16873 Hallmark Ct, Castro Valley, CA 94552 Property Records

Alameda County property record for 16873 Hallmark Ct, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,830 sqft · built 1987
Lot Size	0.2 acres (8,700 sqft)
Owner	2 Individual Names on File
Last Sale	$735,000 (Nov 2012)
Tax Bill	$11,466 (2025)
Deeds & Mortgages	Oct 2020 Mortgage Jan 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`85-6314-62`

Property Details

APN / Parcel Number

Primary APN	`85-6314-62`
Alternative APN	`085-6314-062-00`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	2,830 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1987
Effective Year Built	Effective 1987
Architectural Style	L-Shape
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Tile
Lot Area	8,700 sqft (0.2 acres)
View / Lot	Bay

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	16873 HALLMARK CT
City	CASTRO VALLEY
State	CA
Zip	94552-1632
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	P
Legal Description	LOT: 00050 BLK: TR: 5055
Legal Subdivision	TRACT 5055
Legal Tract	5055
Legal Lot Number	50
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1001
Census Tract	430200

Owner

16873 Hallmark Ct is owned and occupied by two individuals who bought it in November 2012.

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

Owner of Record	2 Individual Names on File
Mailing Address	16873 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Occupancy	Owner Occupied
Owner Type	Individual

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
Oct 20, 2020	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LOANS LLC
Jan 27, 2020	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Nov 21, 2012 · Amount on File
Deed Sale	Nov 21, 2012 · Amount on File
Deed Document Number	2012390075
Prior Transfer Date	Jan 21, 1998
Prior Transfer Doc	0000082807
Record Updated	Oct 29, 2026

October 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	16873 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	16873 HALLMARK CT, CASTRO VALLEY, CA 94552-1632

Mortgage

Document Number	0000278657
Date	Oct 20, 2020
Instrument	2020278657

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	358 Months
Due	Aug 1, 2050

January 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	16873 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Document Number	0000025339
Instrument Date	Jan 27, 2020
Transaction Type	Mortgage
Record Updated	Apr 10, 2020
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	16873 HALLMARK CT CASTRO VALLEY CA 945521632, CASTRO VALLEY, CA 94552-1632

Mortgage

Document Number	0000025339
Date	Feb 5, 2020
Instrument	25339

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Feb 4, 2050

Tax Assessment & Valuation

The 2025 property tax bill for 16873 Hallmark Ct was $11,466 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		$916,160 (+1.23%) Land $276,948 Building $646,212
2025	$11,466.00 Homeowner's exemption	$905,064 Land $271,519 Building $633,545
2023	$11,039.00 Homeowner's exemption	$869,923 Land $260,977 Building $608,946	$1,577,880

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

Flood

FEMA maps place 16873 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 16873 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	Direct burnable vegetation

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.

Cell Coverage

5G and 4G LTE (outdoors only)

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