Union Ave, Middlesex, NJ Property Records

Middlesex County and Middlesex Borough property records for 83 addresses on Union Ave, Middlesex, NJ · Last verified August 2026

Union Ave Highlights

Properties 98
Median Sale Price $460,000
Deeds and Mortgages on File 87
Median Price per Sqft $276
Owner Occupied 49%
Median Annual Tax Bill $10,136
Median Year Built 1960
Median Ownership Tenure 8 years

Properties on Union Ave

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

95 Union Ave

1,692 sqft · Built 1960 · 0.679 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,050,000May 2024 $21,8402025 Amount on Record Dec 2019 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

101 Union Ave

4,214 sqft · Built 1962 · 0.548 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$350,000Mar 2000 $18,7702025 1 Name on Record AssessorUpdated Jul 2026

102 Union Ave

1,588 sqft · Built 1905 · 0.232 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$109,900Mar 1998 $9,1862025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

106 Union Ave

1,570 sqft · Built 1905 · 0.344 acres

Last Sale Tax Bill Prior Sale Owner Records
$519,000Sep 2025 $10,4882025 Amount on Record Oct 2024 2 Names on Record Owner Occupied Assessor + 5 DocumentsUpdated Jul 2026

114 Union Ave

2,240 sqft · Built 1915 · 0.263 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$83,000Mar 2004 $12,2072025 Amount on Record Sep 2001 1 Name on Record AssessorUpdated Jul 2026

118 Union Ave

5,312 sqft · Built 1915 · 0.232 acres

Last Sale Tax Bill Prior Sale Owner Records
1 Name on Record Owner Occupied AssessorUpdated Jul 2026

121 Union Ave

4,612 sqft · Built 1940 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$17,2912025 1 Name on Record AssessorUpdated Jul 2026

127 Union Ave

8,935 sqft · Built 1984 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$29,3542025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

135 Union Ave

1,769 sqft · Built 1920 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$480,000Nov 2021 $11,8192025 Amount on Record Mar 2002 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

140 Union Ave

800 sqft · Built 1940 · 0.258 acres

Last Sale Tax Bill Prior Sale Owner Records
$385,000May 2014 $7,4202025 1 Name on Record AssessorUpdated Jul 2026

141 Union Ave

6,400 sqft · Built 1978 · 0.459 acres

Last Sale Tax Bill Prior Sale Owner Records
$475,000Nov 1996 $21,0302025 1 Name on Record AssessorUpdated Jul 2026

147 Union Ave

3,000 sqft · Built 1978 · 0.459 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Sep 2017 $13,0592025 Amount on Record Jul 2011 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

155 Union Ave

3,043 sqft · Built 1980 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$585,000Feb 2024 $13,7802025 Amount on Record Jul 2001 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

165 Union Ave

1,830 sqft · Built 1963 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$430,000Mar 2023 $8,3422025 Amount on Record Jan 2006 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

175 Union Ave

1,690 sqft · Built 1930 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$530,000Oct 2024 $9,6352025 Amount on Record Sep 2022 1 Name on Record Owner Occupied Assessor + 4 DocumentsUpdated Jul 2026

205 Union Ave

3,558 sqft · Built 1920 · 1.38 acres

Last Sale Tax Bill Prior Sale Owner Records
$425,000Nov 1996 $16,3242025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

297 Union Ave

1,176 sqft · Built 1957 · 0.486 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$150,500Jun 1994 $8,5462025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

299 Union Ave

1,560 sqft · Built 1950 · 0.498 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$141,000Oct 1994 $8,3022025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

301 Union Ave

3,236 sqft · Built 1963 · 0.499 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$159,900Jun 1987 $14,2872025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

302 Union Ave

1,978 sqft · Built 1960 · 0.436 acres

Last Sale Tax Bill Prior Sale Owner Records
$430,000Jul 2023 Amount on Record Aug 1983 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

303 Union Ave

2,712 sqft · Built 1976 · 0.466 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$12,0692025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

305 Union Ave

3,619 sqft · Built 1977 · 0.558 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$460,000May 2024 $11,4482025 —Feb 2022 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

307 Union Ave

2,315 sqft · Built 1977 · 0.482 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Mar 2006 $12,0312025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

310 Union Ave

1,716 sqft · Built 1952 · 0.183 acres

Last Sale Tax Bill Prior Sale Owner Records
$245,000Mar 2018 $7,9082025 Amount on Record Jan 2010 1 Name on Record Assessor + 3 DocumentsUpdated Jul 2026

323 Union Ave

1,970 sqft · Built 1929 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$460,000Aug 2022 $11,9892025 Amount on Record Apr 2019 1 Name on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

324 Union Ave

1,440 sqft · Built 1939 · 0.248 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$315,000Jul 2016 $10,7102025 Amount on Record Sep 2015 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

331 Union Ave

1,870 sqft · Built 1927 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$530,000May 2024 $9,4642025 Amount on Record Jan 2024 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

332 Union Ave

3,000 sqft · Built 1900 · 0.379 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$140,000Sep 1991 $13,8312025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

