Contra Costa County property records for 4 units in 4800 Blum Rd, Martinez, CA · Last verified October 2026
| Properties | 4 |
|---|---|
| Median Sale Price | $231,000 |
| Deeds and Mortgages on File | 9 |
| Median Price per Sqft | $302 |
| Owner Occupied | 25% |
| Median Annual Tax Bill | $3,912 |
| Median Year Built | 1973 |
| Median Ownership Tenure | 6 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4800, Apt 1 Blum Rd |
2 bd · 1 ba · 763 sqft built 1973 · 0.137 acres | $225,000 Dec 2020 | $67 2025 | Assessor + 4 Documents Updated Oct 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4800, Apt 2 Blum Rd |
2 bd · 1 ba · 763 sqft built 1973 · 0.017 acres | $52,000 Nov 2011 | $1,846 2025 | Assessor + 3 Documents Updated Sep 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4800, Apt 3 Blum Rd |
2 bd · 1 ba · 763 sqft built 1973 · 0.018 acres | $231,000 May 2020 | $3,912 2025 | Assessor + 1 Document Updated Oct 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4800, Apt 4 Blum Rd |
2 bd · 1 ba · 763 sqft built 1973 · 0.018 acres | $257,500 Jan 2018 | $4,357 2025 | Assessor + 1 Document Updated Oct 2026 | Owner on File Owner Occupied |