Suffolk County and Brookhaven Town property records for 43 addresses on William Penn Dr, Stony Brook, NY · Last verified October 2026
| Properties | 43 |
|---|---|
| Median Sale Price | $630,000 |
| Deeds and Mortgages on File | 48 |
| Median Price per Sqft | $332 |
| Owner Occupied | 81% |
| Median Annual Tax Bill | $15,640 |
| Median Year Built | 1958 |
| Median Ownership Tenure | 15 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
1 William Penn Dr |
3 bd · 2 ba · 1,769 sqft built 1955 · 0.43 acres | $679,500 Aug 2023 | $14,044 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
2 William Penn Dr |
5 bd · 3 ba · 3,163 sqft built 1970 · 0.369 acres | $255,000 Aug 1998 | $18,870 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
3 William Penn Dr |
3 bd · 2 ba · 1,722 sqft built 1955 · 0.51 acres | $10,553 2024 | Assessor Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
5 William Penn Dr |
3 bd · 2 ba · 2,815 sqft built 1955 · 0.48 acres | $550,000 Apr 2010 | $19,691 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
7 William Penn Dr |
4 bd · 3 ba · 2,998 sqft built 1953 · 0.48 acres | $293,000 Mar 1999 | $18,726 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
8 William Penn Dr |
3 bd · 2 ba · 1,356 sqft built 1960 · 0.4 acres | $15,420 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9 William Penn Dr |
4 bd · 3 ba · 1,963 sqft built 1954 · 0.539 acres | $212,500 Sep 1997 | $16,975 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10 William Penn Dr |
3 bd · 2 ba · 1,966 sqft built 1959 · 0.429 acres | Assessor Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11 William Penn Dr |
3 bd · 2 ba · 1,648 sqft built 1957 · 0.489 acres | $16,153 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
12 William Penn Dr |
3 bd · 2 ba · 1,711 sqft built 1958 · 0.43 acres | $12,949 2024 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14 William Penn Dr |
5 bd · 2 ba · 1,983 sqft built 1957 · 0.43 acres | $18,048 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
15 William Penn Dr |
3 bd · 2 ba · 2,156 sqft built 1957 · 0.439 acres | $275,000 Feb 2000 | $17,165 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
16 William Penn Dr |
3 bd · 2 ba · 1,254 sqft built 1956 · 0.43 acres | $470,000 Dec 2022 | $13,530 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
17 William Penn Dr |
3 bd · 2 ba · 1,822 sqft built 1957 · 0.389 acres | $200,000 Jun 2000 | $14,716 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
18 William Penn Dr |
5 bd · 3 ba · 3,949 sqft built 1920 · 1.46 acres | $405,000 Mar 1997 | $20,102 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
19 William Penn Dr |
4 bd · 2 ba · 1,975 sqft built 1957 · 0.389 acres | $365,000 Jul 2013 | $13,879 2024 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
21 William Penn Dr |
5 bd · 3 ba · 2,803 sqft built 1956 · 0.389 acres | $210,000 Mar 1995 | $16,564 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
22 William Penn Dr |
3 bd · 2 ba · 3,368 sqft built 1957 · 0.63 acres | $13,697 2024 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
23 William Penn Dr |
3 bd · 2 ba · 1,981 sqft built 1956 · 0.389 acres | $672,000 Sep 2023 | $18,048 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
25 William Penn Dr |
3 bd · 2 ba · 1,939 sqft built 1957 · 0.389 acres | $15,743 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
26 William Penn Dr |
4 bd · 2 ba · 1,983 sqft built 1960 · 0.75 acres | $420,000 Aug 2002 | $14,921 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
28 William Penn Dr |
3 bd · 2 ba · 1,769 sqft built 1959 · 0.61 acres | $18,253 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
29 William Penn Dr |
4 bd · 2 ba · 1,983 sqft built 1957 · 0.45 acres | $630,000 Oct 2023 | $15,584 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
31 William Penn Dr |
5 bd · 2 ba · 2,205 sqft built 1960 · 0.389 acres | $17,283 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
33 William Penn Dr |
5 bd · 2 ba · 1,983 sqft built 1957 · 0.389 acres | $660,000 Sep 2023 | $15,296 2024 | Assessor + 1 Document Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
34 William Penn Dr |
3 bd · 2 ba · 1,535 sqft built 1960 · 0.36 acres | $510,000 Sep 2017 | $12,704 2024 | Assessor + 3 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
35 William Penn Dr |
4 bd · 2 ba · 1,988 sqft built 1956 · 0.389 acres | $595,000 Dec 2006 | $18,048 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
37 William Penn Dr |
3 bd · 2 ba · 1,933 sqft built 1960 · 0.389 acres | $760,000 Aug 2022 | $14,475 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
39 William Penn Dr |
4 bd · 2 ba · 2,251 sqft built 1959 · 0.45 acres | $15,603 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
40 William Penn Dr |
3 bd · 2 ba · 2,003 sqft built 1959 · 0.429 acres | $500,000 Jun 2011 | $16,153 2024 | Assessor + 1 Document Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
41 William Penn Dr |
3 bd · 1 ba · 1,766 sqft built 1958 · 0.45 acres | $329,000 Nov 2000 | $17,227 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
43 William Penn Dr |
4 bd · 2 ba · 2,007 sqft built 1960 · 0.45 acres | $450,000 Mar 2011 | $14,059 2024 | Assessor + 1 Document Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
44 William Penn Dr |
4 bd · 2 ba · 1,983 sqft built 1959 · 0.4 acres | $605,000 May 2020 | $14,763 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
45 William Penn Dr |
3 bd · 2 ba · 1,822 sqft built 1957 · 0.45 acres | $17,021 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
46 William Penn Dr |
3 bd · 2 ba · 1,789 sqft built 1960 · 0.38 acres | $381,319 Jun 2020 | $15,337 2024 | Assessor + 1 Document Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
47 William Penn Dr |
4 bd · 2 ba · 2,007 sqft built 1960 · 0.41 acres | $547,000 Jun 2021 | $14,968 2024 | Assessor + 3 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
48 William Penn Dr |
3 bd · 2 ba · 1,735 sqft built 1960 · 0.369 acres | $574,000 Sep 2020 | $15,543 2024 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
49 William Penn Dr |
4 bd · 3 ba · 2,853 sqft built 1960 · 0.41 acres | $17,227 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
51 William Penn Dr |
3 bd · 2 ba · 2,336 sqft built 1959 · 0.4 acres | $110,000 May 2005 | $15,640 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
53 William Penn Dr |
3 bd · 2 ba · 1,655 sqft built 1959 · 0.389 acres | $950,000 Aug 2025 | $16,153 2024 | Assessor + 5 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
55 William Penn Dr |
4 bd · 2 ba · 2,103 sqft built 1959 · 0.389 acres | $17,432 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
57 William Penn Dr |
4 bd · 2 ba · 1,766 sqft built 1960 · 0.419 acres | $375,000 Jun 2020 | $14,516 2024 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
59 William Penn Dr |
3 bd · 2 ba · 1,766 sqft built 1960 · 0.419 acres | $510,000 Jun 2010 | $14,804 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |