated	Aug 26, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632

Mortgage

Document Number	0000136761
Date	Aug 2, 2022
Instrument	2022136761

Lender

Name	COMERICA BANK
Type	Bank
Address	DALLAS, TX 75201

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	359 Months
Due	Jul 26, 2052

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

September 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Sep 16, 2021
Property Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Document Number	0000313013
Map Reference	MB 150 PG 92-98
Instrument Date	Sep 9, 2021
Instrument	2021313013
Transaction Type	Transfer
Record Updated	Oct 6, 2021
Title Company	CHICAGO TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,683.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632

Mortgage

Document Number	0000313014
Date	Sep 16, 2021
Instrument	2021313014

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2051

April 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Transaction Type	Mortgage
Record Updated	May 10, 2021
Title Company	STEWART TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	16890 HALLMARK CT, CASTRO VALLEY, CA 94552-1632

Mortgage

Document Number	0000146510
Date	Apr 13, 2021
Instrument	2021146510

Lender

Name	BANK OF THE WEST
Type	Bank
Address	OMAHA, NE 68154

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	361 Months
Due	May 1, 2051

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

The 2025 property tax bill for 16890 Hallmark Ct was $19,945 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		$1,528,000 (-5.89%) Land $460,500 Building $1,074,500
2025	$19,945.00 Homeowner's exemption	$1,623,635 Land $487,090 Building $1,136,545
2023	$18,518.00	$1,560,600 Land $468,180 Building $1,092,420	$1,498,680

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

Flood

FEMA maps place 16890 Hallmark Ct in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective May 25, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Wildfire risk around 16890 Hallmark Ct is high, ranking above 71% of the US, with a 0.3% annual chance of wildfire.

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

Wildfire Risk	High above 71% of the US · above 46% of California
Wildfire Likelihood	0.3% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20

May also be available: Unwired.

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