337 Union Ave

1,861 sqft · Built 1925 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$525,000Nov 2023 $10,8312025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

344 Union Ave

1,300 sqft · Built 1953 · 0.301 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$437,000Jun 2021 $11,2592025 Amount on Record Jan 2017 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

345 Union Ave

2,100 sqft · Built 1924 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$180,000Dec 1999 $12,1262025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

349 Union Ave

2,086 sqft · Built 1925 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$460,000Jun 2021 $12,1922025 2 Names on Record Owner Occupied Assessor + 3 DocumentsUpdated Jul 2026

357 Union Ave

1,440 sqft · Built 1928 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$142,000Jun 1997 $10,8272025 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

360 Union Ave

2,468 sqft · Built 1910 · 0.266 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$91,000Jan 1986 $13,3332025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

363 Union Ave

3,006 sqft · Built 1927 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$300,000Apr 2014 $12,8012025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

366 Union Ave

1,248 sqft · Built 1951 · 0.19 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$132,000Mar 1998 $8,7072025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

369 Union Ave

1,338 sqft · Built 1951 · 0.459 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$502,000Mar 2024 $9,2732025 Amount on Record Jan 2003 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Aug 2026

379 Union Ave

2,742 sqft · Built 1935 · 0.698 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$540,000May 2021 $14,3742025 Amount on Record Dec 2019 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

409 Union Ave

3,072 sqft · Built 1974 · 0.255 acres

Last Sale Tax Bill Prior Sale Owner Records
$250,000Jul 1998 $10,4202025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

411 Union Ave

2,544 sqft · Built 1920 · 0.279 acres

Last Sale Tax Bill Prior Sale Owner Records
$251,000Jan 2002 $8,3102025 Amount on Record Aug 1998 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

415 Union Ave

2,328 sqft · Built 1990 · 0.195 acres

Last Sale Tax Bill Prior Sale Owner Records
$100,000Dec 2015 $9,1142025 1 Name on Record AssessorUpdated Jul 2026

417 Union Ave

2,328 sqft · Built 1990 · 0.195 acres

Last Sale Tax Bill Prior Sale Owner Records
$100,000Jan 2016 $9,1142025 Amount on Record Aug 1999 1 Name on Record AssessorUpdated Jul 2026

423 Union Ave

1,086 sqft · Built 1925 · 0.472 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$300,000Dec 2021 $6,9962025 Amount on Record Feb 1988 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

431 Union Ave

899 sqft · Built 1935 · 0.189 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$285,000Oct 2019 $7,8842025 Amount on Record Oct 1994 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

435 Union Ave

953 sqft · Built 1936 · 0.181 acres

Last Sale Tax Bill Prior Sale Owner Records
$225,000Aug 2019 $6,3602025 Amount on Record Oct 2000 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

439 Union Ave

1,275 sqft · Built 1924 · 0.189 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$383,000Jul 2021 $10,0062025 Amount on Record Oct 2000 2 Names on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

440 Union Ave

3,440 sqft · Built 2019 · 4,765 acres

Last Sale Tax Bill Prior Sale Owner Records
$750,000Mar 2018 $37,1002025 1 Name on Record AssessorUpdated Jul 2026

443 Union Ave

1,566 sqft · Built 1924 · 0.189 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$260,000Jun 2015 $9,8012025 1 Name on Record Owner Occupied Assessor + 2 DocumentsUpdated Jul 2026

444 Union Ave

4,800 sqft · Built 1920 · 1.6 acres

Last Sale Tax Bill Prior Sale Owner Records
$671,400Jun 1993 $30,5282025 1 Name on Record AssessorUpdated Jul 2026

448 Union Ave

2,105 sqft · Built 1940 · 0.172 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
—Jun 2004 $8,5332025 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

451 Union Ave

1,972 sqft · Built 1938 · 0.189 acres

Last Sale Tax Bill Prior Sale Owner Records
$310,000Oct 2003 $12,3722025 Amount on Record Sep 1993 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

455 Union Ave

1,516 sqft · Built 1926 · 0.189 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$171,500May 2012 $9,3732025 Amount on Record Jul 2006 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

459 Union Ave

1,308 sqft · Built 1927 · 0.189 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$190,000Dec 2011 $10,6342025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

462 Union Ave

1,467 sqft · Built 1930 · 0.202 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$150,000Jun 1987 $8,6642025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

463 Union Ave

1,634 sqft · Built 1924 · 0.241 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$481,000Dec 2024 $9,7202025 Amount on Record Apr 2017 1 Name on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

469 Union Ave

1,988 sqft · Built 1930 · 0.179 acres

Last Sale Tax Bill Prior Sale Owner Records
$525,000Apr 2022 $10,6002025 Amount on Record Apr 2007 2 Names on Record Owner Occupied Assessor + 1 DocumentUpdated Jul 2026

478 Union Ave

9,880 sqft · Built 2005 · 0.632 acres

Last Sale Tax Bill Prior Sale Owner Records
$41,8912025 1 Name on Record AssessorUpdated Jul 2026

484 Union Ave

3,815 sqft · Built 1974 · 0.414 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$430,000Aug 2004 $13,3452025 1 Name on Record AssessorUpdated Jul 2026

