Contra Costa County property record for 813 Chert Pl, Clayton, CA 94517
| Property Type | Townhouse |
|---|---|
| Details | 3 bd · 2.5 ba · 1,749 sqft · built 1993 |
| Lot Size | 0.091 acres (3,947 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $215,000 (Apr 2012) |
| Tax Bill | $4,379 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 118-460-040-9 |
| Primary APN | 118-460-040-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 1,749 sqft Living Area |
| 1st Floor Area | 877 sqft |
| 2nd Floor Area | 872 sqft |
| Year Built | Built 1993 |
|---|---|
| Effective Year Built | Effective 1993 |
| Architectural Style | Townhouse |
| Lot Area | 3,947 sqft (0.091 acres) |
| Garage Type | Attached |
| Garage Area | 507 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 813 CHERT PL |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1231 |
| Property Category | Residential |
| Property Type | Residential > Condominium / Townhouse > Townhouse |
| Legal Description | T7311 L40 |
| Legal Subdivision | BLACK DIAMOND |
| Legal Tract | 7311 |
| Legal Lot Number | 40 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 355308 |
813 Chert Pl, a townhouse, is owned and occupied by two individuals who bought it in April 2012.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 813 CHERT PL, CLAYTON, CA 94517-1231 |
| 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.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 26, 2012 · Amount on File |
| Deed Sale | Apr 26, 2012 · Amount on File |
| Prior Sale | Dec 1, 2011 · Amount on File |
| Deed Document Number | 201295308 |
| Prior Transfer Date | Aug 24, 2007 |
| Prior Transfer Doc | 0000249717 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 813 Chert Pl was $4,379 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Clayton City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $275,439 (+2%) Land $166,545 Building $108,894 | |
| 2025 | $4,379.00 Homeowner's exemption | $270,039 Land $163,280 Building $106,759 |
| 2023 | $4,042.00 (+0.37%) Homeowner's exemption | $259,555 Land $156,941 Building $102,614 |
| 2022 | $4,027.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 813 Chert Pl in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 in force |
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 risk around 813 Chert Pl is moderate, ranking above 52% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 52% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within ember reach |
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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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.
Source: FCC Broadband Data Collection, based on 342 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures