21 Slope Drive Hackettstown, NJ 07840

Built 1966 · ResidentialNew owner since Apr 14, 20262 owner signals on a paid plan
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Assessed
$216,500
Last sale
$510,000Apr 14, 2026
Built
1966
Size
1,846 sq ft
Owner
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Status
No open cases

Property information

Block
2104
Lot
19
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
1,846
Acreage
0.5 ac

Assessment

Land value
$78,500
36%
Improvement value
$138,000
64%
Total assessment
$216,500
Sale assessment
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Tax (2024)
$7,658

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.

3 events · 1966–2026

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  • Deed recorded

    +223% vs 1989
    $510,000
    Per sq ft$276Held36.5 yrsSq ft1,846RecordedMay 11, 2026
  • 37 years

  • Deed recorded

    $158,000
  • 24 years

  • Property Built

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

YearProperty taxChangeLandImprovementAssessment
2024$7,658-0.4%$78,500$138,000$216,500
2023$7,690+1.1%$78,500$138,000$216,500
2022$7,606+1.0%$78,500$138,000$216,500
2021$7,530+1.6%$78,500$138,000$216,500
2020$7,413+1.8%$78,500$138,000$216,500
2019$7,285+2.2%$78,500$138,000$216,500
2018$7,132+2.3%$78,500$138,000$216,500
2017$6,969+2.2%$78,500$138,000$216,500
2016$6,822+3.3%$78,500$138,000$216,500
2015$6,605-11.4%$78,500$138,000$216,500
2014$7,454+1.8%$78,500$138,000$216,500
2013$7,324+0.2%$93,500$144,200$237,700
2012$7,307+1.4%$93,500$144,200$237,700
2011$7,205+1.8%$93,500$144,200$237,700
2010$7,074+3.5%$93,500$144,200$237,700
2009$6,834+6.8%$93,500$144,200$237,700
2008$6,400+0.7%$93,500$136,700$230,200
2007$6,354+8.7%$93,500$136,700$230,200
2006$5,847+5.0%$93,500$136,700$230,200
2005$5,571+9.1%$93,500$136,700$230,200
2004$5,107+3.9%$93,500$135,500$229,000
2003$4,915+4.3%$93,500$135,500$229,000
2002$4,714+4.2%$38,100$87,600$125,700
2001$4,525+2.3%$38,100$87,600$125,700
2000$4,4250.0%$38,100$87,600$125,700
1999$4,425+2.6%$38,100$87,600$125,700
1998$4,312+7.5%$38,100$87,600$125,700
1997$4,010+9.6%$38,100$87,600$125,700
1996$3,658+3.6%$38,100$87,600$125,700
1995$3,532+24.3%$38,100$87,600$125,700
1994$2,841+3.2%$38,100$87,600$125,700
1993$2,753-4.8%$38,100$87,600$125,700
1992$2,891-13.2%$38,100$87,600$125,700
1991$3,3310.0%$38,100$87,600$125,700
1990$3,331+10.0%$38,100$87,600$125,700
1989$3,029—$38,100$87,600$125,700

All 24 lots on Block 2104