Contra Costa County property record for 4146 Mt Isabel Rd, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,319 sqft · built 2001 |
| Lot Size | 0.128 acres (5,580 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $509,500 (Feb 2007) |
| Tax Bill | $8,108 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 055-650-049-4 |
| Primary APN | 055-650-049-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 2,319 sqft Living Area |
| 1st Floor Area | 1,075 sqft |
| 2nd Floor Area | 1,244 sqft |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2001 |
| Lot Area | 5,580 sqft (0.128 acres) |
| Garage Type | Attached |
| Garage Area | 514 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 4146 MOUNT ISABEL RD |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-9106 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8410 L124 |
| Legal Tract | 8410 |
| Legal Lot Number | 124 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 355118 |
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 | 4146 MOUNT ISABEL RD, ANTIOCH, CA 94531-9106 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 7, 2007 · Amount on Record |
| Deed Sale | Feb 7, 2007 · Amount on Record |
| Prior Sale | Nov 29, 2001 · Amount on Record |
| Deed Document Number | 200737830 |
| Prior Transfer Date | Feb 1, 2007 |
| Prior Transfer Doc | 0000037831 |
| Record Updated | Sep 20, 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 | $718,103 (+2%) Land $314,307 Building $403,796 | |
| 2025 | $8,108.00 (+5.97%) | $704,024 (+4.04%) Land $308,145 Building $395,879 |
| 2023 | $7,651.00 (+1.61%) | $676,687 Land $296,180 Building $380,507 |
| 2022 | $7,530.00 |
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 44% of the US · lower than 74% of California |
|---|---|
| Wildfire Likelihood | 0.09% annual chance |
| Exposure | Indirect within 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 | 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 675 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Unwired.
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