18531 Agate Ct, Castro Valley, CA 94546 Property Records

Alameda County property record for 18531 Agate Ct, Castro Valley, CA 94546

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,769 sqft · built 1990
Lot Size	0.203 acres (8,858 sqft)
Owner	2 Company Names on Record
Last Sale	$1,060,000 (Jun 2018)
Tax Bill	$15,018 (2025)
Deeds & Mortgages	Jan 2026 Transfer Oct 2019 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`84D-1211-31`

Property Details

APN / Parcel Number

Primary APN	`84D-1211-31`
Alternative APN	`084D-1211-031-00`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,769 sqft Living Area

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1991
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	8,858 sqft (0.203 acres)

Location & Zoning

Street Address	18531 AGATE CT
City	CASTRO VALLEY
State	CA
Zip	94546-2266
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00002 BLK: PM: 0182 PAGE: 0089
Legal Subdivision	PARCEL MAP 5392
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	2
Census Block	2007
Census Tract	430300

Owner

Source: Alameda County records, as of August 26, 2026

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

Owner of Record	2 Company Names on Record
Mailing Address	18531 AGATE CT, CASTRO VALLEY, CA 94546-2266
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Revocable Trust

Deeds, Mortgages & Sale History

Date	Document
Jan 2, 2026	Intrafamily Transfer, Transfer
Oct 18, 2019	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS
Jun 20, 2018	Grant Deed, Transfer · Conventional Mortgage UNITED WHOLESALE MORTGAGE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 20, 2018 · Amount on Record
Deed Sale	Jun 20, 2018 · Amount on Record
Deed Document Number	2018121495
Prior Transfer Date	Mar 21, 2011
Prior Transfer Doc	0000095984
Record Updated	Oct 29, 2026

January 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	ALAMEDA CA
Recording Date	Jan 2, 2026
Property Address	18531 AGATE CT, CASTRO VALLEY, CA 94546-2266
Document Number	0000000409
Map Reference	MB 182 PG 89
Instrument Date	Nov 18, 2025
Instrument	2026000409
Transaction Type	Transfer
Record Updated	Feb 12, 2026

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	18531 AGATE CT, CASTRO VALLEY, CA 94546-2266

October 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18531 AGATE CT, CASTRO VALLEY, CA 94546-2266
Document Number	0000216734
Instrument Date	Oct 18, 2019
Transaction Type	Mortgage
Record Updated	Nov 14, 2019
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	18531 AGATE CT CASTRO VALLEY CA 945462266, CASTRO VALLEY, CA 94546-2266

Mortgage

Document Number	0000216734
Date	Oct 24, 2019
Instrument	216734

Lender

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

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Oct 23, 2049

June 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jun 20, 2018
Property Address	18531 AGATE CT, CASTRO VALLEY, CA 94546-2266
Document Number	0000121495
Map Reference	MB 182 PG 89
Instrument Date	Jun 15, 2018
Instrument	2018121495
Transaction Type	Transfer
Record Updated	Aug 19, 2021
Title Company	WFG NATIONAL TITLE INSURANCE

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
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
Address	5585 BALDWIN WAY, PLEASANTON, CA 94588-3682

Mortgage

Document Number	0000121496
Date	Jun 20, 2018
Instrument	2018121496

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2048

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		$1,223,193 (+1.42%) Land $369,058 Building $861,135
2025	$15,018.00 (+3.77%) Homeowner's exemption	$1,206,078 (+4.04%) Land $361,823 Building $844,255
2023	$14,473.00 Homeowner's exemption	$1,159,247 Land $347,774 Building $811,473	$1,129,680

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 724 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 · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20

May also be available: Etheric Networks, GeoLinks, T-Mobile.

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