Middlesex County and Marlborough City property records for 24 addresses on Kosmas St, Marlborough, MA · Last verified October 2026
| Properties | 24 |
|---|---|
| Median Sale Price | $445,000 |
| Deeds and Mortgages on File | 27 |
| Median Price per Sqft | $423 |
| Owner Occupied | 83% |
| Median Annual Tax Bill | $5,234 |
| Median Year Built | 1972 |
| Median Ownership Tenure | 20 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
10 Kosmas St |
5 bd · 3.5 ba · 1,784 sqft built 1972 · 0.566 acres | $755,000 Jul 2026 | $6,486 2025 | Assessor + 4 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
13 Kosmas St |
3 bd · 2.5 ba · 1,034 sqft built 1972 · 0.516 acres | $445,000 Sep 2020 | $5,061 2025 | Assessor + 2 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
22 Kosmas St |
3 bd · 1.5 ba · 1,214 sqft built 1971 · 0.636 acres | $5,161 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
25 Kosmas St |
4 bd · 1.5 ba · 2,035 sqft built 1971 · 0.516 acres | $6,131 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
32 Kosmas St |
3 bd · 1.5 ba · 1,034 sqft built 1972 · 0.956 acres | $545,000 Apr 2025 | $4,809 2025 | Assessor + 1 Document Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
37 Kosmas St |
3 bd · 2.5 ba · 1,418 sqft built 1972 · 0.526 acres | $5,358 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
40 Kosmas St |
3 bd · 1.5 ba · 1,034 sqft built 1972 · 0.626 acres | $179,900 Feb 1999 | $4,936 2025 | Assessor + 1 Document Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
49 Kosmas St |
3 bd · 2.5 ba · 1,034 sqft built 1972 · 0.556 acres | $169,500 Nov 1988 | $4,933 2025 | Assessor + 1 Document Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
50 Kosmas St |
4 bd · 1.5 ba · 1,288 sqft built 1972 · 0.516 acres | $5,278 2025 | Assessor Updated Aug 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
58 Kosmas St |
3 bd · 1.5 ba · 1,064 sqft built 1971 · 0.526 acres | $187,000 Sep 1998 | $4,953 2025 | Assessor + 2 Documents Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
59 Kosmas St |
3 bd · 1 ba · 1,074 sqft built 1972 · 0.459 acres | $4,658 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
70 Kosmas St |
3 bd · 2 ba · 1,034 sqft built 1972 · 0.536 acres | $4,970 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
78 Kosmas St |
3 bd · 1.5 ba · 1,216 sqft built 1971 · 1.25 acres | $540,000 Jan 2024 | $5,306 2025 | Assessor + 1 Document Updated Sep 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
79 Kosmas St |
3 bd · 2.5 ba · 1,034 sqft built 1971 · 0.512 acres | $288,000 Feb 2002 | $4,993 2025 | Assessor + 2 Documents Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
84 Kosmas St |
3 bd · 1.5 ba · 1,122 sqft built 1972 · 0.986 acres | — Jul 2018 | $4,923 2025 | Assessor + 1 Document Updated Jul 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
94 Kosmas St |
3 bd · 3 ba · 1,684 sqft built 1972 · 0.646 acres | $385,000 Dec 2015 | $5,934 2025 | Assessor + 3 Documents Updated Sep 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
97 Kosmas St |
3 bd · 1.5 ba · 1,066 sqft built 1972 · 0.516 acres | $4,729 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
104 Kosmas St |
3 bd · 2.5 ba · 1,034 sqft built 1972 · 0.606 acres | $329,900 Dec 2003 | $4,910 2025 | Assessor Updated Jul 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
107 Kosmas St |
1 bd · 2.5 ba · 2,008 sqft built 1972 · 0.656 acres | $277,250 Jun 2012 | $6,971 2025 | Assessor + 2 Documents Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
114 Kosmas St |
4 bd · 4.5 ba · 2,442 sqft built 1972 · 0.636 acres | $380,000 Oct 2004 | $8,607 2025 | Assessor + 3 Documents Updated Jul 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
117 Kosmas St |
3 bd · 1.5 ba · 1,555 sqft built 1972 · 0.556 acres | $400,000 Jan 2018 | $6,016 2025 | Assessor + 2 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
124 Kosmas St |
3 bd · 2 ba · 1,064 sqft built 1972 · 0.606 acres | $374,500 Feb 2006 | $5,339 2025 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
133 Kosmas St |
3 bd · 2 ba · 1,386 sqft built 1971 · 0.596 acres | $150,000 Apr 1992 | $6,081 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
134 Kosmas St |
3 bd · 1.5 ba · 1,238 sqft built 1972 · 0.566 acres | $219,900 Jun 1999 | $5,234 2025 | Assessor + 2 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |