Alameda County property record for 8600 Oak Tree Ln, Castro Valley, CA 94552
| Property Type | Rural Home |
|---|---|
| Details | 4 bd · 5 ba · 4,026 sqft · built 1977 |
| Lot Size | 11.3 acres (494,005 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $11,509 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 85-5000-1-19 |
| Primary APN | 85-5000-1-19 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 5 Baths |
| Total Rooms | 13 Rooms |
| Stories | 2 Stories |
| Building Area | 4,026 sqft Living Area |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1978 |
| Construction Type | Wood |
| Lot Area | 494,005 sqft |
| Terrain | Gentle Slope |
| Parking Spaces | 7 Parking Spaces |
| Street Address | 8600 OAK TREE LN |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-9732 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Rural Home |
| Legal Description | LOT: 00019 BLK: 0001 AR: 0085 PAGE: 5000 |
| Legal Subdivision | EAST BAY CC |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 430101 |
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | PO BOX 3839, SAN RAMON, CA 94583-8839 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Mar 2, 1998 |
| Transfer Doc | 0000099768 |
| Record Updated | Sep 20, 2026 |
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 | $969,391 (+1.27%) Land $347,246 Building $629,145 | ||
| 2025 | $11,509.00 (+3.46%) Homeowner's exemption | $957,250 (+4.04%) Land $340,438 Building $616,812 | |
| 2023 | $11,124.00 Homeowner's exemption | $920,082 Land $327,219 Building $592,863 | $2,530,710 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 87% of the US · above 68% of California |
|---|---|
| Wildfire Likelihood | 1% annual chance |
| Exposure | Direct burnable vegetation |
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 | NORRIS CANYON PROPERTY OWNERS ASSN private · serves 50 people · EPA ID CA0103040 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Apr 2025 |
| Lead | Under 1 ppb (2025) action level 15 ppb |
| Copper | 2.25 mg/L (2017) action level 1.3 mg/L |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Lead service line inventory currently in violation since Oct 2024 |
| Monitoring and Reporting | 1 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.
Source: FCC Broadband Data Collection, based on 7 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Starlink Satellite | 280 / 30 |
4G LTE only, no 5G reported
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