200-500 JEFFERSON PARK

Hanover Twp, Morris County · Block 3601, 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)
+1.3%

Estimated tax up $27,664 ($2,074,809 → $2,102,473) using 2024→2025 rates (2.025 → 2.052) × assessed net.

Assessment net change: 0.0% ($102,459,700 → $102,459,700).

Assessment

Land$19,715,800
Improvements$82,743,900
Net (taxable assessed, 2026)$102,459,700
Town avg ratio used69.39% (Average ratio (Director’s / Chapter 123))
Implied equalized value$147,657,732
2025 tax (MOD-IV billed)$2,195,711.37
Est. 2025 tax @ general rate$2,102,473
Mailing address (2026)300 JEFFERSON PARK, WHIPPANY; NJ, 07981

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.

The stored sale is not used for a change-since-sale figure. SR1A 26 — Not a willing-buyer, willing-seller sale, for a reason outside the other codes marks it non-usable, or the price is a nominal amount.

Building permits for 200-500 JEFFERSON PARK

The New Jersey construction-permit file lists 25 permits for 200-500 JEFFERSON PARK in Hanover Twp. 6 are still open in the state file. Permit 20180668, a new building, was issued 4 Oct 2018 and closed 11 Jan 2023 with a Temporary Certificate of Occupancy. The reported cost is $16,712,600. The reported size is 332,337 square feet.

Permit Type Use Issued Closed Reported cost
20170895 Alteration Business Uses 6 Nov 2017 11 Jan 2023, Temporary Certificate of Occupancy $521,000
20170997 New Storage building, low hazard 13 Dec 2017 11 Jan 2023, Temporary Certificate of Occupancy $14,477,000
20180216 New Lecture halls, Art Galleries, Churches, etc. 4 Apr 2018 11 Jan 2023, Temporary Certificate of Occupancy $225,000
20180218 New Institutional Adult/Child Day Care for 6+ Occupants 4 Apr 2018 11 Jan 2023, Temporary Certificate of Occupancy $180,000
20180338 Alteration Restaurants, Night Clubs, Dance Halls, and similar 16 May 2018 11 Jan 2023, Temporary Certificate of Occupancy $1,271,350
20180668 New Storage building, low hazard 4 Oct 2018 11 Jan 2023, Temporary Certificate of Occupancy $16,712,600
00020210400U Alteration Business Uses 1 Jul 2021 Open in the state file $2,925
000020210400 Alteration Business Uses 1 Jul 2021 Open in the state file $94,685
000020220542 Alteration Business Uses 2 Sep 2022 Open in the state file $44,844
20230129 Alteration Business Uses 8 Mar 2023 11 Sep 2023, Certificate of Approval $2,000
20230179 Alteration Business Uses 3 Apr 2023 Open in the state file $94,000
20230472 Alteration Business Uses 21 Aug 2023 26 Jun 2024, Certificate of Approval $1,335,885
20230471 Alteration Business Uses 21 Aug 2023 26 Jun 2024, Certificate of Approval $411,781
20230470 Alteration Business Uses 21 Aug 2023 26 Jun 2024, Certificate of Approval $271,068
20230473 Alteration Business Uses 21 Aug 2023 26 Jun 2024, Certificate of Approval $1,195,538
20240139 Alteration Business Uses 4 Mar 2024 28 May 2024, Certificate of Approval $250,000
20240381 Alteration Business Uses 20 Jun 2024 25 Jun 2024, Certificate of Approval $1,438
20240380 Alteration Business Uses 20 Jun 2024 25 Jun 2024, Certificate of Approval $1,438
20240398 Alteration Storage building, moderate hazard 25 Jun 2024 31 Dec 2024, Certificate of Approval $466,000
20240397 Alteration Storage building, moderate hazard 25 Jun 2024 31 Dec 2024, Certificate of Approval $466,000
20240735 Alteration Business Uses 8 Nov 2024 19 Jun 2025, Certificate of Occupancy $575,000
20250732 Alteration Business Uses 17 Nov 2025 16 Jan 2026, Certificate of Approval $5,900
20250748 Alteration Business Uses 24 Nov 2025 26 Mar 2026, Certificate of Approval $1,214,750
20250748+1 Alteration Business Uses 6 Jan 2026 Open in the state file $8,000
20260077 Alteration Business Uses 18 Feb 2026 Open in the state file $153,000

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 Hanover Twp construction office.

Flood zone for 200-500 JEFFERSON PARK

The flood map could not be checked for 200-500 JEFFERSON PARK, 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 262.1 feet and the highest at 325.3 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 200-500 JEFFERSON PARK

The water and sewer maps could not be checked for 200-500 JEFFERSON PARK, 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 $102,459,700 —
2025 $102,459,700 $2,195,711.37
2024 $102,459,700 $2,159,850.48
2023 $102,459,700 $2,150,629.11

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 $102,459,700 75.98% $134,850,882 — —
2024 $102,459,700 74.66% $137,235,066 0.0% +1.8%
2025 $102,459,700 76.03% $134,762,199 0.0% -1.8%
2026 $102,459,700 69.39% $147,657,732 0.0% +9.6%

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 $102,459,700 2.005 $2,054,317 $2,150,629.11 —
2024 $102,459,700 2.025 $2,074,809 $2,159,850.48 +1.0%
2025 $102,459,700 2.052 $2,102,473 $2,195,711.37 +1.3%
2026 $102,459,700 — — — —

Where your money goes

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

Schools
$1,236,689 58.8%
County
$323,773 15.4%
Municipal
$542,012 25.8%

Of the estimated increase of $27,664, the school portion moved $28,689 up, the county portion $15,369 down, and the municipal portion $14,344 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

District school (0.790)$809,432
Regional / consolidated school (0.417)$427,257
County (0.307)$314,551
County open space (0.009)$9,221
Municipal purpose (0.509)$521,520
Municipal open space (0.020)$20,492

Property details

Class4A — Commercial
Building class—
Building2S OB 3-3S OB
Land description64.806 AC
Dwellings—
Commercial units—
Year built1990
Acreage64.806
ZoningOBRL — town zoning code
Tax map page36
Additional lots—
Census tract / block—
Special tax codesF02 — Fire district 2
MOD-IV current-year tax—
Last sale$69,000,000 · 5/26/2017 · sale assessment $36,424,400 · SR1A 26 — Not a willing-buyer, willing-seller sale, for a reason outside the other codes
Deed book / page23139 / 00007

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.