128 FAIRMOUNT AVE

Chatham Boro, Morris County · Block 95, Lot 2

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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)
+413.3%

Estimated tax up $41,542 ($10,052 → $51,595) using 2024→2025 rates (1.619 → 1.701) × assessed net.

Assessment net change: +388.5% ($620,900 → $3,033,200).

Assessment

Land$573,900
Improvements$2,459,300
Net (taxable assessed, 2026)$3,033,200
Town avg ratio used83.67% (Average ratio (Director’s / Chapter 123))
Implied equalized value$3,625,194
2025 tax (MOD-IV billed)$51,594.73
Est. 2025 tax @ general rate$51,595
Mailing address (2026)7 VETERANS CT, WALLINGTON; NJ, 07057

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 2023 sale of $880,000: implied equalized value $3,625,194 is $2,745,194 above that sale. This is not an appraisal.

This class 2 — residential (four families or less) — net assessment sits above the town class-2 average of $1,004,213.

Building permits for 128 FAIRMOUNT AVE

The New Jersey construction-permit file lists 6 permits for 128 FAIRMOUNT AVE in Chatham Boro. Permit C24-213, a new building, was issued 30 May 2024 and closed 20 May 2026 with a Certificate of Occupancy. The reported cost is $744,000. The reported size is 4,533 square feet.

Permit Type Use Issued Closed Reported cost
C23-221 Demolition Accessory buildings and miscellaneous structures 12 May 2023 30 May 2023, Certificate of Approval $1,000
C23-568 Demolition International Residential Code 27 Oct 2023 30 Apr 2026, Certificate of Approval $18,000
C23-614 Alteration Accessory buildings and miscellaneous structures 28 Nov 2023 30 Apr 2026, Certificate of Approval $500
C24-213 New International Residential Code 30 May 2024 20 May 2026, Certificate of Occupancy $744,000
C24-213+A Alteration International Residential Code 14 Apr 2026 20 May 2026, Certificate of Approval $35,600
C24-213+B Alteration International Residential Code 21 Apr 2026 20 May 2026, Certificate of Approval $2,945

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 Chatham Boro construction office.

Flood zone for 128 FAIRMOUNT AVE

FEMA’s flood map returned no flood zone at the mapped point for 128 FAIRMOUNT AVE.

The state’s 10-foot ground scan puts the lowest cell on this lot at 357.2 feet and the highest at 384.5 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 128 FAIRMOUNT AVE

This lot is within the Molitor WPCF Madison Chatham Joint Meeting STP sewer system. Please verify with the provider.

This lot is within the Chatham WD 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 $3,033,200 —
2025 $620,900 $51,594.73
2024 $620,900 $10,052.37
2023 $620,900 $9,648.79

Mailing changed in 2024 to 7 VETERANS CT, WALLINGTON; NJ, 07057.

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 $620,900 73.99% $839,167 — —
2024 $620,900 98.05% $633,248 0.0% -24.5%
2025 $620,900 89.96% $690,196 0.0% +9.0%
2026 $3,033,200 83.67% $3,625,194 +388.5% +425.2%

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 $620,900 1.554 $9,649 $9,648.79 —
2024 $620,900 1.619 $10,052 $10,052.37 +4.2%
2025 $620,900 1.701 $10,562 $51,594.73 +5.1%
2026 $3,033,200 — — — —

Where your money goes

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

Schools
$32,789 63.6%
County
$8,068 15.6%
Municipal
$10,738 20.8%

Of the estimated increase of $41,542, the school portion moved $26,450 up, the county portion $6,497 up, and the municipal portion $8,595 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

Regional / consolidated school (1.081)$32,789
County (0.259)$7,856
County open space (0.007)$212
Municipal purpose (0.317)$9,615
Municipal library (0.037)$1,122

Property details

Class2 — Residential (four families or less)
Building class17 — Above standard quality single-family dwelling
Building1SF G1
Land description115X248
Dwellings1
Commercial units—
Year built2025
Acreage0.6547
ZoningR-1 — town zoning code
Tax map page—
Additional lots—
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale$880,000 · 7/6/2023 · sale assessment $620,900
Deed book / page24646 / 01200

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.