18686 Mount Lassen Dr, Castro Valley, CA 94552 Property Records

Alameda County property record for 18686 Mount Lassen Dr, Castro Valley, CA 94552

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,084 sqft · built 1990
Lot Size	0.225 acres (9,800 sqft)
Owner	2 Individual Names on File
Last Sale	$730,000 (Oct 2007)
Tax Bill	$12,100 (2025)
Deeds & Mortgages	Jun 2021 Mortgage Feb 2018 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`85A-6406-15`

Property Details

APN / Parcel Number

Primary APN	`85A-6406-15`
Alternative APN	`085A-6406-015-00`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,084 sqft Living Area

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1990
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	9,800 sqft (0.225 acres)

Location & Zoning

Street Address	18686 MOUNT LASSEN DR
City	CASTRO VALLEY
State	CA
Zip	94552-1930
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00072 BLK: TR: 5338
Legal Tract	5338
Legal Lot Number	72
Jurisdiction	ALAMEDA CA
Township / Civil Division	HAYWARD
Census Block Group	3
Census Block	3003
Census Tract	430101

Owner

18686 Mount Lassen Dr is owned and occupied by two individuals who bought it in October 2007.

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

Owner of Record	2 Individual Names on File
Mailing Address	18686 MOUNT LASSEN DR, CASTRO VALLEY, CA 94552-1930
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

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
Jun 25, 2021	Deed of Trust, Mortgage · Conventional Mortgage FINANCE OF AMERICA COMMERCIAL
Feb 9, 2018	Deed of Trust, Mortgage · Line of Credit CITIBANK NYS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 5, 2007 · Amount on File
Deed Sale	Oct 5, 2007 · Amount on File
Prior Sale	Sep 10, 1996 · Amount on File
Deed Document Number	2007352129
Record Updated	Oct 29, 2026

June 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18686 MOUNT LASSEN DR, CASTRO VALLEY, CA 94552-1930
Transaction Type	Mortgage
Record Updated	Jul 14, 2021
Title Company	OLD REPUBLIC TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	18686 MOUNT LASSEN DR, CASTRO VALLEY, CA 94552-1930

Mortgage

Document Number	0000228874
Date	Jun 25, 2021
Instrument	2021228874

Lender

Name	FINANCE OF AMERICA COMMERCIAL
Type	Mortgage Company
Address	CONSHOHOCKEN, PA 19428

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Jul 1, 2051

February 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	ALAMEDA CA
Property Address	18686 MOUNT LASSEN DR, CASTRO VALLEY, CA 94552-1930
Document Number	0000044316
Instrument Date	Feb 9, 2018
Transaction Type	Mortgage
Record Updated	Mar 20, 2018
Title Company	TITLE SERVICE AND LIAISON COMPANIES

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	18686 MOUNT LASSEN DR CASTRO VALLEY CA 945521930, CASTRO VALLEY, CA 94552-1930

Mortgage

Document Number	0000044316
Date	Mar 5, 2018
Instrument	44316

Lender

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

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Mar 4, 2048

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 18686 Mount Lassen Dr was $12,100 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		$970,973 (+1.27%) Land $293,392 Building $684,581
2025	$12,100.00 Homeowner's exemption	$958,803 Land $287,641 Building $671,162
2023	$11,652.00 Homeowner's exemption	$921,580 Land $276,474 Building $645,106	$1,082,970

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

Flood

FEMA maps place 18686 Mount Lassen Dr in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2017.

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	2 in force
Nearby Flood Claims	2 (2017–2022)
Claims Outside the SFHA	2 of 2
Most Recent Claim	Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides

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

Wildfire risk around 18686 Mount Lassen Dr is high, ranking above 77% of the US, with a 0.4% annual chance of wildfire.

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

Wildfire Risk	High above 77% of the US · above 53% of California
Wildfire Likelihood	0.4% 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 207 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 · Fiber in parts of the area	100 / 20

May also be available: Etheric Networks.

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