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16825 Hallmark Ct, Castro Valley, CA 94552 Property Records

Alameda County property record for 16825 Hallmark Ct, Castro Valley, CA 94552

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,098 sqft · built 1987
Lot Size0.675 acres (29,400 sqft)
OwnerTrust Name on File
Last Sale$802,000 (Dec 2003)
Tax Bill$14,241 (2025)
Deeds & MortgagesJul 2019 Line of Credit
Apr 2019 Transfer
Flood ZoneZone X (minimal risk)
APN85-6314-57

Property Details

APN / Parcel Number

Primary APN85-6314-57
Alternative APN
  • 085-6314-057-00

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Total Rooms8 Rooms
Stories2 Stories
Building Area2,098 sqft Living Area

Exterior

Year BuiltBuilt 1987
Effective Year BuiltEffective 1987
Architectural StyleL-Shape
Construction TypeWood
Lot Area29,400 sqft (0.675 acres)

Location & Zoning

Street Address16825 HALLMARK CT
CityCASTRO VALLEY
StateCA
Zip94552-1632
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT: 00055 BLK: TR: 5055
Legal Tract5055
Legal Lot Number55
JurisdictionALAMEDA CA
Township / Civil DivisionHAYWARD
Census Block Group1
Census Block1001
Census Tract430200

Owner

16825 Hallmark Ct is owner-occupied and held in a trust since January 2016.

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

Owner of RecordTrust Name on File
Mailing Address16825 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

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

DateDocument
Jul 29, 2019Deed of Trust, Mortgage · Line of Credit
CITYBANK
Apr 10, 2019Affidavit of Death, Transfer
ATTORNEY ONLY

Assessor's Deed Record

Deed NamesName on Deed
Last SaleDec 26, 2003 · Amount on File
Deed SaleDec 26, 2003 · Amount on File
Deed Document Number2003741194
Last Transfer DateJan 4, 2016
Transfer Doc0000002189
Record UpdatedOct 29, 2026

July 2019: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionALAMEDA CA
Property Address16825 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Transaction TypeMortgage
Record UpdatedFeb 5, 2021
Title CompanyOLD REPUBLIC TITLE

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000144994
DateJul 29, 2019
Instrument2019144994
Lender
NameCITYBANK
TypeBank
AddressSIOUX FALLS, SD 57104
Agreement
TypeLine of Credit
AmountAmount on Record
Interest
Rate TypeAdjustable Rate
Change FrequencyMonthly

April 2019: Affidavit of Death, Transfer

Document TypeAffidavit of Death
JurisdictionALAMEDA CA
Recording DateApr 10, 2019
Property Address16825 HALLMARK CT, CASTRO VALLEY, CA 94552-1632
Document Number0000064355
Instrument DateMar 27, 2019
Instrument64355
Transaction TypeTransfer
Record UpdatedMar 26, 2020
Title CompanyATTORNEY ONLY

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipPersonal Trust
Address16825 HALLMARK CT CASTRO VALLEY CA 945521632, CASTRO VALLEY, CA 94552-1632

Tax Assessment & Valuation

The 2025 property tax bill for 16825 Hallmark Ct was $14,241 with a homeowner's exemption.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyAlameda County
Unified School DistrictCastro Valley Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$1,156,011 (+1.39%) Land $348,903 Building $814,108
2025$14,241.00 Homeowner's exemption$1,140,210 Land $342,063 Building $798,147
2023$13,722.00 Homeowner's exemption$1,095,940 Land $328,782 Building $767,158$1,414,440

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

Flood

FEMA maps place 16825 Hallmark Ct in Zone X, an area of minimal flood risk.

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

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it

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

Wildfire

Wildfire risk around 16825 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 RiskHigh
above 71% of the US · above 46% of California
Wildfire Likelihood0.3% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 SystemEAST BAY MUD
serves 1,468,000 people · EPA ID CA0110005
Water SourceSurface water
Last State InspectionDec 2021
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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

ProviderMax 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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