Suffolk County and Boston City property records for 32 addresses on Union St, Charlestown, MA · Last verified October 2026
| Properties | 47 |
|---|---|
| Median Sale Price | $975,000 |
| Deeds and Mortgages on File | 49 |
| Median Price per Sqft | $814 |
| Owner Occupied | 49% |
| Median Annual Tax Bill | $13,229 |
| Median Year Built | 1899 |
| Median Ownership Tenure | 13 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
9 Union St |
2 bd · 3.5 ba · 2,840 sqft built 1880 · 0.065 acres | $19,948 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11 Union St |
2,156 sqft built 1999 · 0.049 acres | $395,000 Aug 1997 | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
11 Union St |
3 units · 1,100 sq ft Built 1875 | $995,000 Feb 2023 | $11,615 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
13 Union St |
2,240 sqft built 1880 · 0.051 acres | $729,000 Jul 2001 | Assessor + 1 Document Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
13, #1 Union St |
3 bd · 2.5 ba · 1,875 sqft built 2001 · 0.043 acres | $1,650,000 Aug 2024 | $16,541 2025 | Assessor + 1 Document Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
13, #2 Union St |
2 bd · 2.5 ba · 1,750 sqft built 2001 · 0.04 acres | $1,425,000 Jul 2023 | $15,624 2025 | Assessor + 2 Documents Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
15R Union St |
6 bd · 5 ba · 3,870 sqft built 2009 · 0.067 acres | $18,347 2025 | Assessor Updated Jul 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
16 Union St |
3 units · 756 sq ft Built 1875 | $975,000 Sep 2022 | $7,911 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
16 Union St |
5 bd · 3 ba · 1,450 sqft built 1875 · 0.033 acres | $680,000 Mar 2006 | Assessor Updated Apr 2026 | 2 Owners on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
16R Union St |
6 bd · 3 ba · 2,812 sqft built 1870 · 0.033 acres | $16,319 2025 | Assessor + 1 Document Updated Oct 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
17 Union St |
5 bd · 2.5 ba · 1,920 sqft built 1980 · 0.05 acres | $12,343 2025 | Assessor Updated Apr 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
18 Union St |
1,196 sqft built 1999 · 0.027 acres | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
18 Union St |
3 units · 690 sq ft Built 1905 | $689,000 Aug 2021 | $6,535 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
19 Union St |
3 bd · 3.5 ba · 2,300 sqft built 1870 · 0.043 acres | $1,060,000 Dec 2011 | $23,930 2025 | Assessor + 4 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
20 Union St |
4 ba · 2,247 sqft built 1900 · 0.03 acres | $195,000 Jun 1987 | $14,012 2025 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
21 Union St |
4 bd · 3 ba · 2,699 sqft built 1870 · 0.047 acres | $1,015,000 Aug 2007 | $27,573 2025 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
22 1/2 Union St |
4 bd · 2.5 ba · 2,709 sqft built 1870 · 0.034 acres | $14,775 2025 | Assessor + 3 Documents Updated Apr 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
22 Union St |
4 bd · 3 ba · 2,247 sqft built 1870 · 0.034 acres | $210,000 Apr 1994 | $13,586 2025 | Assessor + 5 Documents Updated Apr 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
23 Union St |
2,719 sqft built 1999 · 0.062 acres | $135,000 May 1991 | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
23 Union St |
4 units · 606 sq ft Built 1870 | $725,000 Aug 2021 | $7,088 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
26, #28 Union St |
11,580 sqft built 1960 · 0.258 acres | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
29, #29A Union St |
4 bd · 2.5 ba · 1,888 sqft built 1875 · 0.057 acres | $15,265 2025 | Assessor Updated Jul 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
30 Union St |
5 bd · 3.5 ba · 2,539 sqft built 1792 · 0.062 acres | $267,500 Jun 1994 | $17,451 2025 | Assessor Updated Jul 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
31 Union St |
1,975 sqft built 1999 · 0.045 acres | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
31 Union St |
3 units · 794 sq ft Built 1870 | $930,000 Jun 2020 | $11,224 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
35 Union St |
5 bd · 4.5 ba · 4,241 sqft built 1865 · 0.048 acres | $1,520,000 Sep 2011 | $35,424 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
37 Union St |
7 bd · 4 ba · 4,062 sqft built 1986 · 0.05 acres | — Mar 2017 | $18,327 2025 | Assessor + 1 Document Updated Apr 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
39 Union St |
4 bd · 6.5 ba · 2,300 sqft built 1899 · 0.052 acres | $500,500 May 2012 | Assessor Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
39 Union St |
3 units · 1,194 sq ft Built 1899 | $800,000 Apr 2018 | $14,077 2025 |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
41 Union St |
3 bd · 3.5 ba · 2,241 sqft built 1996 · 0.04 acres | $1,040,000 May 2013 | $22,622 2025 | Assessor Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
56 Union St |
1,970 sqft built 1930 · 0.045 acres | $1,070,000 Jan 2019 | Assessor + 1 Document Updated Apr 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
56 Union St |
3 units · 1,335 sq ft Built 1930 | $1,120,000 Jul 2021 | $13,229 2025 |