Middlesex County and South River Borough property records for 9 addresses on O'Brien Ave, South River, NJ · Last verified October 2026
| Properties | 9 |
|---|---|
| Median Sale Price | $300,000 |
| Deeds and Mortgages on File | 9 |
| Median Price per Sqft | $189 |
| Owner Occupied | 78% |
| Median Annual Tax Bill | $9,125 |
| Median Year Built | 1964 |
| Median Ownership Tenure | 14 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
1 O'Brien Ave |
1,632 sqft built 1964 · 0.172 acres | $369,000 Jun 2005 | $8,979 2025 | Assessor + 1 Document Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
2 O'Brien Ave |
1,686 sqft built 1935 · 0.206 acres | $300,000 Dec 2016 | $9,125 2025 | Assessor + 2 Documents Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
3 O'Brien Ave |
2,090 sqft built 1962 · 0.183 acres | $515,000 Jan 2026 | $9,067 2025 | Assessor + 1 Document Updated Jul 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4 O'Brien Ave |
1,682 sqft built 1962 · 0.183 acres | $155,000 Dec 1998 | $8,613 2025 | Assessor + 2 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
5 O'Brien Ave |
1,371 sqft built 1966 · 0.179 acres | $260,000 Mar 2012 | $7,842 2025 | Assessor Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
6 O'Brien Ave |
1,682 sqft built 1961 · 0.183 acres | $279,000 Jun 2013 | Assessor + 1 Document Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
7 O'Brien Ave |
1,948 sqft built 1967 · 0.159 acres | $176,000 May 1999 | $9,173 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
8 O'Brien Ave |
1,631 sqft built 1967 · 0.192 acres | $10,073 2025 | Assessor + 2 Documents Updated Jul 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10 O'Brien Ave |
1,728 sqft built 1967 · 0.153 acres | $430,000 Oct 2006 | $9,339 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |