25 PROSPECT AVENUE

West Orange Twp, Essex County · Block 151, Lot 1

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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)
-43.9%

Estimated tax down $687,087 ($1,564,568 → $877,481) using 2024→2025 rates (4.684 → 2.627) × assessed net.

Assessment net change: 0.0% ($33,402,400 → $33,402,400).

Assessment

Land$24,300,000
Improvements$9,102,400
Net (taxable assessed, 2026)$33,402,400
Town avg ratio used99.99% (Average ratio (Director’s / Chapter 123))
Implied equalized value$33,405,741
2025 tax (MOD-IV billed)$877,481.05
Est. 2025 tax @ general rate$877,481
Mailing address (2026)P O BOX 194, MONTCLAIR N J, 07042

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.

Building permits for 25 PROSPECT AVENUE

The New Jersey construction-permit file lists 30 permits for 25 PROSPECT AVENUE in West Orange Twp. 29 are still open in the state file. Permit 20250090U, a new building, was issued 28 Feb 2025 and is open in the state file. The reported cost is $4,000.

Permit Type Use Issued Closed Reported cost
90-0190 Alteration Business Uses 7 Mar 1990 Open in the state file $4,500
00020201629U Alteration Accessory buildings and miscellaneous structures 7 Sep 2021 Open in the state file $2,000,905
00020201629U Alteration Accessory buildings and miscellaneous structures 13 Oct 2021 Open in the state file $1
000020211891 Alteration International Residential Code 21 Oct 2021 Open in the state file $3,500
000020220376 Alteration Business Uses 2 Mar 2022 Open in the state file $96,000
000020220980 Alteration Accessory buildings and miscellaneous structures 12 May 2022 27 May 2022, Certificate of Compliance $1
000020221338 Alteration Business Uses 21 Jul 2022 Open in the state file $21,300
20230754 Alteration High Hazard Buildings � Combustion or Physical Hazard 27 Apr 2023 Open in the state file $1
20230792 Alteration International Residential Code 9 May 2023 Open in the state file $7,000
20231013 New Accessory buildings and miscellaneous structures 27 Jun 2023 Open in the state file $384,500
20240731 Alteration Accessory buildings and miscellaneous structures 19 Apr 2024 Open in the state file $1
20241861 Alteration International Residential Code 2 Oct 2024 Open in the state file $40,000
20241842 Alteration Accessory buildings and miscellaneous structures 10 Oct 2024 Open in the state file $70,100
20242319 Alteration Business Uses 25 Nov 2024 Open in the state file $40,000
20242320 Alteration Business Uses 25 Nov 2024 Open in the state file $40,000
20250049 Addition Business Uses 10 Jan 2025 Open in the state file $916,000
20242509 Alteration International Residential Code 22 Jan 2025 Open in the state file $1,500
20250090 New Business Uses 28 Jan 2025 Open in the state file $470,000
20250179 Alteration International Residential Code 14 Feb 2025 Open in the state file $2,060
20250090U New Business Uses 28 Feb 2025 Open in the state file $4,000
20250049U Addition Business Uses 28 Feb 2025 Open in the state file $120,000
20242108 Alteration International Residential Code 3 Mar 2025 Open in the state file $243,444
20250403 Alteration Outdoor Activities, Grandstands, stadiums, tents, coliseums, etc. 13 Mar 2025 Open in the state file $16,100
20250508 Alteration Outdoor Activities, Grandstands, stadiums, tents, coliseums, etc. 24 Mar 2025 Open in the state file $150,000
20250699 Alteration Accessory buildings and miscellaneous structures 22 Apr 2025 Open in the state file $23,500
20250049U Addition Business Uses 22 Apr 2025 Open in the state file $16,500
20250049U Addition Business Uses 23 Apr 2025 Open in the state file $1,760
20250049U Addition Business Uses 23 Apr 2025 Open in the state file $1,000
20250777 Alteration Accessory buildings and miscellaneous structures 25 Apr 2025 Open in the state file $1
20250775 Alteration International Residential Code 11 Aug 2025 Open in the state file $16,500

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 West Orange Twp construction office.

Flood zone for 25 PROSPECT AVENUE

FEMA’s flood map places the mapped point for 25 PROSPECT AVENUE in zone X.

The state’s 10-foot ground scan puts the lowest cell on this lot at 347.3 feet and the highest at 576.4 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 25 PROSPECT AVENUE

This lot is most likely on septic because it is outside the mapped sewer service area. Please verify.

This lot is within the NJ American Water - Short Hills water system. Please verify with the provider.

These lines come from the state’s sewer service areas and public community water areas, read at a point for this address. That point can fall in the street. Being inside a named area means the lot is inside that mapped system, not that a pipe or a meter is on the house. Being outside means the lot is outside the mapped service area, which is usually a septic system or a private well. It is not a hookup record. Please verify with the provider. How we read water and sewer.

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 $33,402,400 —
2025 $33,402,400 $877,481.05
2024 $21,856,800 $1,023,772.51
2023 $21,856,800 $1,004,975.66

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 $21,856,800 78.22% $27,942,726 — —
2024 $21,856,800 72.06% $30,331,391 0.0% +8.5%
2025 $33,402,400 64.59% $51,714,507 +52.8% +70.5%
2026 $33,402,400 99.99% $33,405,741 0.0% -35.4%

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 $21,856,800 4.598 $1,004,976 $1,004,975.66 —
2024 $21,856,800 4.684 $1,023,773 $1,023,772.51 +1.9%
2025 $33,402,400 2.627 $877,481 $877,481.05 -14.3%
2026 $33,402,400 — — — —

Where your money goes

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

Schools
$543,791 62.0%
County
$100,207 11.4%
Municipal
$233,483 26.6%

Of the estimated decrease of $687,087, the school portion moved $423,876 down, the county portion $77,494 down, and the municipal portion $185,717 down. Those are pieces of the dollar change. They are not a change in each share of the rate.

District school (1.628)$543,791
County (0.287)$95,865
County open space (0.013)$4,342
Municipal purpose (0.665)$222,126
Municipal open space (0.006)$2,004
Municipal library (0.028)$9,353

Property details

Class4A — Commercial
Building class10 — not listed in the state appraisal manual
Building2.5SF4G
Land description189.03 AC
Dwellings2
Commercial units—
Year built1893
Acreage189.03
ZoningR-2 — town zoning code
Tax map page0075
Additional lots49
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale—
Deed book / page—

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.