Alameda County property record for 18951 Edwin Markham Dr, Castro Valley, CA 94552 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,927 sqft · built 1985 |
| Lot Size | 0.119 acres (5,185 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $425,000 (May 1998) |
| Tax Bill | $8,794 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 85A-6403-30 |
| Primary APN | 85A-6403-30 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,927 sqft Living Area |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 5,185 sqft (0.119 acres) |
| Street Address | 18951 EDWIN MARKHAM DR |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-5068 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00023 BLK: TR: 4468 |
| Legal Tract | 4468 |
| Legal Lot Number | 23 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 430101 |
Source: Alameda County records · APN 85A-6403-30
Assessment roll updated August 5, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 18951 EDWIN MARKHAM DR, CASTRO VALLEY, CA 94552-5068 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | May 01, 1998 · Amount on Record |
| Deed Sale | May 01, 1998 · Amount on Record |
| Deed Document Number | 1998146122 |
| Last Transfer Date | Apr 12, 2012 |
| Transfer Doc | 0000134237 |
| Record Updated | Sep 20, 2026 |
Source: Alameda County records · Assessment roll updated August 5, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $685,154 (+0.97%) Land $207,646 Building $484,508 | ||
| 2025 | $8,794.00 (+4.02%) Homeowner's exemption | $678,584 (+4.04%) Land $203,575 Building $475,009 | |
| 2023 | $8,454.00 Homeowner's exemption | $652,238 Land $195,671 Building $456,567 | $1,412,100 |
Source: FEMA National Flood Hazard Layer, Alameda County (06001C), updated May 25, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Wildfire Risk | High above 74% of the US · above 50% of California |
|---|---|
| Wildfire Likelihood | About 1 in 287 per year |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
Values are read at the parcel center point; lenders make the official flood determination.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 207 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| Verizon | Fixed Wireless | 300 / 20 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: AT&T, Etheric Communications, LLC.. Availability varies by address; speeds are provider-advertised maximums, not measured.
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