Suffolk County and Southold Town property records for 42 addresses on Old Sound Ave, Mattituck, NY · Last verified October 2026
| Properties | 42 |
|---|---|
| Median Sale Price | $655,000 |
| Deeds and Mortgages on File | 38 |
| Owner Occupied | 45% |
| Median Annual Tax Bill | $6,416 |
| Median Ownership Tenure | 14 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
8500 Old Sound Ave |
10 acres | $270,000Jan 2004 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9280 Old Sound Ave |
0.43 acres | $385,000Oct 2017 | $7,6682024 | Assessor + 1 DocumentUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9330 Old Sound Ave |
0.48 acres | $653,000Jan 2022 | $7,5112024 | Assessor + 2 DocumentsUpdated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9650 Old Sound Ave |
8.86 acres | $4,5382024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9780 Old Sound Ave |
0.46 acres | $427,000May 2010 | $7,8242024 | AssessorUpdated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9900 Old Sound Ave |
0.289 acres | $465,000Feb 2011 | $8,4502024 | AssessorUpdated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10020 Old Sound Ave |
4.53 acres | $330,000Apr 2000 | $12,6752024 | Assessor + 3 DocumentsUpdated Sep 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10120 Old Sound Ave |
0.369 acres | $335,000Apr 2011 | $5,0932024 | AssessorUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10220 Old Sound Ave |
0.66 acres | $290,000Jun 2012 | $4,5302024 | Assessor + 1 DocumentUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10270 Old Sound Ave |
0.25 acres | $150,000Apr 2000 | $5,8602024 | Assessor + 2 DocumentsUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10450 Old Sound Ave |
0.75 acres | $1,200,000May 2024 | $7,8942024 | Assessor + 1 DocumentUpdated Oct 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10505 Old Sound Ave |
0.5 acres | $105,000Jul 1996 | $5,5472024 | Assessor + 1 DocumentUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10530 Old Sound Ave |
0.619 acres | $220,500Nov 2002 | $6,7292024 | Assessor + 2 DocumentsUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10575 Old Sound Ave |
0.5 acres | $975,000Jul 2023 | $6,2532024 | Assessor + 3 DocumentsUpdated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10645 Old Sound Ave |
0.76 acres | $4,4472024 | AssessorUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10725 Old Sound Ave |
0.8 acres | $645,000Apr 2024 | $6,5682024 | Assessor + 1 DocumentUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10800 Old Sound Ave |
0.089 acres | $4,2052024 | AssessorUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10825 Old Sound Ave |
0.789 acres | $7,0422024 | AssessorUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10890 Old Sound Ave |
0.21 acres | $130,000Jul 2001 | $7,1982024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10945 Old Sound Ave |
0.819 acres | $459,500Jun 2013 | $9,3892024 | Assessor + 2 DocumentsUpdated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10950 Old Sound Ave |
0.11 acres | $275,000Apr 2004 | $3,1102024 | AssessorUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11065 Old Sound Ave |
0.819 acres | $315,000Sep 2002 | $6,3612024 | Assessor + 2 DocumentsUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11080 Old Sound Ave |
0.289 acres | $469,000Jul 2021 | $6,4162024 | Assessor + 2 DocumentsUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11170 Old Sound Ave |
0.5 acres | $1,075,000Nov 2023 | $13,1442024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11175 Old Sound Ave |
0.419 acres | $6,7292024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11219 Old Sound Ave |
0.25 acres | $655,000Sep 2023 | $5,0072024 | Assessor + 3 DocumentsUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11255 Old Sound Ave |
0.36 acres | $499,900Mar 2007 | $7,8942024 | AssessorUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11365 Old Sound Ave |
0.489 acres | $500,000May 2015 | $8,2932024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11425 Old Sound Ave |
0.6 acres | $127,000Jul 1999 | $4,8312024 | AssessorUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11485 Old Sound Ave |
0.66 acres | $385,000Dec 2018 | $5,7902024 | Assessor + 2 DocumentsUpdated Sep 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11500 Old Sound Ave |
3.53 acres | $190,000Jun 2000 | $13,7702024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11545 Old Sound Ave |
0.489 acres | $200,000Nov 2001 | $5,3902024 | AssessorUpdated Aug 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11600 Old Sound Ave |
0.439 acres | $275,000Mar 2015 | $3,4432024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11645 Old Sound Ave |
0.25 acres | $280,000Jun 2015 | $4,8512024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11700 Old Sound Ave |
0.4 acres | $5,3202024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11780 Old Sound Ave |
0.25 acres | $229,500Feb 2007 | $10,0152024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11815 Old Sound Ave |
1 acre | $210,000Jun 2000 | $9,4592024 | AssessorUpdated Aug 2026 | 2 Owners on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11850 Old Sound Ave |
0.119 acres | $570,000Apr 2025 | $1,9502024 | Assessor + 1 DocumentUpdated Oct 2026 | Owner on FileOwner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11875 Old Sound Ave |
0.53 acres | $77,000Jun 1997 | $4,5382024 | AssessorUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11950 Old Sound Ave |
0.25 acres | $270,000Feb 2018 | $9,4892024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
12425 Old Sound Ave |
0.439 acres | $435,500Apr 2020 | $5,6332024 | Assessor + 1 DocumentUpdated Aug 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
12585 Old Sound Ave |
3.88 acres | $2,400,000Jan 2020 | $44,1282024 | Assessor + 3 DocumentsUpdated Aug 2026 | Owner on File |