6668 Giannini Ct, Castro Valley, CA 94552 Property Records

Alameda County property record for 6668 Giannini Ct, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,840 sqft · built 1985
Lot Size	0.16 acres (6,950 sqft)
Owner	Trust Name on File
Last Sale	$550,000 (Oct 2012)
Tax Bill	$8,778 (2025)
Deeds & Mortgages	Mar 2018 Line of Credit Mar 2018 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`85A-6404-49`

Property Details

APN / Parcel Number

Primary APN	`85A-6404-49`
Alternative APN	`085A-6404-049-00`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	1,840 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1985
Effective Year Built	Effective 1985
Architectural Style	L-Shape
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Tile
Lot Area	6,950 sqft (0.16 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	6668 GIANNINI CT
City	CASTRO VALLEY
State	CA
Zip	94552-5079
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Legal Description	LOT: 00191 BLK: TR: 4468
Legal Tract	4468
Legal Lot Number	191
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	2
Census Block	2005
Census Tract	430101

Owner

6668 Giannini Ct is owner-occupied and held in a trust since October 2012.

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

Owner of Record	Trust Name on File
Mailing Address	6668 GIANNINI CT, CASTRO VALLEY, CA 94552-5079
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
Mar 16, 2018	Deed of Trust, Mortgage · Line of Credit HSBC BK USA NA
Mar 16, 2018	Deed of Trust, Mortgage · Conventional Mortgage HSBC BK USA NA

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Oct 11, 2012 · Amount on File
Deed Sale	Oct 11, 2012 · Amount on File
Deed Document Number	2012334859
Prior Transfer Date	May 9, 1997
Prior Transfer Doc	0000136925
Record Updated	Oct 29, 2026

March 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	6668 GIANNINI CT, CASTRO VALLEY, CA 94552-5079
Document Number	0000059030
Instrument Date	Mar 16, 2018
Transaction Type	Mortgage
Record Updated	Apr 9, 2018
Title Company	BOSTON NATIONAL TITLE LLC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	6668 GIANNINI CT CASTRO VALLEY CA 945525079, CASTRO VALLEY, CA 94552-5079

Mortgage

Document Number	0000059030
Date	Mar 23, 2018
Instrument	59030

Lender

Name	HSBC BK USA NA
Type	Bank
Address	NEW YORK, NY 10018

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Mar 22, 2048

Interest

Rate Type	Adjustable Rate

March 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	6668 GIANNINI CT, CASTRO VALLEY, CA 94552-5079
Document Number	0000128848
Instrument Date	Mar 16, 2018
Transaction Type	Mortgage
Record Updated	Jul 17, 2018
Title Company	BOSTON NATIONAL TITLE LLC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	6668 GIANNINI CT CASTRO VALLEY CA 945525079, CASTRO VALLEY, CA 94552-5079

Mortgage

Document Number	0000128848
Date	Jun 29, 2018
Instrument	128848

Lender

Name	HSBC BK USA NA
Type	Bank
Address	NEW YORK, NY 10018

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jun 28, 2048

Tax Assessment & Valuation

The 2025 property tax bill for 6668 Giannini Ct was $8,778 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		$683,800 (+0.97%) Land $207,240 Building $483,560
2025	$8,778.00 Homeowner's exemption	$677,258 Land $203,177 Building $474,081
2023	$8,439.00 Homeowner's exemption	$650,963 Land $195,289 Building $455,674	$1,133,010

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

Flood

FEMA maps place 6668 Giannini 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 6668 Giannini Ct is high, ranking above 76% of the US, with a 0.5% annual chance of wildfire.

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

Wildfire Risk	High above 76% of the US · above 52% of California
Wildfire Likelihood	0.5% 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 411 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20
AT&T DSL	100 / 20

May also be available: Etheric Networks.

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