Suffolk County and Brookhaven Town property records for 17 addresses on William Ln, Mount Sinai, NY · Last verified September 2026
| Properties | 17 |
|---|---|
| Median Sale Price | $679,000 |
| Deeds and Mortgages on File | 16 |
| Median Price per Sqft | $288 |
| Owner Occupied | 76% |
| Median Annual Tax Bill | $5,972 |
| Median Year Built | 2002 |
| Median Ownership Tenure | 7 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 3 ba · 2,331 sqft · built 2002 · 0.051 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $627,000Apr 2023 | $4,2962024 | Amount on Record Sep 2006 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 3 ba · 2,331 sqft · built 2001 · 0.052 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $755,000Dec 2024 | $6,1322024 | Amount on Record Jan 2007 | Owner on Record | AssessorUpdated Aug 2026 |
2 bd · 2 ba · 1,441 sqft · built 2002 · 0.046 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $259,990Apr 2002 | $2,5842024 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Sep 2026 |
2 bd · 2 ba · 1,294 sqft · built 2003 · 0.045 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $360,000Feb 2004 | $5,0642024 | 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 2 ba · 1,627 sqft · built 2002 · 0.046 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $385,000Feb 2020 | $5,9722024 | Amount on Record Dec 2016 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2 bd · 2 ba · 1,627 sqft · built 2003 · 0.045 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $345,000Mar 2019 | $5,7622024 | Amount on Record Sep 2004 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2 bd · 2 ba · 1,441 sqft · built 2002 · 0.046 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $435,000Dec 2005 | $1,5212024 | Amount on Record May 2002 | 2 Owners on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 3 ba · 2,043 sqft · built 2003 · 0.042 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $679,000Dec 2021 | $7,7132024 | —Jan 2019 | 2 Owners on Record Owner Occupied | Assessor + 3 DocumentsUpdated Sep 2026 |
3 bd · 2 ba · 1,627 sqft · built 2002 · 0.046 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $420,000Jan 2021 | $5,7622024 | Amount on Record May 2002 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 3 ba · 2,706 sqft · built 2002 · 0.05 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $554,000Sep 2011 | $2,0812024 | Amount on Record Dec 2003 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
3 bd · 3 ba · 2,205 sqft · built 2002 · 0.05 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $535,000Dec 2020 | $8,0252024 | Amount on Record May 2002 | Owner on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 3 ba · 2,706 sqft · built 2002 · 0.051 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $490,000Apr 2004 | $10,8902024 | Owner on Record Owner Occupied | AssessorUpdated Aug 2026 |
2 bd · 2 ba · 1,529 sqft · built 2002 · 0.041 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $739,000Aug 2026 | $4,4522024 | Amount on Record Sep 2002 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Sep 2026 |
2 bd · 2 ba · 1,529 sqft · built 2002 · 0.042 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $345,000Sep 2015 | $7,2432024 | Amount on Record Jun 2012 | Owner on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
3 bd · 3 ba · 2,043 sqft · built 2002 · 0.041 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $400,000Dec 2002 | $7,1432024 | 2 Owners on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2 bd · 2 ba · 1,725 sqft · built 2002 · 0.05 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $820,000Oct 2024 | $7,9282024 | Amount on Record Aug 2021 | 2 Owners on Record | Assessor + 2 DocumentsUpdated Aug 2026 |
3 bd · 3 ba · 2,706 sqft · built 2002 · 0.051 acres
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $780,000Mar 2024 | $9,6132024 | Amount on Record Jan 2003 | 2 Owners on Record | Assessor + 1 DocumentUpdated Aug 2026 |