1 DIAMOND HILL RD

Berkeley Heights Twp, Union County · Block 3601, Lot 6

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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)
+2.7%

Estimated tax up $37,735 ($1,419,040 → $1,456,775) using 2024→2025 rates (4.287 → 4.401) × assessed net.

Assessment net change: 0.0% ($33,101,000 → $33,101,000).

Assessment

Land$9,614,300
Improvements$23,486,700
Net (taxable assessed, 2026)$33,101,000
Town avg ratio used35.73% (Average ratio (Director’s / Chapter 123))
Implied equalized value$92,642,038
2025 tax (MOD-IV billed)$1,456,775.01
Est. 2025 tax @ general rate$1,456,775
Mailing address (2026)800 W MADISON ST #400, CHICAGO; IL, 60607

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 4 — Transfer of convenience, such as a deed to correct the title marks it non-usable, or the price is a nominal amount.

Building permits for 1 DIAMOND HILL RD

The New Jersey construction-permit file lists 19 permits for 1 DIAMOND HILL RD in Berkeley Heights Twp. 4 are still open in the state file. Permit 25-0527+A, an alteration, was issued 5 Aug 2025 and closed 8 Oct 2025 with a Certificate of Approval. The reported cost is $18,400.

Permit Type Use Issued Closed Reported cost
20-0453 Alteration International Residential Code 31 Jul 2020 20 May 2021, Certificate of Approval $191,225
21-0395+A Alteration Business Uses 26 May 2021 14 Dec 2021, Certificate of Approval $4,500
21-0395 Alteration Business Uses 26 May 2021 14 Dec 2021, Continued Certificate of Occupancy $83,400
21-0409 Alteration Business Uses 2 Jun 2021 24 Mar 2022, Continued Certificate of Occupancy $330,001
21-0395+B Alteration Business Uses 3 Aug 2021 14 Dec 2021, Certificate of Approval $47,900
21-0409+B Alteration Business Uses 12 Aug 2021 24 Mar 2022, Certificate of Approval $25,500
21-0409+A Alteration Business Uses 12 Aug 2021 24 Mar 2022, Certificate of Approval $30,051
21-1000+A Alteration Business Uses 20 Dec 2021 Open in the state file $4,025
21-1000 Alteration Business Uses 20 Dec 2021 Open in the state file $136,100
22-0185+A Alteration Business Uses 21 Mar 2022 11 Dec 2023, Certificate of Approval $6,280
22-0185 Alteration Business Uses 21 Mar 2022 Open in the state file $100,100
22-0747 Alteration Medical, nursing care, for 6+ occupants 21 Oct 2022 1 Mar 2023, Certificate of Approval $3,200
22-0748 Alteration Medical, nursing care, for 6+ occupants 21 Oct 2022 7 Dec 2023, Certificate of Approval $3,200
22-0750 Alteration Medical, nursing care, for 6+ occupants 21 Oct 2022 28 Feb 2023, Certificate of Approval $3,000
23-0711 Alteration Medical, nursing care, for 6+ occupants 13 Oct 2023 1 Feb 2024, Certificate of Approval $44,000
23-0711+A Alteration Medical, nursing care, for 6+ occupants 19 Oct 2023 Open in the state file $23,000
23-0711+B Alteration Medical, nursing care, for 6+ occupants 15 Dec 2023 1 Feb 2024, Certificate of Approval $0
25-0527 Alteration Medical, nursing care, for 6+ occupants 31 Jul 2025 23 Oct 2025, Certificate of Approval $86,000
25-0527+A Alteration Medical, nursing care, for 6+ occupants 5 Aug 2025 8 Oct 2025, Certificate of Approval $18,400

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 Berkeley Heights Twp construction office.

Flood zone for 1 DIAMOND HILL RD

FEMA’s flood map places the mapped point for 1 DIAMOND HILL RD in zone X.

The state’s 10-foot ground scan puts the lowest cell on this lot at 363.7 feet and the highest at 487 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 1 DIAMOND HILL RD

This lot is within the Berkeley Heights Water Pollution Control Plant sewer system. Please verify with the provider.

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 $33,101,000 —
2025 $33,101,000 $1,456,775.01
2024 $33,101,000 $1,419,039.87
2023 $33,101,000 $1,398,517.25

Mailing changed in 2026 to 800 W MADISON ST #400, CHICAGO; IL, 60607.

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 $33,101,000 50.08% $66,096,246 — —
2024 $33,101,000 46.15% $71,724,810 0.0% +8.5%
2025 $33,101,000 41.70% $79,378,897 0.0% +10.7%
2026 $33,101,000 35.73% $92,642,038 0.0% +16.7%

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 $33,101,000 4.225 $1,398,517 $1,398,517.25 —
2024 $33,101,000 4.287 $1,419,040 $1,419,039.87 +1.5%
2025 $33,101,000 4.401 $1,456,775 $1,456,775.01 +2.7%
2026 $33,101,000 — — — —

Where your money goes

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

Schools
$866,253 59.5%
County
$288,641 19.8%
Municipal
$301,881 20.7%

Of the estimated increase of $37,735, the school portion moved $14,233 up, the county portion $15,226 up, and the municipal portion $8,275 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

District school (2.617)$866,253
County (0.836)$276,724
County open space (0.036)$11,916
Municipal purpose (0.833)$275,731
Municipal library (0.079)$26,150

Property details

Class4A — Commercial
Building class—
Building3SB
Land description42.730 AC
Dwellings—
Commercial units—
Year built—
Acreage42.73
Zoning—
Tax map page—
Additional lots—
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale$10 · 10/21/2025 · sale assessment $33,101,000 · SR1A 4 — Transfer of convenience, such as a deed to correct the title
Deed book / page06603 / 02203

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.