Contra Costa County property record for 457 Obsidian Way, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,455 sqft · built 1994 |
| Lot Size | 0.203 acres (8,855 sqft) |
| Owner | Trust Name on File |
| Last Sale | $605,000 (May 2001) |
| Tax Bill | $11,631 (2025) |
| Deeds & Mortgages | Oct 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 118-570-043 |
| Primary APN | 118-570-043 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,455 sqft Living Area |
| 1st Floor Area | 2,455 sqft |
| Year Built | Built 1994 |
|---|---|
| Effective Year Built | Effective 1995 |
| Lot Area | 8,855 sqft (0.203 acres) |
| Garage Type | Attached |
| Garage Area | 565 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 457 OBSIDIAN WAY |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-2011 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7257 L43 |
| Legal Subdivision | EAGLE PEAK |
| Legal Tract | 7257 |
| Legal Lot Number | 43 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 355307 |
457 Obsidian Way is owner-occupied and held in a trust since January 2016.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 457 OBSIDIAN WAY, CLAYTON, CA 94517-2011 |
| 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 | Name on Deed |
|---|---|
| Last Sale | May 25, 2001 · Amount on File |
| Deed Sale | May 25, 2001 · Amount on File |
| Prior Sale | Jun 28, 1995 · Amount on File |
| Deed Document Number | 2001142815 |
| Last Transfer Date | Jan 20, 2016 |
| Transfer Doc | 0000017362 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 457 OBSIDIAN WAY, CLAYTON, CA 94517-2011 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 457 OBSIDIAN WAY, CLAYTON, CA 94517-2011 |
| Document Number | 0000248220 |
|---|---|
| Date | Oct 23, 2020 |
| Instrument | 2020-248220 |
| Name | GUARANTEED RATE AFFINITY LLC |
|---|---|
| Type | Mortgage Company |
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2050 |
The 2025 property tax bill for 457 Obsidian Way was $11,631 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 | $929,850 (+2%) Land $355,032 Building $574,818 | |
| 2025 | $11,631.00 Homeowner's exemption | $911,619 Land $348,071 Building $563,548 |
| 2023 | $10,892.00 (+0.25%) Homeowner's exemption | $876,222 Land $334,556 Building $541,666 |
| 2022 | $10,865.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 457 Obsidian Way in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective October 12, 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 457 Obsidian Way is high, ranking above 73% 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 73% of the US · above 48% of California |
|---|---|
| Wildfire Likelihood | 0.3% 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 188 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Starlink Satellite | 280 / 30 |
May also be available: T-Mobile, Unwired, Verizon.
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