18559 Mountain Ln, Castro Valley, CA 94552 Property Records

Alameda County property record for 18559 Mountain Ln, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,260 sqft · built 1966
Lot Size	0.525 acres (22,852 sqft)
Owner	Company Name on Record
Last Sale	$600,000 (Sep 2002)
Tax Bill	$11,040 (2025)
Deeds & Mortgages	Mar 2021 Mortgage Jun 2019 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`85-1604-64`

Property Details

APN / Parcel Number

Primary APN	`85-1604-64`
Alternative APN	`085-1604-064-00`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	2,260 sqft Living Area

Exterior

Year Built	Built 1966
Effective Year Built	Effective 1968
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	22,852 sqft (0.525 acres)

Location & Zoning

Street Address	18559 MOUNTAIN LN
City	CASTRO VALLEY
State	CA
Zip	94552-1846
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00042 BLK: 000A TR: 2478
Legal Subdivision	TRACT 2478
Legal Tract	2478
Legal Block	A
Legal Lot Number	42
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1016
Census Tract	430102

Owner

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

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Company Name on Record
Mailing Address	18559 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1846
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 3, 2021	Deed of Trust, Mortgage · Conventional Mortgage PENNYMAC LOAN SERVICES LLC
Jun 10, 2019	Affidavit of Death, Transfer ATTORNEY ONLY
Jun 10, 2019	Quit Claim Deed, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 3, 2002 · Amount on Record
Deed Sale	Sep 3, 2002 · Amount on Record
Deed Document Number	2002381133
Last Transfer Date	May 8, 2019
Transfer Doc	0000108833
Record Updated	Oct 29, 2026

March 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18559 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1846
Transaction Type	Mortgage
Record Updated	Apr 1, 2021
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	18559 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1846

Mortgage

Document Number	0000088913
Date	Mar 3, 2021
Instrument	2021088913

Lender

Name	PENNYMAC LOAN SERVICES LLC
Type	Mortgage Company
Address	WESTLAKE VILLAGE, CA 91361

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 1, 2051

June 2019: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	ALAMEDA CA
Recording Date	Jun 10, 2019
Property Address	18559 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1846
Document Number	0000108832
Instrument Date	May 8, 2019
Instrument	108832
Transaction Type	Transfer
Record Updated	Jul 26, 2019
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	18559 MOUNTAIN LN CASTRO VALLEY CA 945521846, CASTRO VALLEY, CA 94552-1846

June 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	ALAMEDA CA
Recording Date	Jun 10, 2019
Property Address	18559 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1846
Document Number	0000108833
Instrument Date	May 8, 2019
Instrument	108833
Transaction Type	Transfer
Record Updated	Jul 26, 2019
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	18559 MOUNTAIN LN CASTRO VALLEY CA 945521846, CASTRO VALLEY, CA 94552-1846

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		$879,295 (+1.19%) Land $265,888 Building $620,407
2025	$11,040.00 (+3.89%) Homeowner's exemption	$868,920 (+4.04%) Land $260,676 Building $608,244
2023	$10,627.00 Homeowner's exemption	$835,187 Land $250,556 Building $584,631	$1,310,940

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

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

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

Wildfire Risk	Moderate above 63% of the US · lower than 61% of California
Wildfire Likelihood	0.2% 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 389 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL 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: Unwired.

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