Contra Costa County property record for 834 Wirthman Ln, Clayton, CA 94517
| Property Type | Pasture |
|---|---|
| Lot Size | 10 acres (435,600 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $208,000 (May 2000) |
| Tax Bill | $3,650 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 204-140-016-5 |
| Primary APN | 204-140-016-5 |
|---|---|
| Alternative APN |
|
| Lot Area | 435,600 sqft |
|---|
| Street Address | 834 WIRTHMAN LN |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-9795 |
| Property Category | Agriculture or Farming |
| Property Type | Agriculture / Farming > Pasture |
| Local Zoning Code | A2 |
| Legal Description | T162PM39 PCL A |
| Legal Tract | 162PM39 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 1 |
| Census Block | 1039 |
| Census Tract | 355112 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 834 WIRTHMAN LN, CLAYTON, CA 94517-9795 |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 1, 2000 · Amount on Record |
| Deed Sale | May 1, 2000 · Amount on Record |
| Deed Document Number | 200087722 |
| Last Transfer Date | Mar 10, 2003 |
| Transfer Doc | 0000110634 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $326,075 (+2%) Land $326,075 | |
| 2025 | $3,650.00 (+3.31%) | $319,682 (+4.04%) Land $319,682 |
| 2023 | $3,533.00 (+0.71%) | $307,269 Land $307,269 |
| 2022 | $3,508.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective October 12, 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 |
| Flood Insurance Cost | Premium on Record median of 14 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 14 in force |
| Nearby Flood Claims | 2 (1982–2017) |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, 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 89% of the US · above 71% 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: FCC Broadband Data Collection, based on 6 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Unwired Fixed Wireless | 300 / 25 |
| Starlink Satellite | 280 / 30 |
No cell data coverage reported
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