495 Union Ave

0.728 acres

Last Sale Tax Bill Prior Sale Owner Records
$275,000Jan 2022 Amount on Record Aug 2017 1 Name on Record AssessorUpdated Jul 2026

495 Union Ave

12 units · Built 1989

Last Sale Median Tax Bill Median Sale    
$172,000Dec 2025 $3,1212025 $275,00012 units    

497 Union Ave

1,902 sqft · Built 2003 · 0.029 acres

Last Sale Tax Bill Prior Sale Owner Records
$292,000Jun 2010 $10,1362025 Amount on Record Feb 2004 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

498 Union Ave

2,760 sqft · Built 1973 · 0.347 acres

Last Sale Tax Bill Prior Sale Owner Records
$300,000Jun 1997 $11,7022025 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

499 Union Ave

1,902 sqft · Built 2003 · 0.029 acres

Last Sale Tax Bill Prior Sale Owner Records
$264,000Dec 2013 $10,1362025 Amount on Record Jan 2004 2 Names on Record Owner Occupied AssessorUpdated Jul 2026

530 Union Ave

4,480 sqft · Built 1960 · 0.369 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$750,000Nov 2021 $17,0962025 Amount on Record Dec 2020 1 Name on Record Assessor + 3 DocumentsUpdated Jul 2026

531 Union Ave

1,932 sqft · Built 1882 · 0.541 acres

Last Sale Tax Bill Prior Sale Owner Records
$455,000Apr 2023 $10,9992025 Amount on Record Jan 2008 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

541 Union Ave

1,672 sqft · Built 1958 · 0.714 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$10,3862025 1 Name on Record AssessorUpdated Jul 2026

550 Union Ave

Built 1970 · 0.32 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$745,000Sep 2006 $14,7002025 Amount on Record Jun 2004 1 Name on Record AssessorUpdated Jul 2026

559 Union Ave

10,638 sqft · Built 2000 · 0.792 acres

Last Sale Tax Bill Prior Sale Owner Records
$33,8292025 1 Name on Record AssessorUpdated Jul 2026

560 Union Ave

2,512 sqft · Built 1958 · 0.231 acres

Last Sale Tax Bill Prior Sale Owner Records
$350,000Aug 2023 $9,1862025 —Aug 2023 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

565 Union Ave

11,452 sqft · Built 1982 · 1.34 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,850,000Sep 2025 $26,7062025 Amount on Record Oct 1995 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

568 Union Ave, #570

2,580 sqft · Built 1983 · 0.451 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$1,850,000Feb 2022 $34,6542025 Amount on Record Apr 2009 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

580 Union Ave

2,326 sqft · Built 1955 · 0.306 acres

Last Sale Tax Bill Prior Sale Owner Records
$640,000Jun 2017 $21,6962025 Amount on Record Jul 2006 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

585 Union Ave

3,233 sqft · Built 1945 · 1.72 acres

Last Sale Tax Bill Prior Sale Owner Records
$13,5022025 2 Names on Record Assessor + 1 DocumentUpdated Jul 2026

601 Union Ave

2,108 sqft · Built 1962 · 2.58 acres

Last Sale Tax Bill Prior Sale Owner Records
$125,000Jul 1999 $7,5282025 2 Names on Record AssessorUpdated Jul 2026

619 Union Ave

5 units · Built 1972

Last Sale Median Tax Bill Median Sale    
$70,000Jan 2023 $3,3622025 $115,0005 units    

619 Union Ave

Built 1992 · 0.02 acres

Last Sale Tax Bill Prior Sale Owner Records
$625,000Jul 2019 $2,7432025 1 Name on Record Assessor + 2 DocumentsUpdated Jul 2026

625 Union Ave

1,758 sqft · Built 1979 · 0.355 acres · Garage

Last Sale Tax Bill Prior Sale Owner Records
$360,000Apr 2019 $10,8502025 Amount on Record Jan 2018 1 Name on Record Assessor + 4 DocumentsUpdated Jul 2026

627 Union Ave

1,640 sqft · Built 2022 · 0.216 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Aug 2022 $9,7162025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

627 Union Ave, #629

0.216 acres

Last Sale Tax Bill Prior Sale Owner Records
$200,000Oct 2021 —Oct 2020 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

629 Union Ave

1,640 sqft · Built 2022 · 0.216 acres

Last Sale Tax Bill Prior Sale Owner Records
$200,000Oct 2020 $9,7162025 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

631 Union Ave

1,640 sqft · Built 2022 · 0.242 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Jul 2022 $9,7162025 —Jun 2022 1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

631 Union Ave, #633

0.242 acres

Last Sale Tax Bill Prior Sale Owner Records
1 Name on Record Assessor + 1 DocumentUpdated Jul 2026

633 Union Ave

1,640 sqft · Built 2022 · 0.242 acres

Last Sale Tax Bill Prior Sale Owner Records
$500,000Jun 2022 $9,7162025 1 Name on Record Owner Occupied AssessorUpdated Jul 2026

Property Records in Nearby Streets