Contra Costa County property record for 800 Diablo Downs Dr, Clayton, CA 94517 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1974 |
| Square Footage | 2,359 sqft Living Area |
| Lot Size | 40,470 sqft (0.929 acres) |
| Garage | Attached, 672 sqft |
| Occupancy | Owner Occupied |
| Tax Bill | $5,262.00 (2025) |
| Primary APN | 119-181-010-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Building Area | 2,359 sqft Living Area |
| 1st Floor | 2,149 sqft 1st Floor |
| Basement Area | 210 sqft Basement |
| Stories | 1 Stories |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplaces |
| Year Built | Built 1974 |
|---|---|
| Effective Year Built | Effective 1974 |
| Lot Area | 40,470 sqft (0.929 acres) |
| Parking Spaces | 2 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 672 sqft Garage |
| Cooling System | Central Cooling |
|---|---|
| Heating System | Forced Air with Air Conditioning Heating |
| Street Address | 800 DIABLO DOWNS DR |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1528 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | T03977 L0009 B |
| Legal Tract | 03977 |
| Legal Lot Number | 9 |
| Jurisdiction | CONTRA COSTA CA |
| Minor Civil Division | CENTRAL CONTRA COSTA |
| Census Blockgroup | 1 |
| Census Block | 1014 |
| Census Tract | 355306 |
Source: Contra Costa County records · APN 119-181-010-8
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 800 DIABLO DOWNS DR, CLAYTON, CA 94517-1528 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is a Company |
| Vesting | Owner is a Trust, Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Transfer Date | Feb 13, 2006 |
| Transfer Doc | 0000052881 |
| Record Refreshed | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $478,494 (+2%) Land $175,697 Building $302,797 | |
| 2025 | $5,262.00 (+3.75%) Homeowner's exemption | $469,112 (+4.04%) Land $172,252 Building $296,860 |
| 2023 | $5,072.00 (+0.88%) Homeowner's exemption | $450,898 Land $165,564 Building $285,334 |
| 2022 | $5,028.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Wildfire Risk | High above 85% of the US · above 65% of California |
|---|---|
| Wildfire Likelihood | About 1 in 132 per year |
| Exposure | Direct burnable vegetation at the parcel |
Values are read at the parcel center point; lenders make the official flood determination.
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