42 SLOPE DRIVE

Mansfield Twp, Warren County · Block 1903, Lot 12

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Assessment year 2026 · Rate year 2025 · Prior rate 2024

Assessments are tax year 2026; latest published general rate we have is 2025. Estimate uses that rate until the 2026 rate is loaded.

Estimated tax story (homeowner view)
+0.7%

Estimated tax up $55 ($7,474 → $7,529) using 2024→2025 rates (3.537 → 3.563) × assessed net.

Assessment net change: 0.0% ($211,300 → $211,300).

Assessment

Land$80,000
Improvements$131,300
Net (taxable assessed, 2026)$211,300
Town avg ratio used59.32% (Average ratio (Director’s / Chapter 123))
Implied equalized value$356,204
2025 tax (MOD-IV billed)$7,528.62
Est. 2025 tax @ general rate$7,529
Mailing address (2026)42 SLOPE DRIVE, HACKETTSTOWN; NJ, 07840

How the ratio works: New Jersey towns often assess below full market value. The average ratio (Director’s / Chapter 123) estimates what percent of true market value the town’s assessments represent. Implied equalized value ≈ assessed net ÷ (ratio ÷ 100). Example: assessed $187,600 at 55.89% ≈ $335,700 equalized. Tax bills still use assessed value × the general tax rate — not the equalized figure.

Change since the 2025 sale of $490,000: implied equalized value $356,204 is $133,796 below that sale. This is not an appraisal.

This class 2 — residential (four families or less) — net assessment sits below the town class-2 average of $242,362.

Building permits for 42 SLOPE DRIVE

The New Jersey construction-permit file lists 1 permit for 42 SLOPE DRIVE in Mansfield Twp. 1 is still open in the state file. Permit M25-364, an alteration, was issued 8 Dec 2025 and is open in the state file. The reported cost is $2,205.

Permit Type Use Issued Closed Reported cost
M25-364 Alteration International Residential Code 8 Dec 2025 Open in the state file $2,205

The file does not name the work. This file is a full record from 2021 on. Older permits are mostly missing. A repair from before then can be absent here and still be at the Mansfield Twp construction office.

Flood zone for 42 SLOPE DRIVE

The flood map could not be checked for 42 SLOPE DRIVE, because the address did not place a point on the map. Assessment and tax figures on this page are from our own records.

The state’s 10-foot ground scan puts the lowest cell on this lot at 612.7 feet and the highest at 624.7 feet (NAVD88).

These figures are estimates. The zone and any flood elevation come from FEMA’s flood map at a point for this address, and that point can fall in the street. The high and low come from the state’s 10-foot ground scan of the lot outline. A cell can catch a ditch, the street, or the edge of the lot. They are not a survey and not an insurance rating. A licensed surveyor measures the ground and the building. The town floodplain administrator, or a licensed engineer, confirms what the zone means for this lot. No zone at this point, or zone X, does not mean the lot will not flood.

Water and sewer for 42 SLOPE DRIVE

The water and sewer maps could not be checked for 42 SLOPE DRIVE, because the address did not place a point on the map.

Year-by-year assessed value & tax

From NJ MOD-IV files (2023, 2024, 2025, 2026). Tax is the MOD-IV billed amount when present; otherwise —. Current mailing is in Assessment above.

Year Assessed net Tax
2026 $211,300 —
2025 $211,300 $7,528.62
2024 $211,300 $7,473.68
2023 $211,300 $7,505.38

Mailing changed in 2026 to 42 SLOPE DRIVE, HACKETTSTOWN; NJ, 07840.

Assessed value & ratio history

Parcel assessed nets come from MOD-IV year files (2023, 2024, 2025, 2026). Town average ratios are from Abstract / Chapter 123 when available — implied equalized = assessed ÷ (ratio ÷ 100).

Tax year Assessed net Avg ratio Implied equalized Assessed Δ Equalized Δ
2023 $211,300 76.84% $274,987 — —
2024 $211,300 73.03% $289,333 0.0% +5.2%
2025 $211,300 69.81% $302,679 0.0% +4.6%
2026 $211,300 59.32% $356,204 0.0% +17.7%

Tax year history

Assessed net is from that year’s MOD-IV file. Est. tax = assessed × that year’s general rate when we have the rate sheet. Billed tax is the MOD-IV tax field when present (often empty for the newest file year).

Tax year Assessment net General rate Est. tax (that year) Billed tax Est. vs prior
2023 $211,300 3.552 $7,505 $7,505.38 —
2024 $211,300 3.537 $7,474 $7,473.68 -0.4%
2025 $211,300 3.563 $7,529 $7,528.62 +0.7%
2026 $211,300 — — — —

Where your money goes

Component $ = net × (component rate ÷ 100). Percents are share of school + county + municipal components for rate year 2025.

Schools
$4,365 58.0%
County
$1,693 22.5%
Municipal
$1,471 19.5%

Of the estimated increase of $55, the school portion moved $129 up, the county portion $74 down, and the municipal portion $0 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

District school (0.942)$1,990
Regional / consolidated school (1.124)$2,375
County (0.717)$1,515
County library (0.055)$116
County open space (0.029)$61
Municipal purpose (0.676)$1,428
Municipal open space (0.020)$42

Property details

Class2 — Residential (four families or less)
Building class17 — Above standard quality single-family dwelling
Building2SF
Land description.5 AC.
Dwellings1
Commercial units—
Year built1966
Acreage0.5
Zoning—
Tax map page—
Additional lots—
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale$490,000 · 11/11/2025 · sale assessment $211,300
Deed book / page03541 / 00204

The class, building class, SR1A, and special-tax words are the state’s names for those codes. The zoning code is the town’s. A code that is not on the state list keeps the code and says so.

See this lot on the statewide map, then come back for the full tax story.

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Sources: NJ Division of Taxation MOD-IV (current parcel file) and tax rates for 2025 (Abstract of Ratables). Building permits are read live from the NJ construction-permit file for this block and lot. The flood zone is read live from FEMA’s flood map at a point for this address. The high and low are read live from the state’s 10-foot ground scan. Water and sewer are read live from the state’s service-area maps at that same point. Those map readings are estimates, not a survey and not a hookup record. Estimates are not an official tax bill. Owner names are not shown. Water and sewer · Full disclaimer.