Contra Costa County property records for 47 addresses on Union Mine Dr, Antioch, CA · Last verified July 2026
| Properties | 47 |
|---|---|
| Median Sale Price | $832,500 |
| Deeds and Mortgages on File | 85 |
| Median Price per Sqft | $271 |
| Owner Occupied | 83% |
| Median Annual Tax Bill | $7,600 |
| Median Year Built | 1997 |
| Median Ownership Tenure | 16 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
5 bd · 3 ba · 2,819 sqft · built 1997 · 0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $277,500Jun 2011 | $4,4472025 | Amount on Record Mar 2011 | 2 Names on Record | AssessorUpdated Jul 2026 |
4 bd · 3 ba · 3,131 sqft · built 1997 · 0.217 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $405,000Jul 2008 | $6,1892025 | Amount on Record May 2008 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.203 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $535,000Feb 2004 | $8,9242025 | Amount on Record Apr 2000 | 1 Name on Record | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $435,000Oct 2000 | $7,7252025 | Amount on Record Dec 1997 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 3,859 sqft · built 1997 · 0.207 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $925,000May 2022 | $11,0202025 | Amount on Record Jun 2020 | 1 Name on Record | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 3,131 sqft · built 1997 · 0.199 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $300,000Dec 2011 | $4,6702025 | Amount on Record Aug 1997 | 2 Names on Record | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $525,000Sep 2003 | $8,9202025 | Amount on Record Oct 1997 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
6 bd · 4 ba · 3,859 sqft · built 1997 · 0.238 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $617,000Sep 2017 | $8,0842025 | Amount on Record Oct 2008 | 2 Names on Record | Assessor + 3 DocumentsUpdated Jul 2026 |
6 bd · 3 ba · 3,715 sqft · built 1997 · 0.196 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $950,000Mar 2022 | $10,6672025 | Amount on Record Dec 2019 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 2,740 sqft · built 1997 · 0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $750,000Mar 2023 | $8,9062025 | Amount on Record May 2005 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.201 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $800,000Aug 2021 | $9,2712025 | Amount on Record Sep 2009 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.186 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $294,000Jun 1998 | $5,8112025 | —Jun 1998 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
6 bd · 3 ba · 3,859 sqft · built 1997 · 0.206 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $295,000Oct 2018 | $7,8572025 | Amount on Record Sep 2012 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.195 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $640,000Mar 2019 | $8,2062025 | Amount on Record Jul 2018 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 2,819 sqft · built 1997 · 0.204 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $608,000Nov 2006 | $6,5762025 | Amount on Record Sep 1999 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 2,819 sqft · built 1997 · 0.186 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $257,000Dec 1997 | $5,2462025 | —Mar 2002 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
3 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $260,000Nov 2009 | $4,2382025 | Amount on Record Jun 2009 | 2 Names on Record | AssessorUpdated Jul 2026 |
4 bd · 3 ba · 2,819 sqft · built 1997 · 0.196 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $390,000Jun 2013 | $5,7562025 | Amount on Record Sep 2007 | 1 Name on Record | Assessor + 1 DocumentUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.22 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $832,500Oct 2025 | $7,3302025 | Amount on Record May 2019 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.196 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $810,000Aug 2021 | $8,8092025 | Amount on Record Mar 2008 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.214 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $571,000May 2018 | $7,5342025 | Amount on Record Mar 1998 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 2,819 sqft · built 1997 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $263,500May 1998 | $5,2872025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.217 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $325,500May 1998 | $6,2522025 | —May 1998 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.213 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $359,000Mar 2000 | $6,9522025 | Amount on Record Jul 1998 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
6 bd · 2.5 ba · 3,859 sqft · built 1997 · 0.23 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $340,000Jun 1998 | $7,0092025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
4 bd · 2.5 ba · 2,467 sqft · built 1997 · 0.265 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $800,000Feb 2025 | $9,1132025 | Amount on Record May 1998 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.421 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $440,000Aug 2002 | $8,1072025 | Amount on Record Jul 1998 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3.5 ba · 4,245 sqft · built 1997 · 0.39 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $800,000Apr 2004 | $11,2122025 | Amount on Record Aug 1998 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,715 sqft · built 1997 · 0.268 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $555,000Nov 2016 | $7,4022025 | Amount on Record Mar 2015 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
5 bd · 3 ba · 3,131 sqft · built 1997 · 0.327 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $364,000Sep 2010 | $5,9762025 | Amount on Record Jun 2010 | 1 Name on Record Owner Occupied | Assessor + 7 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 3,503 sqft · built 2001 · 0.202 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $926,000Nov 2023 | $10,6312025 | Amount on Record May 2023 | 2 Names on Record Owner Occupied | Assessor + 7 DocumentsUpdated Jul 2026 |
5 bd · 4 ba · 3,727 sqft · built 2001 · 0.381 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $461,000Mar 2002 | $8,1502025 | —Feb 2017 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
5 bd · 4.5 ba · 3,691 sqft · built 2001 · 0.211 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $375,000Jul 2012 | $5,3802025 | Amount on Record Jan 2012 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 3,503 sqft · built 2001 · 0.291 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $950,000May 2025 | $7,8922025 | Amount on Record Feb 2016 | 1 Name on Record | Assessor + 4 DocumentsUpdated Jul 2026 |
4 bd · 3.5 ba · 2,719 sqft · built 2001 · 0.219 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $359,000Jun 2010 | $5,5822025 | Amount on Record Jun 2010 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
6 bd · 4.5 ba · 3,888 sqft · built 2001 · 0.252 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $462,000Mar 2002 | $8,0662025 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,383 sqft · built 2001 · 0.203 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $123,000Aug 2015 | $5,3142025 | Amount on Record Mar 2009 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 3.5 ba · 3,727 sqft · built 2001 · 0.223 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $535,000Dec 2002 | $9,0342025 | Amount on Record Mar 2002 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
6 bd · 4.5 ba · 3,888 sqft · built 2001 · 0.221 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $537,500Apr 2002 | $9,9562025 | —Oct 2002 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
4 bd · 3 ba · 3,503 sqft · built 2001 · 0.221 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $375,000Feb 2009 | $5,7872025 | Amount on Record May 2008 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 3.5 ba · 3,727 sqft · built 2001 · 0.222 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $550,000Aug 2017 | $7,3602025 | Amount on Record Feb 2009 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 3.5 ba · 3,727 sqft · built 2001 · 0.649 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $470,000May 2002 | $8,2072025 | —May 2002 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
5 bd · 3 ba · 3,383 sqft · built 2001 · 0.218 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $354,000Oct 2010 | $5,4792025 | Amount on Record Jul 2010 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
6 bd · 4.5 ba · 3,888 sqft · built 2001 · 0.211 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $810,000Feb 2005 | $10,9662025 | Amount on Record May 2002 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
4 bd · 3.5 ba · 3,727 sqft · built 2001 · 0.211 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $565,000Sep 2019 | $7,4082025 | Amount on Record May 2002 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jul 2026 |
4 bd · 3 ba · 3,503 sqft · built 2001 · 0.211 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $488,000May 2002 | $7,6002025 | Amount on Record May 2002 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
6 bd · 4.5 ba · 3,888 sqft · built 2001 · 0.218 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $488,000May 2002 | $9,2432025 | —Jan 2007 | 1 Name on Record Owner Occupied | AssessorUpdated 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 62% of the US · above 39% of California |
|---|---|
| Wildfire Likelihood | About 1 in 399 per year |
| Exposure | Indirect 0 of 4 cells directly exposed · 3 adjoin burnable vegetation |