Suffolk County and Brookhaven Town property records for 13 addresses on Mountain St, Ronkonkoma, NY · Last verified October 2026
| Properties | 13 |
|---|---|
| Median Sale Price | $370,000 |
| Deeds and Mortgages on File | 14 |
| Median Price per Sqft | $247 |
| Owner Occupied | 100% |
| Median Annual Tax Bill | $11,135 |
| Median Year Built | 1965 |
| Median Ownership Tenure | 8 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
2 Mountain St |
3 bd · 1 ba · 1,416 sqft built 1966 · 0.25 acres | $319,000 Nov 2003 | $10,720 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
5 Mountain St |
4 bd · 1 ba · 2,140 sqft built 1965 · 0.25 acres | $340,500 Sep 2019 | $11,135 2024 | Assessor + 4 Documents Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
6 Mountain St |
4 bd · 1 ba · 1,652 sqft built 1965 · 0.25 acres | $8,335 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
7 Mountain St |
5 bd · 2 ba · 2,178 sqft built 1965 · 0.25 acres | $400,000 Jan 2018 | $11,419 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
8 Mountain St |
3 bd · 1 ba · 1,140 sqft built 1966 · 0.25 acres | $173,000 Dec 2000 | $10,075 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9 Mountain St |
4 bd · 1 ba · 1,740 sqft built 1964 · 0.25 acres | $430,000 Mar 2022 | $16,139 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10 Mountain St |
5 bd · 2 ba · 2,072 sqft built 1965 · 0.25 acres | $15,413 2024 | Assessor Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11 Mountain St |
3 bd · 2 ba · 1,404 sqft built 1964 · 0.21 acres | $13,112 2024 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
12 Mountain St |
3 bd · 1 ba · 1,140 sqft built 1965 · 0.25 acres | $312,000 Sep 2015 | $11,995 2024 | Assessor Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
14 Mountain St |
4 bd · 1 ba · 1,412 sqft built 1965 · 0.25 acres | $370,000 Oct 2019 | $9,615 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
15 Mountain St |
4 bd · 1 ba · 1,684 sqft built 1964 · 0.25 acres | $200,000 Jul 2026 | $10,620 2024 | Assessor + 2 Documents Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
16 Mountain St |
3 bd · 1 ba · 1,404 sqft built 1966 · 0.25 acres | $360,000 Jan 2007 | $10,060 2024 | Assessor Updated Aug 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
17 Mountain St |
3 bd · 1 ba · 1,856 sqft built 1965 · 0.25 acres | $385,000 Aug 2005 | $11,780 2024 | Assessor + 1 Document Updated Aug 2026 | 2 Owners on File Owner Occupied |