18535 Mountain Ln, Castro Valley, CA 94552 Property Records

Alameda County property record for 18535 Mountain Ln, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	3 bd · 5 ba · 1,475 sqft · built 1967
Lot Size	0.221 acres (9,632 sqft)
Owner	2 Individual Names on File
Last Sale	$855,000 (Sep 2018)
Tax Bill	$12,141 (2025)
Deeds & Mortgages	Aug 2021 Mortgage Jul 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`85-1605-66`

Property Details

APN / Parcel Number

Primary APN	`85-1605-66`
Alternative APN	`085-1605-066-00`

Interior

Bedrooms	3 Beds
Full Baths	5 Baths
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,475 sqft Living Area

Exterior

Year Built	Built 1967
Effective Year Built	Effective 1968
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	9,632 sqft (0.221 acres)

Location & Zoning

Street Address	18535 MOUNTAIN LN
City	CASTRO VALLEY
State	CA
Zip	94552-1833
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00002 BLK: 000B TR: 2478
Legal Subdivision	TRACT 2478
Legal Tract	2478
Legal Block	B
Legal Lot Number	2
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	1
Census Block	1016
Census Tract	430102

Owner

18535 Mountain Ln is owned and occupied by two individuals who bought it in September 2018.

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

Owner of Record	2 Individual Names on File
Mailing Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833
Occupancy	Owner Occupied
Owner Type	Individual

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
Aug 18, 2021	Deed of Trust, Mortgage · Conventional Mortgage LOANDEPOT.COM LLC
Jul 27, 2020	Deed of Trust, Mortgage · Conventional Mortgage LOANDEPOT.COM LLC
Sep 6, 2018	Grant Deed, Transfer · ARM PATELCO CU

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 6, 2018 · Amount on File
Deed Sale	Sep 6, 2018 · Amount on File
Deed Document Number	2018174145
Prior Transfer Date	Apr 12, 2005
Prior Transfer Doc	0000198282
Record Updated	Oct 29, 2026

August 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833
Transaction Type	Mortgage
Record Updated	Sep 8, 2021
Title Company	NORTH AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833

Mortgage

Document Number	0000280708
Date	Aug 18, 2021
Instrument	2021280708

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company
Address	FOOTHILL RANCH, CA 92610

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Aug 1, 2051

July 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	WFG LENDER SERVICES

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1855 MOUNTIAN LN, CASTRO VALLEY, CA 94552

Mortgage

Document Number	0000178116
Date	Jul 27, 2020
Instrument	2020178116

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company
Address	FOOTHILL RANCH, CA 92610

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Aug 1, 2050

September 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Sep 6, 2018
Property Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833
Document Number	0000174145
Map Reference	MB 50 PG 25-28
Instrument Date	Aug 28, 2018
Instrument	2018174145
Transaction Type	Transfer
Record Updated	Aug 19, 2021
Title Company	FIDELITY NATIONAL TITLE COMP

Transaction

Amount	Amount on Record
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	Joint Tenants
Address	18535 MOUNTAIN LN, CASTRO VALLEY, CA 94552-1833

Mortgage

Document Number	0000174146
Date	Sep 6, 2018
Instrument	2018174146

Lender

Name	PATELCO CU
Type	Credit Union

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2048

Interest

Rate Type	Adjustable Rate
Rate	3.75%
Type Change Date	Oct 1, 2025
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	5.75%
Index	1-Year CMT
Max Rate	9.75%

Tax Assessment & Valuation

The 2025 property tax bill for 18535 Mountain Ln was $12,141 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		$974,462 (+1.27%) Land $291,848 Building $689,614
2025	$12,141.00 Homeowner's exemption	$962,217 Land $286,125 Building $676,092
2023	$11,677.00	$916,721 Land $275,016 Building $641,705	$1,043,640

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

Flood

FEMA maps place 18535 Mountain Ln 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 18535 Mountain Ln 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 Risk	High above 71% of the US · above 46% of California
Wildfire Likelihood	0.3% 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 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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