21 Highland Avenue Hackettstown, NJ 07840

Built 1966 · ResidentialNew owner since Dec 9, 20252 owner signals on a paid plan
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Assessed
$232,400
Last sale
$440,000Dec 9, 2025
Built
1966
Size
1,820 sq ft
Owner
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Status
No open cases

Property information

Block
2001
Lot
5
Qualifier
—
County
Warren
Municipality
Mansfield Twp
Tax map page
—
Land description
.5 AC.

Building details

Building class
17
Description
2SF
Dwellings
1
Zoning
—
Square feet
1,820
Acreage
0.5 ac

Assessment

Land value
$98,700
42%
Improvement value
$133,700
58%
Total assessment
$232,400
Sale assessment
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Tax (2024)
$8,220

Owner mailing

Street address

Property information on this site is compiled from public sources and is provided as-is; we do not guarantee its accuracy.

2 events · 1966–2025

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  • Deed recorded

    $440,000
    Per sq ft$242Sq ft1,820NU codeEstate / executor (10)RecordedDec 18, 2025
  • 60 years

  • Property Built

County clerks also index recorded documents by address and by the names on them. Search Warren County records

YearProperty taxChangeLandImprovementAssessment
2024$8,220-0.4%$98,700$133,700$232,400
2023$8,255+1.1%$98,700$133,700$232,400
2022$8,164+1.0%$98,700$133,700$232,400
2021$8,083+1.6%$98,700$133,700$232,400
2020$7,957+1.8%$98,700$133,700$232,400
2019$7,820+2.2%$98,700$133,700$232,400
2018$7,655+2.3%$98,700$133,700$232,400
2017$7,481+2.2%$98,700$133,700$232,400
2016$7,323+3.3%$98,700$133,700$232,400
2015$7,091-9.8%$98,700$133,700$232,400
2014$7,859+1.8%$98,700$133,700$232,400
2013$7,721+0.2%$113,700$136,900$250,600
2012$7,703+1.4%$113,700$136,900$250,600
2011$7,596+1.8%$113,700$136,900$250,600
2010$7,458+3.5%$113,700$136,900$250,600
2009$7,205+3.4%$113,700$136,900$250,600
2008$6,967+0.7%$113,700$136,900$250,600
2007$6,917+8.7%$113,700$136,900$250,600
2006$6,365+5.0%$113,700$136,900$250,600
2005$6,065+8.5%$113,700$136,900$250,600
2004$5,588+5.4%$113,700$136,900$250,600
2003$5,302+4.3%$113,700$136,900$250,600
2002$5,085+4.2%$46,200$89,400$135,600
2001$4,882+2.3%$46,200$89,400$135,600
2000$4,7730.0%$46,200$89,400$135,600
1999$4,773+2.6%$46,200$89,400$135,600
1998$4,651+7.5%$46,200$89,400$135,600
1997$4,326+9.6%$46,200$89,400$135,600
1996$3,946+3.6%$46,200$89,400$135,600
1995$3,810+24.3%$46,200$89,400$135,600
1994$3,065+3.2%$46,200$89,400$135,600
1993$2,970-4.8%$46,200$89,400$135,600
1992$3,119-13.2%$46,200$89,400$135,600
1991$3,5930.0%$46,200$89,400$135,600
1990$3,593+10.0%$46,200$89,400$135,600
1989$3,268—$46,200$89,400$135,600

All 8 lots on Block 2001