Contra Costa County property record for 471 Obsidian Way, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,448 sqft · built 1995 |
| Lot Size | 0.2 acres (8,710 sqft) |
| Owner | Trust Name on File |
| Last Sale | $422,000 (Jul 1998) |
| Tax Bill | $9,275 (2025) |
| Deeds & Mortgages | Mar 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 118-570-050-5 |
| Primary APN | 118-570-050-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,448 sqft Living Area |
| 1st Floor Area | 2,448 sqft |
| Year Built | Built 1995 |
|---|---|
| Effective Year Built | Effective 1996 |
| Lot Area | 8,710 sqft (0.2 acres) |
| Garage Type | Attached |
| Garage Area | 615 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 471 OBSIDIAN WAY |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-2011 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T7257 L50 |
| Legal Subdivision | EAGLE PEAK SUB 7257 |
| Legal Tract | 7257 |
| Legal Lot Number | 50 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 355307 |
471 Obsidian Way is owner-occupied and held in a trust since July 1998.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 471 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 | Jul 17, 1998 · Amount on File |
| Deed Sale | Jul 17, 1998 · Amount on File |
| Prior Sale | Nov 15, 1995 · Amount on File |
| Deed Document Number | 1998165097 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 471 OBSIDIAN WAY, CLAYTON, CA 94517-2011 |
| Document Number | 0000053686 |
| Instrument Date | Mar 12, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Apr 8, 2020 |
| Title Company | OLD REPUBLIC TITLE |
| Name | Verified Name |
|---|---|
| Address | 471 OBSIDIAN WAY CLAYTON CA 945172011, CLAYTON, CA 94517-2011 |
| Document Number | 0000053686 |
|---|---|
| Date | Mar 19, 2020 |
| Instrument | 53686 |
| Name | SF FIRE CU |
|---|---|
| Address | SAN FRANCISCO, CA 94118 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Mar 18, 2050 |
The 2025 property tax bill for 471 Obsidian Way was $9,275 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 | $718,292 (+2%) Land $191,877 Building $526,415 | |
| 2025 | $9,275.00 Homeowner's exemption | $704,209 Land $188,115 Building $516,094 |
| 2023 | $8,686.00 (+0.08%) Homeowner's exemption | $676,865 Land $180,811 Building $496,054 |
| 2022 | $8,679.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 471 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 471 Obsidian Way is high, ranking above 82% of the US, with a 0.5% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 82% of the US · above 61% of California |
|---|---|
| Wildfire Likelihood | 0.5% 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 | 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 70 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
May also be available: AT&T, Unwired, Verizon.
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