Contra Costa County property records for 9 addresses on Union Mine Ct, Antioch, CA · Last verified July 2026
| Properties | 9 |
|---|---|
| Median Sale Price | $545,000 |
| Deeds and Mortgages on File | 14 |
| Median Price per Sqft | $169 |
| Owner Occupied | 78% |
| Median Annual Tax Bill | $6,842 |
| Median Year Built | 1997 |
| Median Ownership Tenure | 18 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
4 bd · 3 ba · 3,131 sqft · built 1998 · 0.238 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $335,000Dec 2008 | $4,9962025 | Amount on Record Sep 2008 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
6 bd · 3 ba · 3,859 sqft · built 1997 · 0.227 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $359,000Sep 1998 | $6,8422025 | —Aug 2003 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.212 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $545,000Mar 2004 | $8,9092025 | Amount on Record Sep 1998 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1996 · 0.272 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $275,000Apr 2009 | $4,3882025 | Amount on Record Jun 2008 | 1 Name on Record | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 3 ba · 2,740 sqft · built 1996 · 0.248 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $310,000Oct 1998 | $5,9212025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1996 · 0.352 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,050,000Nov 2021 | $9,7512025 | Amount on Record Jan 2019 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 3 ba · 3,253 sqft · built 1998 · 0.232 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $440,000Jan 2008 | $7,0892025 | Amount on Record Mar 2007 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.207 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $700,000Jul 2025 | $5,1592025 | Amount on Record Sep 1998 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.214 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $630,000Jun 2004 | $7,2392025 | Amount on Record Mar 2003 | 1 Name on Record | Assessor + 3 DocumentsUpdated Jul 2026 |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020
| Wildfire Risk | Moderate this street's cells rank above 51% of the US · above 30% of California |
|---|---|
| Wildfire Likelihood | About 1 in 709 per year |
| Exposure | Indirect 0 of 1 cells directly exposed · 1 adjoin burnable vegetation |