Alameda County property record for 18897 Mount Lassen Dr, Castro Valley, CA 94552
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,102 sqft · built 1989 |
| Lot Size | 0.122 acres (5,300 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $610,000 (Sep 2003) |
| Tax Bill | $11,020 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 85A-6408-81 |
| Primary APN | 85A-6408-81 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,102 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1989 |
|---|---|
| Effective Year Built | Effective 1989 |
| Architectural Style | L-Shape |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Wood Shingle |
| Lot Area | 5,300 sqft (0.122 acres) |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 18897 MOUNT LASSEN DR |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-1918 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | PD |
| Legal Description | LOT: 00072 BLK: TR: 5500 |
| Legal Subdivision | TR 5500 |
| Legal Tract | 5500 |
| Legal Lot Number | 72 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 430101 |
18897 Mount Lassen Dr is owner-occupied and held in a trust since September 2003.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 18897 MOUNT LASSEN DR, CASTRO VALLEY, CA 94552-1918 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 12, 2003 · Amount on File |
| Deed Sale | Sep 12, 2003 · Amount on File |
| Deed Document Number | 2003541553 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 18897 Mount Lassen Dr was $11,020 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $877,584 (+1.19%) Land $265,375 Building $619,209 | ||
| 2025 | $11,020.00 Homeowner's exemption | $867,242 Land $260,172 Building $607,070 | |
| 2023 | $10,607.00 Homeowner's exemption | $833,570 Land $250,071 Building $583,499 | $1,224,990 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18897 Mount Lassen Dr 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 risk around 18897 Mount Lassen Dr is high, ranking above 74% 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 74% of the US · above 49% 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.
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 |
| 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.
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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