Suffolk County and Islip Town property records for 54 addresses on Boulder St, Ronkonkoma, NY · Last verified October 2026
| Properties | 54 |
|---|---|
| Median Sale Price | $515,000 |
| Deeds and Mortgages on File | 61 |
| Median Price per Sqft | $300 |
| Owner Occupied | 87% |
| Median Annual Tax Bill | $10,696 |
| Median Year Built | 1971 |
| Median Ownership Tenure | 10 years |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $8,3052024 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $390,000Mar 2007 | $10,2592024 | Amount on Record May 1997 | 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Sep 2011 | $10,9152024 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $460,000Dec 2005 | $11,9292024 | Amount on Record Jul 1994 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Mar 2011 | Amount on Record Apr 2002 | Owner on Record Owner Occupied | AssessorUpdated Oct 2026 |
0.139 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $340,000Sep 2015 | $12,0702024 | Amount on Record Oct 1997 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
1,750 sqft · built 1971 · 0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $435,000Sep 2018 | $12,8922024 | Amount on Record Mar 1999 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
1,842 sqft · built 1970 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $455,000May 2021 | Amount on Record Jul 2014 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Oct 2026 |
0.25 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $10,5602024 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.269 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $600,000Aug 2023 | Amount on Record Aug 2014 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
1,166 sqft · built 1940 · 0.25 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Nov 2018 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
0.33 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $385,000Sep 2008 | Owner on Record Owner Occupied | AssessorUpdated Oct 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $300,000Jan 2015 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.219 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $204,000Mar 2013 | $7,8232024 | Owner on Record Owner Occupied | AssessorUpdated Oct 2026 |
1,928 sqft · built 1972 · 0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $110,000Mar 1998 | $11,7412024 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.089 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $107,000Jan 1998 | $1,9632024 | Amount on Record May 1995 | 2 Owners on Record Owner Occupied | AssessorUpdated Oct 2026 |
0.21 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $625,000Dec 2022 | $9,6832024 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $390,000Oct 2016 | Amount on Record Sep 1997 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Sep 2026 |
1,530 sqft · built 1965 · 0.33 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $141,000Sep 1998 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
0.1 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $12,0702024 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
1,749 sqft · built 1987 · 0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $410,000Oct 2005 | $11,9072024 | Amount on Record Mar 2005 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.219 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $7,502Aug 2004 | Amount on Record Mar 2002 | Owner on Record Owner Occupied | AssessorUpdated Oct 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $121,000Jul 1994 | $8,7792024 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.269 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $485,000Aug 2007 | 2 Owners on Record Owner Occupied | AssessorUpdated Oct 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $302,000Feb 2017 | Amount on Record May 2013 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Oct 2026 |
1,578 sqft · built 1972 · 0.269 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $432,500Dec 2019 | $11,9292024 | Amount on Record Aug 2013 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
1,326 sqft · built 1940 · 0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $459,000Feb 2024 | $8,1202024 | Amount on Record Jun 2018 | 2 Owners on Record | Assessor + 5 DocumentsUpdated Aug 2026 |
0.219 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
1,633 sqft · built 1967 · 0.25 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $338,500Jun 2017 | $12,2032024 | Amount on Record May 2010 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2,318 sqft · built 1971 · 0.319 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $415,000Dec 2020 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.269 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $515,000Feb 2025 | Owner on Record | Assessor + 1 DocumentUpdated Aug 2026 |
2,104 sqft · built 1984 · 0.35 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $470,000Aug 2018 | $13,0802024 | Amount on Record Oct 2016 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2,027 sqft · built 1973 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $400,000Sep 2017 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.15 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $315,000Oct 2015 | $10,7002024 | Amount on Record Oct 2005 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record | AssessorUpdated Aug 2026 |
0.26 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| 2 Owners on Record | Assessor + 1 DocumentUpdated Aug 2026 |
0.2 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $418,000Jan 2006 | $10,8342024 | Amount on Record Jul 1997 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $205,000Feb 2001 | $9,8342024 | Amount on Record Apr 1998 | 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
1,900 sqft · built 1950 · 0.289 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $185,985Jun 2023 | $10,3432024 | Amount on Record Jan 2020 | Owner on Record Owner Occupied | Assessor + 6 DocumentsUpdated Sep 2026 |
0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $1,000Jun 2001 | $10,6962024 | Owner on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
0.369 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $595,000Aug 2025 | Amount on Record Dec 2023 | 2 Owners on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
1,746 sqft · built 1969 · 0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $525,000Jul 2021 | $10,9932024 | Amount on Record Jan 2021 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $535,000Mar 2024 | $9,8872024 | Owner on Record | Assessor + 1 DocumentUpdated Aug 2026 |
0.169 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $285,000Sep 2014 | $9,7502024 | Amount on Record Aug 2011 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $174,689Feb 2023 | $9,1082024 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.189 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record | AssessorUpdated Aug 2026 |
1,904 sqft · built 1973 · 0.16 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $610,000Dec 2024 | $12,6182024 | Amount on Record Dec 2016 | 2 Owners on Record | Assessor + 1 DocumentUpdated Aug 2026 |
2,300 sqft · built 1941 · 0.18 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,500Jan 1994 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
0.269 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
1,524 sqft · built 1974 · 0.13 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $285,000Oct 2019 | $10,0662024 | Amount on Record Nov 2003 | Owner on Record Owner Occupied | Assessor + 3 DocumentsUpdated Aug 2026 |
0.21 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $430,000Aug 2023 | $7,9002024 | Amount on Record Aug 2016 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |