Nassau County and Oyster Bay Town property records for 8 addresses on Helen St, Greenvale, NY · Last verified October 2026
| Properties | 8 |
|---|---|
| Median Sale Price | $645,000 |
| Deeds and Mortgages on File | 15 |
| Median Price per Sqft | $289 |
| Owner Occupied | 100% |
| Median Annual Tax Bill | $16,916 |
| Median Year Built | 1950 |
| Median Ownership Tenure | 12 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
1 Helen St |
2.5 ba · 3,160 sqft built 2004 · 0.282 acres | $450,000 Mar 2004 | $18,548 2025 | Assessor + 6 Documents Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
3 Helen St |
4 bd · 3.5 ba · 2,641 sqft built 1950 · 0.316 acres | $605,000 Mar 2014 | $17,626 2025 | Assessor + 1 Document Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
4 Helen St |
1 ba · 1,598 sqft built 1951 · 0.204 acres | $11,045 2025 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
5 Helen St |
3 bd · 2 ba · 2,231 sqft built 1950 · 0.289 acres | $645,000 Sep 2014 | $17,342 2025 | Assessor + 2 Documents Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
6 Helen St |
4 bd · 2 ba · 1,924 sqft built 1948 · 0.255 acres | $1,175,000 Jul 2022 | $14,763 2025 | Assessor + 2 Documents Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
7 Helen St |
2.5 ba · 2,654 sqft built 1950 · 0.318 acres | $850,000 Sep 2016 | $16,916 2025 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
8 Helen St |
2 ba · 2,080 sqft built 1948 · 0.255 acres | $735,000 Aug 2020 | $13,745 2025 | Assessor + 1 Document Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10 Helen St |
3 ba · 2,107 sqft built 1952 · 0.275 acres | $535,000 Nov 2000 | $14,763 2025 | Assessor + 3 Documents Updated Jun 2026 | 2 Owners on File Owner Occupied |