Contra Costa County property record for 4142 Mt Isabel Rd, Antioch, CA 94531
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,085 sqft · built 2001 |
| Lot Size | 0.13 acres (5,645 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $205,000 (Dec 2011) |
| Tax Bill | $3,418 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 055-650-048-6 |
| Primary APN | 055-650-048-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,085 sqft Living Area |
| 1st Floor Area | 1,102 sqft |
| 2nd Floor Area | 983 sqft |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2001 |
| Lot Area | 5,645 sqft (0.13 acres) |
| Garage Type | Attached |
| Garage Area | 472 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 4142 MOUNT ISABEL RD |
|---|---|
| City | ANTIOCH |
| State | CA |
| Zip | 94531-9106 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A-2 |
| Legal Description | T8410 L123 |
| Legal Tract | 8410 |
| Legal Lot Number | 123 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | TASSAJARA |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 355118 |
4142 Mt Isabel Rd is owned by two individuals who acquired it in June 2014.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 42285 CAMINO SANTA BARBARA, FREMONT, CA 94539-4707 |
| Owner Type | Individual |
| Vesting | Joint Tenants |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 30, 2011 · Amount on File |
| Deed Sale | Dec 30, 2011 · Amount on File |
| Prior Sale | Jul 28, 2003 · Amount on File |
| Deed Document Number | 2011286129 |
| Last Transfer Date | Jun 14, 2014 |
| Transfer Doc | 0022624621 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 4142 Mt Isabel Rd was $3,418.
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 | $262,628 (+2%) Land $64,051 Building $198,577 | |
| 2025 | $3,418.00 | $257,480 Land $62,796 Building $194,684 |
| 2023 | $3,210.00 (+1.39%) | $247,483 Land $60,358 Building $187,125 |
| 2022 | $3,166.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4142 Mt Isabel Rd 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 4142 Mt Isabel Rd is low, with a 0.04% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.04% 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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures