Contra Costa County property record for 870 Diablo Downs Dr, Clayton, CA 94517
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,479 sqft · built 1981 |
| Lot Size | 1.04 acres (45,715 sqft) |
| Owner | Company Name on Record |
| Last Sale | $360,000 (Feb 1996) |
| Tax Bill | $6,761 (2025) |
| Deeds & Mortgages | Jan 2026 Mortgage May 2023 Mortgage + 4 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 119-500-012-8 |
| Primary APN | 119-500-012-8 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,479 sqft Living Area |
| Gross Area | 3,136 sqft |
| 1st Floor Area | 2,479 sqft |
| Year Built | Built 1981 |
|---|---|
| Effective Year Built | Effective 1983 |
| Architectural Style | Ranch |
| Roof Material | Wood Shingle |
| Lot Area | 45,715 sqft |
| Garage Type | Attached |
| Garage Area | 657 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 870 DIABLO DOWNS DR |
|---|---|
| City | CLAYTON |
| State | CA |
| Zip | 94517-1560 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R40 |
| Legal Description | T04874 L0011 B |
| Legal Subdivision | SUBDIVISION 4874 |
| Legal Tract | 04874 |
| Legal Lot Number | 11 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1011 |
| Census Tract | 355306 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Jan 6, 2026 | Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA |
| May 9, 2023 | Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA |
| Jun 21, 2022 | Deed of Trust, Mortgage · Line of Credit BANK OF AMERICA NA |
| Sep 21, 2021 | Intrafamily Transfer, Transfer |
| Sep 21, 2021 | Intrafamily Transfer, Transfer |
| Sep 21, 2021 |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 28, 1996 · Amount on Record |
| Deed Sale | Feb 28, 1996 · Amount on Record |
| Prior Sale | Apr 1, 1994 · Amount on Record |
| Deed Document Number | 199635758 |
| Prior Transfer Date | Mar 28, 1994 |
| Prior Transfer Doc | 0000091349 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Transaction Type | Mortgage |
| Record Updated | Jan 15, 2026 |
| Title Company | BEST TITLE COMPANY, ESSENT TITLE INSURANCE INC |
| Name | Verified Name |
|---|---|
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000001021 |
|---|---|
| Date | Jan 6, 2026 |
| Instrument | 2026- 001021 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Address | 101 SOUTH TRYON STREET, CHARLOTTE, NC 28280 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Feb 1, 2056 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 5.87% |
| Adjustable | Adjustable Rate Rider |
| Type Change Date | Feb 1, 2033 |
| Change Frequency | 6 Months |
| Min Rate At Change | 2.75% |
| Max Rate At Change | 10.8% |
| Index | Other |
| Max Rate | 10.8% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Transaction Type | Mortgage |
| Record Updated | May 18, 2023 |
| Name | Verified Name |
|---|---|
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000042789 |
|---|---|
| Date | May 9, 2023 |
| Instrument | 2023-042789 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28255 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jun 1, 2053 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | TITLE365 |
| Name | Verified Name |
|---|---|
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000101580 |
|---|---|
| Date | Jun 21, 2022 |
| Instrument | 2022-101580 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Address | FORT WORTH, TX 76155 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 21, 2021 |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000262563 |
| Map Reference | MB 229 PG 47 |
| Instrument Date | Sep 14, 2021 |
| Instrument | 2021-262563 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 21, 2021 |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000262565 |
| Map Reference | MB 229 PG 47 |
| Instrument Date | Sep 14, 2021 |
| Instrument | 2021-262565 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Jurisdiction | CONTRA COSTA CA |
|---|---|
| Recording Date | Sep 21, 2021 |
| Property Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
| Document Number | 0000262564 |
| Map Reference | MB 229 PG 47 |
| Instrument Date | Sep 14, 2021 |
| Instrument | 2021-262564 |
| Record Updated | Nov 3, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 870 DIABLO DOWNS DR, CLAYTON, CA 94517-1560 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $609,991 (+2%) Land $240,604 Building $369,387 | |
| 2025 | $6,761.00 (+3.71%) | $598,032 (+4.04%) Land $235,887 Building $362,145 |
| 2023 | $6,519.00 (+2.08%) | $574,812 Land $226,728 Building $348,084 |
| 2022 | $6,386.00 |
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 1 (1982) |
| Most Recent Claim | Dec 1982 · tidal / storm surge |
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 77% of the US · above 54% of California |
|---|---|
| Wildfire Likelihood | 0.5% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 107 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 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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