805 MOUNTAIN AVE

Berkeley Heights Twp, Union County · Block 1715, Lot 27

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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)
+341.5%

Estimated tax up $30,148 ($8,827 → $38,975) using 2024→2025 rates (4.287 → 4.401) × assessed net.

Assessment net change: +330.1% ($205,900 → $885,600).

Assessment

Land$170,400
Improvements$715,200
Net (taxable assessed, 2026)$885,600
Town avg ratio used35.73% (Average ratio (Director’s / Chapter 123))
Implied equalized value$2,478,589
2025 tax (MOD-IV billed)$38,975.26
Est. 2025 tax @ general rate$38,975
Mailing address (2026)805 MOUNTAIN AVE, BERKELEY HEIGHTS; NJ, 07052

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 7 — Substantially improved after the assessment and before the sale marks it non-usable, or the price is a nominal amount.

This class 2 — residential (four families or less) — net assessment sits above the town class-2 average of $322,382.

Building permits for 805 MOUNTAIN AVE

The New Jersey construction-permit file lists 8 permits for 805 MOUNTAIN AVE in Berkeley Heights Twp. 2 are still open in the state file. Permit 24-0350, a new building, was issued 4 Jun 2024 and closed 29 Jul 2025 with a Temporary Certificate of Occupancy. The reported cost is $432,200. The reported size is 8,513 square feet.

Permit Type Use Issued Closed Reported cost
23-0525 Alteration Accessory buildings and miscellaneous structures 16 Aug 2023 30 Aug 2023, Certificate of Approval $0
24-0190 Demolition International Residential Code 19 Mar 2024 Open in the state file $25,000
24-0350+A Alteration International Residential Code 4 Jun 2024 23 Jul 2025, Certificate of Approval $0
24-0350 New International Residential Code 4 Jun 2024 29 Jul 2025, Temporary Certificate of Occupancy $432,200
24-0350+B Alteration International Residential Code 4 Jun 2024 23 Jul 2025, Certificate of Approval $35,000
24-0350+C Alteration International Residential Code 16 Jul 2024 8 May 2025, Certificate of Approval $3,000
24-0350+D Alteration International Residential Code 4 Oct 2024 3 Apr 2025, Certificate of Approval $8,000
25-0835 Alteration International Residential Code 24 Nov 2025 Open in the state file $16,000

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 Berkeley Heights Twp construction office.

Flood zone for 805 MOUNTAIN AVE

FEMA’s flood map places the mapped point for 805 MOUNTAIN AVE in zone X.

The state’s 10-foot ground scan puts the lowest cell on this lot at 289.9 feet and the highest at 318.1 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 805 MOUNTAIN AVE

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 $885,600 —
2025 $205,900 $38,975.26
2024 $205,900 $8,826.93
2023 $205,900 $8,699.28

Mailing changed in 2024 to 300 EXECUTIVE DR #125, W ORANNGE; NJ, 07052.

Mailing changed in 2025 to 300 EXECUTIVE DR #125, W ORANGE; NJ, 07052.

Mailing changed in 2026 to 805 MOUNTAIN AVE, BERKELEY HEIGHTS; NJ, 07052.

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 $205,900 50.08% $411,142 — —
2024 $205,900 46.15% $446,154 0.0% +8.5%
2025 $205,900 41.70% $493,765 0.0% +10.7%
2026 $885,600 35.73% $2,478,589 +330.1% +402.0%

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 $205,900 4.225 $8,699 $8,699.28 —
2024 $205,900 4.287 $8,827 $8,826.93 +1.5%
2025 $205,900 4.401 $9,062 $38,975.26 +2.7%
2026 $885,600 — — — —

Where your money goes

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

Schools
$23,176 59.5%
County
$7,722 19.8%
Municipal
$8,077 20.7%

Of the estimated increase of $30,148, the school portion moved $17,876 up, the county portion $6,022 up, and the municipal portion $6,250 up. Those are pieces of the dollar change. They are not a change in each share of the rate.

District school (2.617)$23,176
County (0.836)$7,404
County open space (0.036)$319
Municipal purpose (0.833)$7,377
Municipal library (0.079)$700

Property details

Class2 — Residential (four families or less)
Building class15 — Average quality single-family dwelling
Building2SF1G
Land description.989 AC
Dwellings1
Commercial units1
Year built2025
Acreage0.989
Zoning—
Tax map page—
Additional lots—
Census tract / block—
Special tax codes—
MOD-IV current-year tax—
Last sale$2,200,000 · 7/23/2025 · sale assessment $885,600 · SR1A 7 — Substantially improved after the assessment and before the sale
Deed book / page06590 / 02762

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.