Suffolk County and Islip Town property records for 20 addresses on Bertram St, Islip, NY · Last verified August 2026
| Properties | 20 |
|---|---|
| Median Sale Price | $350,000 |
| Deeds and Mortgages on File | 16 |
| Median Price per Sqft | $415 |
| Owner Occupied | 95% |
| Median Annual Tax Bill | $11,646 |
| Median Year Built | 1959 |
| Median Ownership Tenure | 15 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
1,000 sqft · Built 1959 · 0.219 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $690,000Jul 2025 | $11,1632024 | Amount on Record Oct 2019 | 1 Name on Record | Assessor + 1 DocumentUpdated Aug 2026 |
1,866 sqft · Built 1960 · 0.21 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $227,000Jul 2001 | Amount on Record Nov 2000 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $412,000Apr 2007 | Amount on Record May 1999 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
1,300 sqft · Built 1959 · 0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $360,000Aug 2006 | $11,6462024 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $387,000Jul 2005 | Amount on Record Feb 1998 | 1 Name on Record Owner Occupied | AssessorUpdated May 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $310,000Nov 2010 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
1,418 sqft · Built 1959 · 0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $300,000Oct 2016 | $12,6742024 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $280,000Apr 2011 | 2 Names on Record Owner Occupied | AssessorUpdated Jul 2026 |
1,942 sqft · Built 1959 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $680,000Aug 2023 | $13,0852024 | Amount on Record Feb 2000 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Aug 2026 |
1,000 sqft · Built 1958 · 0.169 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $415,000Nov 2020 | $10,5972024 | Amount on Record Sep 1993 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 1 Name on Record Owner Occupied | AssessorUpdated May 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Names on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $288,625Aug 2016 | $10,6602024 | 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Names on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $11,3782024 | 2 Names on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $265,000Oct 2009 | $14,0272024 | 2 Names on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.25 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 1 Name on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $350,000Aug 2011 | $13,1772024 | Amount on Record Mar 2004 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach of burnable land |