Contra Costa County property records for 15 addresses on Williamson Ct, Martinez, CA · Last verified August 2026
| Properties | 15 |
|---|---|
| Median Sale Price | $820,000 |
| Deeds and Mortgages on File | 30 |
| Median Price per Sqft | $353 |
| Owner Occupied | 87% |
| Median Annual Tax Bill | $7,463 |
| Median Year Built | 1996 |
| Median Ownership Tenure | 20 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 2 ba · 1,660 sqft · 0.137 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $428,000Oct 2003 | $8,4532025 | Amount on Record Apr 1995 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
3 bd · 2 ba · 1,726 sqft · 0.133 acres · Garage · Pool
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $200,500May 1998 | $5,6762025 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 1,856 sqft · 0.114 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $820,000Mar 2025 | $5,4372025 | Amount on Record Apr 1998 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 2.5 ba · 1,943 sqft · 0.096 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $277,500Dec 1999 | $6,4042025 | Amount on Record Oct 1998 | 2 Names on Record | Assessor + 4 DocumentsUpdated Aug 2026 |
3 bd · 2 ba · 1,706 sqft · 0.172 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $396,500Jun 2008 | $7,4632025 | Amount on Record Mar 2008 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 2.5 ba · 1,943 sqft · 0.133 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $390,000May 2001 | $8,2162025 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
3 bd · 2.5 ba · 1,821 sqft · 0.126 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $275,000Jan 2000 | $6,3612025 | Amount on Record Aug 1996 | 1 Name on Record | AssessorUpdated Jul 2026 |
3 bd · 2.5 ba · 1,744 sqft · 0.165 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $617,000Jun 2006 | $11,0042025 | Amount on Record Mar 1998 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 1,943 sqft · 0.11 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $200,000Apr 1996 | $5,3202025 | —Apr 1996 | 1 Name on Record Owner Occupied | AssessorUpdated Jul 2026 |
3 bd · 2.5 ba · 1,744 sqft · 0.142 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $285,000Apr 2013 | $5,7282025 | —Jan 2011 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 2.5 ba · 1,995 sqft · 0.098 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $885,000Mar 2022 | $12,0702025 | Amount on Record May 1996 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
4 bd · 2.5 ba · 1,943 sqft · 0.119 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $860,000Jul 2025 | $7,2292025 | Amount on Record Mar 2000 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jul 2026 |
5 bd · 3.5 ba · 2,271 sqft · 0.183 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $465,000Apr 2008 | $10,1512025 | Amount on Record Aug 2005 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
4 bd · 2.5 ba · 1,856 sqft · 0.105 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $550,000Jun 2004 | $10,3862025 | Amount on Record Jul 2001 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jul 2026 |
5 bd · 3.5 ba · 2,559 sqft · 0.215 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $850,000Nov 2018 | $13,1932025 | —May 2013 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |