Union St, Nantucket, MA Property Records

Nantucket County and Nantucket Town property records for 83 addresses on Union St, Nantucket, MA · Last verified August 2026

Union St Highlights

Properties 86
Median Sale Price $1,912,500
Deeds and Mortgages on File 99
Median Price per Sqft $1,060
Owner Occupied 8%
Median Annual Tax Bill $9,877
Median Year Built 1850
Median Ownership Tenure 8 years

Properties on Union St

Owner names and prior sale amounts shown locked below are available instantly with a free trial.

2 Union St

1 bd · 2 ba · 2,788 sqft · 0.035 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,850,000Oct 2019 $16,9492025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

3 Union St

1 bd · 2 ba · 5,265 sqft · 0.371 acres

Last Sale Tax Bill Prior Sale Owner Records
$31,0632025 1 Name on Record AssessorUpdated Apr 2026

6 Union St

5 bd · 9 ba · 6,608 sqft · 0.179 acres

Last Sale Tax Bill Prior Sale Owner Records
$25,7392024 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

7 Union St

14 bd · 9 ba · 5,919 sqft · 0.194 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$910,000Mar 1998 $25,4742025 Amount on Record Jan 1988 1 Name on Record AssessorUpdated Apr 2026

8 Union St

5 bd · 2 ba · 1,935 sqft

Last Sale Tax Bill Prior Sale Owner Records
$50,000Jan 2025 $8,4512025 Amount on Record Nov 1992 1 Name on Record AssessorUpdated Jul 2026

8R Union St

2 bd · 1 ba · 600 sqft

Last Sale Tax Bill Prior Sale Owner Records
$1,800,000Sep 2025 $4,4152025 Amount on Record Jul 2021 1 Name on Record Assessor + 3 DocumentsUpdated Jul 2026

9 Union St

5 bd · 5 ba · 3,378 sqft · 0.082 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,100,000Jul 2021 $19,7942025 Amount on Record Sep 2014 1 Name on Record Assessor + 5 DocumentsUpdated May 2026

10 Union St

Built 1930 · 0.274 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,850,000Sep 2020 $15,3612025 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

11 Union St

4 bd · 4.5 ba · 2,008 sqft · 0.047 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,222,000Apr 2018 $11,2222025 Amount on Record Feb 2014 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

11R Union St

4 bd · 5.5 ba · 2,995 sqft · 0.052 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,150,000Feb 2018 $15,5402025 Amount on Record Mar 2016 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

13 Union St

5 bd · 3 ba · 2,490 sqft · 0.106 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,700,000Oct 2018 $16,5272025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

14 Union St

3 bd · 2 ba · 2,264 sqft · 0.085 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,408,000May 2021 $9,0882025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

15 Union St

4 bd · 4.5 ba · 2,821 sqft · 0.081 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,875,000Jan 2021 $11,5612025 Amount on Record Jan 2008 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

16 Union St

4 bd · 3.5 ba · 2,815 sqft · 0.097 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,881,200Aug 2025 $10,9802025 Amount on Record Jun 1990 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

17 Union St

4 bd · 2.5 ba · 3,166 sqft · 0.069 acres

Last Sale Tax Bill Prior Sale Owner Records
$600,000Aug 1984 $11,4672025 2 Names on Record AssessorUpdated Apr 2026

18 Union St

6 bd · 6.5 ba · 3,060 sqft · 0.1 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,835,000Dec 2016 $16,1642025 Amount on Record Jan 2015 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

19 Union St

3 bd · 5.5 ba · 4,104 sqft · 0.115 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,350,000Sep 2020 $14,6342025 Amount on Record Jan 2016 1 Name on Record Assessor + 3 DocumentsUpdated Apr 2026

20 Union St

Built 1830 · 0.294 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2015 $20,0302025 Amount on Record Sep 2015 2 Names on Record AssessorUpdated Apr 2026

21 Union St

4 bd · 2.5 ba · 2,494 sqft · 0.124 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,912,500Jan 2022 $12,0252025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

22 Union St

5 bd · 5.5 ba · 3,711 sqft · 0.354 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2015 $17,8862025 Amount on Record Sep 2015 2 Names on Record AssessorUpdated Apr 2026

23 Union St

4 bd · 3.5 ba · 2,367 sqft · 0.103 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,350,000Oct 2014 $11,9612025 Amount on Record Jul 1998 1 Name on Record AssessorUpdated Apr 2026

23A Union St

5 bd · 5.5 ba · 3,305 sqft · 0.116 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,600,000Mar 2016 $13,4612025 Amount on Record Mar 2006 1 Name on Record AssessorUpdated Jul 2026

23B Union St

5 bd · 5.5 ba · 3,305 sqft · 0.117 acres

Last Sale Tax Bill Prior Sale Owner Records
—May 2016 $13,5412025 Amount on Record Mar 2006 1 Name on Record AssessorUpdated Jul 2026

24 1/2 Union St

4 bd · 3.5 ba · 2,648 sqft · 0.115 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,100,000Oct 1998 $12,5642025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

24 Union St

3 bd · 3.5 ba · 2,028 sqft · 0.062 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,630,000May 2021 $7,6002025 Amount on Record Mar 2014 2 Names on Record Assessor + 2 DocumentsUpdated Apr 2026

25 Union St

5 bd · 2.5 ba · 3,537 sqft · 0.144 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,365,000Aug 2024 $15,6182025 —Oct 2015 2 Names on Record AssessorUpdated Apr 2026

26 Union St

4 bd · 4 ba · 3,237 sqft · 0.154 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,475,000Oct 2015 $16,4352025 Amount on Record Oct 2014 1 Name on Record Assessor + 2 DocumentsUpdated Apr 2026

27 Union St

5 bd · 5.5 ba · 3,139 sqft · 0.076 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,715,000Jun 2025 $13,4882025 —Dec 2012 2 Names on Record Assessor + 2 DocumentsUpdated Apr 2026

28 Union St

5 bd · 3.5 ba · 3,038 sqft · 0.101 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,645,000Dec 2023 $11,9902025 Amount on Record Nov 1999 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

29 Union St

4 bd · 4.5 ba · 2,534 sqft · 0.118 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,381,450Apr 2019 $12,1022025 Amount on Record Mar 2012 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

30 Union St

4 bd · 5 ba · 4,010 sqft · 0.264 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,600,000Oct 2021 $17,9012025 —Jan 2009 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

31 Union St

4 bd · 3 ba · 2,583 sqft · 0.114 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$11,8442025 1 Name on Record AssessorUpdated Jul 2026

32 Union St

5 bd · 5.5 ba · 3,366 sqft · 0.124 acres

Last Sale Tax Bill Prior Sale Owner Records
$5,848,500Nov 2024 $16,6052025 Amount on Record Nov 2022 1 Name on Record Assessor + 2 DocumentsUpdated Apr 2026

33 Union St

6 bd · 3 ba · 2,442 sqft · 0.111 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,150,000Jan 2000 $13,3272025 Amount on Record Nov 1993 2 Names on Record AssessorUpdated Apr 2026

34 Union St

3 bd · 2.5 ba · 1,897 sqft · 0.184 acres

Last Sale Tax Bill Prior Sale Owner Records
$11,7482025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

35 Union St

4 bd · 4.5 ba · 1,848 sqft · 0.056 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,675,000Jan 2021 $9,0082025 —Sep 2015 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

36 1/2 Union St

0.214 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,000,000Oct 2014 $11,8882025 Amount on Record Sep 1988 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

36 Union St

5 bd · 3.5 ba · 2,189 sqft · 0.097 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,500,000Jan 2024 $10,2652025 Amount on Record Mar 2014 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

37 Union St

4 bd · 3 ba · 2,554 sqft · 0.087 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,443,915Sep 2003 $11,3082025 Amount on Record Nov 1996 2 Names on Record Assessor + 2 DocumentsUpdated Apr 2026

38 Union St

5 bd · 4 ba · 2,800 sqft · 0.109 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,520,000Apr 2022 $11,8492025 Amount on Record Sep 1992 1 Name on Record Assessor + 4 DocumentsUpdated Jul 2026

39 Union St

3 bd · 3 ba · 1,944 sqft · 0.124 acres

Last Sale Tax Bill Prior Sale Owner Records
$8,5232025 2 Names on Record Owner Occupied AssessorUpdated Apr 2026

40 Union St

4 units · Built 1860 · 448 sq ft

Last Sale Median Tax Bill Median Sale    
$1,900,000Oct 2025 $6,2222025 $1,500,0004 units    

41 Union St

5 bd · 5.5 ba · 3,693 sqft · 0.154 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,300,000Nov 1998 $14,1122025 Amount on Record Jul 1995 2 Names on Record AssessorUpdated Jul 2026

42 Union St, #A

4 bd · 3.5 ba · 3,228 sqft · 0.064 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,830,000Nov 2018 $13,0002025 Amount on Record Jun 2017 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

42 Union St, #B

3 bd · 3.5 ba · 1,879 sqft · 0.051 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$3,725,000Aug 2023 $10,6362025 Amount on Record May 2020 1 Name on Record Assessor + 2 DocumentsUpdated Aug 2026

43 Union St

4 bd · 2 ba · 1,339 sqft · 0.039 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,495,000Apr 2007 $6,8502025 Amount on Record Oct 2004 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

43A Union St

0.021 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,5142025 1 Name on Record AssessorUpdated Jul 2026

44 Union St

5 bd · 3 ba · 2,670 sqft · 0.314 acres

Last Sale Tax Bill Prior Sale Owner Records
$8,3242025 2 Names on Record Assessor + 3 DocumentsUpdated Apr 2026

45 Union St

2 bd · 1.5 ba · 1,001 sqft · 0.038 acres

Last Sale Tax Bill Prior Sale Owner Records
$225,000Feb 1996 $4,9382025 2 Names on Record Owner Occupied AssessorUpdated Apr 2026

46 Union St

4 bd · 3.5 ba · 1,979 sqft · 0.154 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,650,000Oct 2020 $9,8772025 1 Name on Record Assessor + 2 DocumentsUpdated Apr 2026

47 Union St

4 bd · 3 ba · 2,170 sqft · 0.194 acres

Last Sale Tax Bill Prior Sale Owner Records
$196,000Apr 1991 $7,7632025 Amount on Record Sep 1990 1 Name on Record Owner Occupied AssessorUpdated Apr 2026

48 Union St

4 bd · 2.5 ba · 2,247 sqft · 0.134 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$2,395,000Nov 2021 $9,4672025 Amount on Record Aug 2014 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

49 Union St

3 bd · 1 ba · 1,870 sqft · 0.174 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,695,000May 2022 $5,6242025 Amount on Record Jul 1998 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

50 Union St

4 bd · 2 ba · 1,925 sqft · 0.083 acres

Last Sale Tax Bill Prior Sale Owner Records
—Dec 2014 —Oct 2014 1 Name on Record AssessorUpdated Apr 2026

51 Union St

3 bd · 2.5 ba · 1,686 sqft · 0.116 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,500,000Nov 2022 $8,1182025 Amount on Record Jul 2020 1 Name on Record Assessor + 3 DocumentsUpdated Apr 2026

52 Union St

3 bd · 3 ba · 1,862 sqft · 0.082 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,700,000Jul 2021 $9,6502025 Amount on Record May 1995 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

53 Union St

3 bd · 2 ba · 1,524 sqft · 0.047 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,775,000Dec 2023 $5,5792025 Amount on Record Oct 2017 1 Name on Record Assessor + 4 DocumentsUpdated Aug 2026

54 Union St

3 bd · 2 ba · 1,006 sqft · 0.106 acres

Last Sale Tax Bill Prior Sale Owner Records
$172,500Jun 1995 $4,3902025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

54R Union St

576 sqft · Built 1952 · 0.059 acres

Last Sale Tax Bill Prior Sale Owner Records
$611,000Jul 2025 $4,6322025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

55 Union St

3 bd · 2.5 ba · 2,466 sqft · 0.104 acres

Last Sale Tax Bill Prior Sale Owner Records
$400,000Nov 2014 $7,1632025 1 Name on Record AssessorUpdated Jul 2026

56 Union St

1 bd · 3 ba · 5,237 sqft · 0.387 acres

Last Sale Tax Bill Prior Sale Owner Records
$3,625,000Oct 2021 $16,8882024 Amount on Record Feb 2005 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

57 Union St

5 bd · 7.5 ba · 2,430 sqft · 0.095 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,250,000Aug 2006 $7,9722025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

58 Union St

0.114 acres

Last Sale Tax Bill Prior Sale Owner Records
—Feb 2005 $4,4352025 Amount on Record — 1 Name on Record Assessor + 2 DocumentsUpdated Apr 2026

63 Union St

3 bd · 2 ba · 940 sqft · 0.1 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,9172025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

64 Union St

Built 1940 · 0.356 acres

Last Sale Tax Bill Prior Sale Owner Records
$11,7902025 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Apr 2026

65 Union St

4 bd · 2 ba · 1,352 sqft · 0.073 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,8532025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Apr 2026

66 Union St

3 bd · 2.5 ba · 1,089 sqft · 0.073 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,750,000Mar 2025 $4,5492025 Amount on Record Sep 2003 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

67 Union St

4 bd · 3.5 ba · 2,035 sqft · 0.084 acres

Last Sale Tax Bill Prior Sale Owner Records
—Sep 2016 $7,6432025 Amount on Record Dec 2015 1 Name on Record AssessorUpdated Apr 2026

68 Union St

Built 1900 · 0.184 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,155,000Nov 2011 $8,8112025 Amount on Record Jan 1998 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

68A Union St

2 bd · 1 ba · 520 sqft · 0.117 acres

Last Sale Tax Bill Prior Sale Owner Records
$4,0772025 2 Names on Record AssessorUpdated Apr 2026

69 Union St

2 bd · 2 ba · 1,197 sqft · 0.08 acres

Last Sale Tax Bill Prior Sale Owner Records
$698,000Aug 2016 $4,9172025 1 Name on Record Assessor + 1 DocumentUpdated Aug 2026

70 Union St

4 bd · 3.5 ba · 3,100 sqft · 0.154 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,425,000Oct 2014 $9,4802025 —Mar 2007 1 Name on Record AssessorUpdated Apr 2026

71 Union St, #73

Built 1845 · 0.103 acres

Last Sale Tax Bill Prior Sale Owner Records
$650,000Jan 2001 $4,5192025 2 Names on Record Assessor + 1 DocumentUpdated Aug 2026

72 Union St

3 bd · 3.5 ba · 1,708 sqft · 0.114 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,785,000Sep 2021 $7,6552025 Amount on Record Jul 2012 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

74 Union St

3 bd · 1 ba · 1,468 sqft · 0.224 acres

Last Sale Tax Bill Prior Sale Owner Records
—Jan 2015 $6,9752025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

76 Union St

4 bd · 3.5 ba · 2,188 sqft · 0.081 acres

Last Sale Tax Bill Prior Sale Owner Records
$2,130,000Jun 2018 $9,3892025 Amount on Record Jun 2011 2 Names on Record Assessor + 3 DocumentsUpdated Jul 2026

79 Union St

5 bd · 2.5 ba · 2,128 sqft · 0.134 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,100,000Apr 2011 $7,0782025 Amount on Record Nov 2004 2 Names on Record Assessor + 2 DocumentsUpdated Jul 2026

82 Union St

2 bd · 2 ba · 1,319 sqft · 0.077 acres

Last Sale Tax Bill Prior Sale Owner Records
$605,000Jul 2013 $4,1132025 Amount on Record Apr 1991 2 Names on Record Assessor + 2 DocumentsUpdated Apr 2026

84 Union St

0.874 acres

Last Sale Tax Bill Prior Sale Owner Records
$20,000Mar 1985 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

84R Union St

0.874 acres

Last Sale Tax Bill Prior Sale Owner Records
$20,000Feb 1984 1 Name on Record Assessor + 1 DocumentUpdated Apr 2026

85 Union St

0.214 acres

Last Sale Tax Bill Prior Sale Owner Records
$175,000Oct 1995 $3,5512025 2 Names on Record Assessor + 1 DocumentUpdated Apr 2026

86 Union St

3 bd · 2.5 ba · 2,608 sqft · 0.464 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,375,000Apr 2006 1 Name on Record AssessorUpdated Apr 2026

90 Union St

0.609 acres

Last Sale Tax Bill Prior Sale Owner Records
$1,300,000Jun 2004 1 Name on Record AssessorUpdated Apr 2026

Wildfire Risk on Union St

Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024), fuels as of 2020

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

Property Records in Nearby Streets