4266 Gem Ave, Castro Valley, CA 94546 Property Records

Alameda County property record for 4266 Gem Ave, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	4 bd · 1.5 ba · 1,378 sqft · built 1947
Lot Size	0.137 acres (5,985 sqft)
Owner	Individual Name on Record
Last Sale	$186,000 (Apr 1997)
Tax Bill	$4,351 (2025)
Deeds & Mortgages	Aug 2017 Transfer Apr 2017 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`84C-669-27`

Property Details

APN / Parcel Number

Primary APN	`84C-669-27`
Alternative APN	`084C-0669-027-00`

Interior

Bedrooms	4 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,378 sqft Living Area
1st Floor Area	1,378 sqft

Exterior

Year Built	Built 1947
Effective Year Built	Effective 1947
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	5,985 sqft (0.137 acres)

Location & Zoning

Street Address	4266 GEM AVE
City	CASTRO VALLEY
State	CA
Zip	94546-4617
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00012 BLK: 0001 TR: 0807
Legal Tract	0807
Legal Block	1
Legal Lot Number	12
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	4
Census Block	4000
Census Tract	430800

Owner

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

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Name on Record
Mailing Address	4266 GEM AVE, CASTRO VALLEY, CA 94546-4617
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Aug 30, 2017	Quit Claim Deed, Transfer Quitclaim
Apr 27, 2017	Deed of Trust, Mortgage · Line of Credit CITIBANK

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Apr 15, 1997 · Amount on Record
Deed Sale	Apr 15, 1997 · Amount on Record
Deed Document Number	199795815
Last Transfer Date	Aug 30, 2017
Transfer Doc	0000191369
Record Updated	Sep 20, 2026

August 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Aug 30, 2017
Property Address	4266 GEM AVE, CASTRO VALLEY, CA 94546-4617
Document Number	0000191369
Instrument Date	Aug 30, 2017
Instrument	191369
Transaction Type	Transfer
Record Updated	Oct 6, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	4266 GEM AVE CASTRO VALLEY CA 945464617, CASTRO VALLEY, CA 94546-4617

April 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	4266 GEM AVE, CASTRO VALLEY, CA 94546-4617
Document Number	0000125913
Instrument Date	Apr 27, 2017
Transaction Type	Mortgage
Record Updated	Aug 21, 2018
Title Company	TITLE SERVICE AND LIAISON COMPANIES, INDECOMM GLOBAL SVCS

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	4266 GEM AVE CASTRO VALLEY CA 945464617, CASTRO VALLEY, CA 94546-4617

Mortgage

Document Number	0000125913
Date	Jun 9, 2017
Instrument	125913

Lender

Name	CITIBANK
Type	Federal Savings Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Jun 8, 2047

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

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		$301,144 (-0.32%) Land $92,194 Building $215,950
2025	$4,351.00 (+4.62%) Homeowner's exemption	$302,102 (+4.04%) Land $90,386 Building $211,716
2023	$4,159.00 Homeowner's exemption	$290,373 Land $86,877 Building $203,496	$884,880

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

Flood

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 minimal risk
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

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 777 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
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
T-Mobile Fixed Wireless	100 / 20

May also be available: GeoLinks.

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