Contra Costa County property record for 100 Diego Ct, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,512 sqft · built 2021 |
| Lot Size | 0.112 acres (4,879 sqft) |
| Owner | Trust Name on File |
| Last Sale | $739,000 (Mar 2022) |
| Tax Bill | $12,035 (2025) |
| Deeds & Mortgages | Oct 2023 Transfer Mar 2022 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 037-610-050-9 |
| Primary APN | 037-610-050-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,512 sqft Living Area |
| 1st Floor Area | 1,037 sqft |
| 2nd Floor Area | 1,475 sqft |
| Year Built | Built 2021 |
|---|---|
| Effective Year Built | Effective 2022 |
| Lot Area | 4,879 sqft (0.112 acres) |
| Garage Type | Attached |
| Garage Area | 463 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 100 DIEGO CT |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-6035 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T9503 L50 |
| Legal Subdivision | ALICANTE SUB 9503 |
| Legal Tract | 9503 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 302005 |
100 Diego Ct is owner-occupied and held in a trust since October 2023.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 100 DIEGO CT, OAKLEY, CA 94561-6035 |
| 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.
| Date | Document |
|---|---|
| Oct 13, 2023 | Intrafamily Transfer, Transfer |
| Mar 18, 2022 | Grant Deed, Subdivision Related Transfer · Conventional Mortgage LOANDEPOT.COM LLC |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 18, 2022 · Amount on File |
| Deed Sale | Mar 18, 2022 · Amount on File |
| Deed Document Number | 202248574 |
| Last Transfer Date | Oct 12, 2023 |
| Transfer Doc | 0000100672 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Oct 13, 2023 |
| Property Address | 100 DIEGO CT, OAKLEY, CA 94561-6035 |
| Document Number | 0000100672 |
| Map Reference | MB 543 PG 11-21 |
| Instrument Date | Oct 12, 2023 |
| Instrument | 2023-100672 |
| Transaction Type | Transfer |
| Record Updated | Oct 24, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 100 DIEGO CT, OAKLEY, CA 94561-6035 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Mar 18, 2022 |
| Property Address | 100 DIEGO CT, OAKLEY, CA 94561-6035 |
| Document Number | 0000048574 |
| Map Reference | MB 543 PG 11-21 |
| Instrument Date | Feb 21, 2022 |
| Instrument | 2022-048574 |
| Transaction Type | Subdivision Related Transfer |
| Record Updated | Aug 1, 2023 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 100 DIEGO CT, OAKLEY, CA 94561-6035 |
| Document Number | 0000048575 |
|---|---|
| Date | Mar 18, 2022 |
| Instrument | 2022-048575 |
| Name | LOANDEPOT.COM LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Apr 1, 2052 |
The 2025 property tax bill for 100 Diego Ct was $12,035 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 | Oakley City |
| Unified School District | Antioch Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $799,482 (+2%) Land $346,377 Building $453,105 | |
| 2025 | $12,035.00 Homeowner's exemption | $783,807 Land $339,586 Building $444,221 |
| 2023 | $11,531.00 (+88.94%) Homeowner's exemption | $753,372 Land $326,400 Building $426,972 |
| 2022 | $6,103.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 100 Diego Ct 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 100 Diego Ct is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 | DIABLO WATER DISTRICT serves 47,158 people · EPA ID CA0710007 |
|---|---|
| Water Source | Purchased surface water from RANDALL-BOLD WATER TREATMENT PLANT |
| Last State Inspection | Jan 2024 |
| Also Mapped Here | CONTRA COSTA WATER DISTRICT |
| Lead | 2 ppb (2020–2022) 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 622 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 |
| AT&T DSL | 100 / 20 |
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