Contra Costa County property records for 22 addresses on Mason Cir, Concord, CA · Last verified July 2026
| Properties | 22 |
|---|---|
| Median Sale Price | $6,400,000 |
| Deeds and Mortgages on File | 23 |
| Median Price per Sqft | $223 |
| Owner Occupied | 18% |
| Median Annual Tax Bill | $36,134 |
| Median Year Built | 1985 |
| Median Ownership Tenure | 15 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
22,696 sqft · Built 1996 · 1.61 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $29,1282025 | —Dec 2012 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
35,000 sqft · Built 1975 · 1.72 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,920,000Jan 1996 | $62,0592025 | —May 2006 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
23,195 sqft · Built 1996 · 1.48 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jan 1996 | $43,4032025 | —Dec 2012 | 1 Name on Record | AssessorUpdated Jul 2026 |
30,000 sqft · Built 1977 · 1.6 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $28,774,000Dec 2011 | $52,2552025 | —May 1999 | 1 Name on Record | Assessor + 1 DocumentUpdated Jul 2026 |
39,200 sqft · Built 1978 · 1.75 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $965,000Jan 1994 | $35,4162025 | —Jun 1995 | 1 Name on Record | AssessorUpdated Jul 2026 |
35,000 sqft · Built 1976 · 1.8 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $28,774,000Dec 2011 | $57,0662025 | —May 1999 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
14,100 sqft · Built 1985 · 1.22 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jan 2007 | $31,9112025 | —May 2005 | 1 Name on Record | AssessorUpdated Jul 2026 |
27,748 sqft · Built 1984 · 1.75 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5,000,000Aug 2019 | $72,8382025 | Amount on Record Apr 2015 | 1 Name on Record | Assessor + 4 DocumentsUpdated Jul 2026 |
26,642 sqft · Built 1987 · 1.43 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $391,500Dec 1985 | $29,8122025 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
28,998 sqft · Built 1985 · 2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $28,774,000Dec 2011 | $84,9232025 | —May 1999 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
15,339 sqft · Built 1989 · 2.45 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Apr 2025 | $752025 | 1 Name on Record | AssessorUpdated Jul 2026 |
9,900 sqft · Built 1989 · 1.17 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $373,500Apr 1988 | $22,5872025 | —Aug 2014 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
10,304 sqft · Built 1987 · 0.879 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $15,0922025 | 1 Name on Record | AssessorUpdated Jul 2026 |
14,633 sqft · Built 1985 · 1.03 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,835,500Feb 2012 | $33,2212025 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
1 ba · 15,083 sqft · 0.959 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $2,327,000Aug 2016 | $31,4322025 | Amount on Record Mar 2000 | 1 Name on Record | AssessorUpdated Jul 2026 |
30,200 sqft · Built 1986 · 2.32 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $62,068,000Jul 2025 | $61,3752025 | Amount on Record Dec 2011 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
13,070 sqft · Built 1985 · 1.76 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $900,000Jan 2015 | $36,1342025 | Amount on Record Nov 2011 | 2 Names on Record | Assessor + 3 DocumentsUpdated Jul 2026 |
12,600 sqft · Built 1984 · 1.53 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $200,000Feb 1998 | $28,0012025 | —Feb 2017 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
28,602 sqft · Built 1985 · 1.63 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6,400,000May 2026 | $67,8312025 | —Aug 2008 | 1 Name on Record | Assessor + 1 DocumentUpdated Jul 2026 |
13,440 sqft · Built 1984 · 2.93 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $904,500Jun 2004 | $36,8542025 | Amount on Record Dec 2000 | 1 Name on Record | Assessor + 2 DocumentsUpdated Jul 2026 |
18,000 sqft · Built 1985 · 1.52 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,925,000Oct 1999 | —Oct 1999 | 1 Name on Record | AssessorUpdated Jul 2026 |
14,019 sqft · Built 1986 · 1.37 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Jul 1999 | —Jul 1999 | 1 Name on Record | AssessorUpdated Jul 2026 |