Contra Costa County property record for 1866 Foster Mountain Ct, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,650 sqft · built 2001 |
| Lot Size | 0.258 acres (11,241 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $371,000 (Mar 2001) |
| Tax Bill | $6,707 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 055-640-026-5 |
| Primary APN | 055-640-026-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 2,650 sqft Living Area |
| 1st Floor Area | 1,395 sqft |
| 2nd Floor Area | 1,255 sqft |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2001 |
| Lot Area | 11,241 sqft (0.258 acres) |
| Garage Type | Attached |
| Garage Area | 6,402 sqft |
| Parking Spaces | 21 Parking Spaces |
| Street Address | 1866 FOSTER MOUNTAIN CT |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-9076 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8325 L745 |
| Legal Tract | 8325 |
| Legal Lot Number | 745 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 2 |
| Census Block | 2003 |
| Census Tract | 355119 |
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 | Individual Name on Record |
|---|---|
| Mailing Address | 1866 FOSTER MOUNTAIN CT, ANTIOCH, CA 94531-9076 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 16, 2001 · Amount on Record |
| Deed Sale | Mar 16, 2001 · Amount on Record |
| Deed Document Number | 200162705 |
| Last Transfer Date | Oct 31, 2003 |
| Transfer Doc | 0000556201 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Antioch City |
| Unified School District | Antioch Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $586,639 (+2%) Land $153,300 Building $433,339 | |
| 2025 | $6,707.00 (+6.09%) | $575,138 (+4.04%) Land $150,295 Building $424,843 |
| 2023 | $6,322.00 (+1.61%) | $552,807 Land $144,460 Building $408,347 |
| 2022 | $6,222.00 |
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
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 51% of the US · lower than 69% of California |
|---|---|
| Wildfire Likelihood | 0.1% 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 | CITY OF ANTIOCH serves 116,781 people · EPA ID CA0710001 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2024 |
| Lead | Under 1 ppb (2022–2024) 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 611 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: T-Mobile, Unwired.
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