2433 OLD STONE MILL DR

East Windsor Twp, Mercer County · Block 5, Lot 22.1, Qual C2433

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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)
+0.9%

Estimated tax up $49 ($5,703 → $5,752) using 2024→2025 rates (3.596 → 3.627) × assessed net.

Assessment net change: 0.0% ($158,600 → $158,600).

Assessment

Land$60,000
Improvements$98,600
Net (taxable assessed, 2026)$158,600
Town avg ratio used56.62% (Average ratio (Director’s / Chapter 123))
Implied equalized value$280,113
2025 tax (MOD-IV billed)$5,752.42
Est. 2025 tax @ general rate$5,752
Mailing address (2026)2433 OLD STONE MILL DR, EAST WINDSOR; NJ, 08512

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 $310,000: implied equalized value $280,113 is $29,887 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 $260,073.

Building permits for 2433 OLD STONE MILL DR

The New Jersey construction-permit file lists 42 permits for 2433 OLD STONE MILL DR in East Windsor Twp. 38 are still open in the state file. Permit 20260898, an alteration, was issued 4 Aug 2026 and is open in the state file. The reported cost is $10,000.

Permit Type Use Issued Closed Reported cost
000020210781 Alteration International Residential Code 29 Jul 2021 Open in the state file $6,110
000020210804 Alteration Multiple family dwellings, dormitories, etc. 4 Aug 2021 Open in the state file $3,000
000020210808 Alteration Multiple family dwellings, dormitories, etc. 4 Aug 2021 Open in the state file $3,000
000020210807 Alteration Multiple family dwellings, dormitories, etc. 4 Aug 2021 Open in the state file $3,000
000020210806 Alteration Multiple family dwellings, dormitories, etc. 4 Aug 2021 Open in the state file $3,000
000020210805 Alteration Multiple family dwellings, dormitories, etc. 4 Aug 2021 Open in the state file $3,000
000020210936 Alteration International Residential Code 24 Aug 2021 Open in the state file $800
000020211001 Alteration International Residential Code 10 Sep 2021 Open in the state file $1,459
000020220141 Alteration International Residential Code 28 Jan 2022 Open in the state file $2,080
000020220241 Alteration International Residential Code 23 Feb 2022 Open in the state file $2,900
000020220561 Alteration Accessory buildings and miscellaneous structures 9 May 2022 13 May 2022, Certificate of Approval $500
000020220575 Alteration International Residential Code 11 May 2022 Open in the state file $10,109
00020210805U Alteration Multiple family dwellings, dormitories, etc. 3 Aug 2022 Open in the state file $1
00020210808U Alteration Multiple family dwellings, dormitories, etc. 3 Aug 2022 Open in the state file $1
00020210807U Alteration Multiple family dwellings, dormitories, etc. 3 Aug 2022 Open in the state file $1
00020210806U Alteration Multiple family dwellings, dormitories, etc. 3 Aug 2022 Open in the state file $1
00020210804U Alteration Multiple family dwellings, dormitories, etc. 3 Aug 2022 Open in the state file $1
000020221286 Alteration International Residential Code 26 Oct 2022 Open in the state file $1,500
20221364 Alteration International Residential Code 14 Nov 2022 Open in the state file $24,825
20230617 Alteration International Residential Code 3 Jul 2023 Open in the state file $1,631
20231005 Alteration International Residential Code 6 Oct 2023 Open in the state file $3,700
20231150 Alteration International Residential Code 20 Nov 2023 Open in the state file $2,588
20231197 Alteration International Residential Code 4 Dec 2023 Open in the state file $9,300
20240250 Alteration International Residential Code 15 Mar 2024 Open in the state file $10,718
20240408 Alteration Accessory buildings and miscellaneous structures 9 May 2024 17 May 2024, Temporary Certificate of Occupancy $100
20240787 Alteration International Residential Code 15 Aug 2024 Open in the state file $13,790
20240807 Alteration International Residential Code 19 Aug 2024 Open in the state file $8,500
20240983 Alteration Multiple family dwellings, dormitories, etc. 26 Sep 2024 Open in the state file $1,739
20240981 Alteration International Residential Code 26 Sep 2024 Open in the state file $1,739
20240980 Alteration Multiple family dwellings, dormitories, etc. 26 Sep 2024 Open in the state file $1,739
20250159 Alteration One and two family units, 5 lodgers or less each 24 Feb 2025 Open in the state file $5,000
20250159U Alteration One and two family units, 5 lodgers or less each 24 Feb 2025 Open in the state file $1,000
20250566 Alteration International Residential Code 30 Jun 2025 Open in the state file $4,000
20250820 Alteration International Residential Code 8 Sep 2025 Open in the state file $2,809
20250836 Alteration International Residential Code 9 Sep 2025 Open in the state file $1,861
20250968 Alteration Multiple family dwellings, dormitories, etc. 22 Oct 2025 Open in the state file $13,039
20260098 Alteration International Residential Code 22 Jan 2026 Open in the state file $15,800
20260171 Alteration International Residential Code 11 Feb 2026 Open in the state file $2,900
20260455 Alteration International Residential Code 1 May 2026 6 May 2026, Certificate of Approval $100
20260454 Alteration International Residential Code 1 May 2026 6 May 2026, Certificate of Approval $100
20260776 Alteration International Residential Code 15 Jul 2026 Open in the state file $1,700
20260898 Alteration International Residential Code 4 Aug 2026 Open in the state file $10,000

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 East Windsor Twp construction office.

Flood zone for 2433 OLD STONE MILL DR

FEMA’s flood map places the mapped point for 2433 OLD STONE MILL DR in zone X.

The state’s 10-foot ground scan puts the lowest cell on this lot at 86.3 feet and the highest at 86.4 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 2433 OLD STONE MILL DR

This lot is within the East Windsor MUA sewer system. Please verify with the provider.

This lot is within the East Windsor MUA 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 $158,600 —
2025 $158,600 $5,752.42
2024 $158,600 $5,703.26
2023 $158,600 $5,389.23

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 $158,600 79.90% $198,498 — —
2024 $158,600 69.11% $229,489 0.0% +15.6%
2025 $158,600 64.69% $245,169 0.0% +6.8%
2026 $158,600 56.62% $280,113 0.0% +14.3%

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 $158,600 3.398 $5,389 $5,389.23 —
2024 $158,600 3.596 $5,703 $5,703.26 +5.8%
2025 $158,600 3.627 $5,752 $5,752.42 +0.9%
2026 $158,600 — — — —

Where your money goes

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

Schools
$3,554 61.8%
County
$1,461 25.4%
Municipal
$737 12.8%

Of the estimated increase of $49, the school portion moved $24 up, the county portion $17 up, and the municipal portion $8 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

Regional / consolidated school (2.241)$3,554
County (0.800)$1,269
County library (0.074)$117
County open space (0.047)$75
Municipal purpose (0.465)$737

Property details

Class2 — Residential (four families or less)
Building class35 — Average quality row house or townhouse
Building3SFC
Land description.09128 CE
Dwellings1
Commercial units0
Year built1982
Acreage—
ZoningRM — town zoning code
Tax map page1001
Additional lots—
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale$310,000 · 11/14/2025 · sale assessment $158,600 · SR1A 00 — Usable for the sales study
Deed book / page06610 / 01149

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.