How to appeal a property tax assessment in Bergen County, NJ

Who can appeal, and where do I file?

New Jersey’s appeal statute, N.J.S.A. 54:3-21, allows “a taxpayer or a taxing district” to challenge an assessment; in practice, nearly every Bergen County appeal is filed by the property owner. It starts at the Bergen County Board of Taxation, using Form A-1, Petition of Appeal. You may instead file directly with the Tax Court of New Jersey — bypassing the county board — only if the assessed valuation of the property under appeal exceeds $1,000,000 (or, for an added or omitted assessment specifically, $750,000). Below that threshold, the county board is where you start; its decision can then be appealed to the Tax Court within 45 days of the judgment’s mailing date.

What’s the deadline for a Bergen County appeal?

File on or before April 1 of the tax year, or 45 days from the date the municipality completes its bulk mailing of assessment notices, whichever is later. In a municipality that has just completed a municipal-wide revaluation or reassessment, the deadline moves to May 1 instead. If the last filing day falls on a Saturday, Sunday, or legal holiday, it moves to the next business day. A separate, shorter calendar (deadline: January 15) applies only in Burlington, Gloucester, and Monmouth Counties under the state’s Assessment Demonstration Program — Bergen County is not part of that program and follows the standard April 1/May 1 calendar. An appeal received after the close of business on the deadline is dismissed as untimely, with no exception for a late postmark.

Bergen County’s own board confirms the 2026 filing window has already closed. The statute applies the same way every year, so for tax year 2027 the deadline is on or before April 1, 2027, or May 1, 2027 in a town completing a revaluation or reassessment that year, unless a municipality’s bulk mailing of assessment notices runs later than that — in which case the deadline is 45 days after the mailing. Confirm the exact date and that year’s certified ratios before filing; both are republished annually.

How do I file with the Bergen County Board of Taxation?

File Form A-1, Petition of Appeal, either through the county’s online filing system at taxappeal-nj.com, or on paper, hand-delivered or mailed to the Bergen County Board of Taxation (Two Bergen County Plaza, 1st Floor, Hackensack, NJ 07601-7076; 201-336-6300) — paper petitions aren’t accepted by fax or email. A copy must also be served on the municipal assessor and the municipal clerk. Filing fees are set by the state and scale with the current assessed value:

Fees are non-refundable and payable to the County Tax Administrator; there’s no fee to contest a denied veteran’s or senior/disabled deduction. Separate parcels need separate petitions unless the county board’s administrator approves consolidating them. If you’d rather skip the hearing, Form A-1 lets you request a “summary hearing” decided on the paper record alone — but if an appraisal report is part of the evidence, the appraiser and the taxpayer (or the taxpayer’s attorney) must still appear to testify. Missing your hearing without an approved postponement generally ends the appeal for “lack of prosecution” and can also block a further appeal to the Tax Court.

What evidence does the county board weigh?

The county board must presume your current assessment correct until you overcome that presumption, and the burden of proof is yours. The strongest evidence is comparable sales — up to five, each identified by block/lot, sale price and deed date, at or near October 1 of the pretax year (the annual assessment date) — filed with the petition or delivered to the assessor and board at least seven calendar days before the hearing. Photographs of the subject property and the comparables help illustrate the argument. One rule trips people up every year: the assessment of a similar house down the street is not admissible evidence of value — only an actual sale is. If you’re relying on an appraiser’s report, that written report is due to the tax administrator, every board member, and the opposing party at least seven calendar days before the hearing, and the appraiser must appear to testify. Owners of income-producing property must also submit an itemized income-and-expense statement. Adjournments are granted only for extraordinary reasons, so plan to attend.

What is the Chapter 123 “common level range” test?

New Jersey doesn’t require every assessment to sit at exactly 100% of market value in a non-revaluation year — it allows a band. Each fall, the Division of Taxation certifies an “average ratio” for every municipality (the assessment-to-true-value ratio implied by that town’s own recent sales), plus a common level range running 15% above and below it. The board reduces your assessment only if your property’s own ratio (assessment ÷ true value, as you prove it) falls outside that range. The rule works the same way in reverse: a ratio that falls below the lower limit is also revised to the average ratio, which raises rather than lowers the assessment. The Division’s own published example uses round numbers: assume a town’s average ratio is 95.41%. A property with a true value of $100,000 carries an assessment of $110,000 — a 110% ratio, above the upper limit. Because the ratio exceeds the range, the assessment is revised to the average ratio applied to true value: $100,000 × 95.41% = $95,410. If your ratio instead falls inside the range, Chapter 123 gives you no relief even if your true-value argument is otherwise sound. For tax year 2026, the Division certified Alpine’s average ratio at 85.82% (range 72.95%–98.69%) and Demarest’s at 101.41% (range 86.20%–116.62%) — both illustrative only; your own town’s certified ratio, which changes annually, is what applies to your appeal.

If I win my appeal, how long does the new assessment last? (The Freeze Act)

Under the Freeze Act (N.J.S.A. 54:3-26 for a county board judgment, N.J.S.A. 54:51A-8 for a Tax Court judgment), a final judgment that isn’t further appealed is binding on the assessor and the municipality for the assessment year decided and the two tax years after it — normally locking in your new assessment for three years running. Three things can end the freeze early: a change in the property’s value, an added assessment, or a municipal-wide revaluation or reassessment in your town. You can also end it yourself by filing another appeal.

What about added or omitted assessments?

New construction, additions, and improvements completed during the year are captured by an “added assessment” so the property doesn’t skip its share of that year’s taxes; an “omitted assessment” corrects a prior year’s assessment that was, by error, never placed on the property at all. These run on their own calendar, separate from the regular April 1 cycle: the state’s own Form AA-1 states appeals must be filed on or before December 1, and hearings are generally held between that filing deadline and the following January 1. The direct-to-Tax-Court threshold for an added or omitted assessment is lower than the regular threshold — $750,000 in assessed value, rather than $1,000,000.

How does a revaluation year change the math?

Property tax rates in the Northern Valley covers what a municipal-wide revaluation or reassessment does to a town’s tax rate. Five of the towns that page covers — Closter, Cresskill, Edgewater, Norwood, and Old Tappan — are on the New Jersey Division of Taxation’s approved list of 2026 revaluations and reassessments; so are roughly three dozen other Bergen municipalities this year (the county board’s certified-ratio table flags each one with an “R”). For an appeal, a revaluation matters twice over. First, it moves your filing deadline from April 1 to May 1. Second, it resets the math: a revaluation or reassessment is meant to bring every assessment in town back to 100% of true value, so in the year it takes effect the town’s ratio is treated as 100% and the prior year’s common level range no longer describes it — the Chapter 123 comparison you’d have made the year before doesn’t carry over. Check the Division’s current-year approved list, or your own municipality’s certified ratio, to see whether this applies to your town before assuming last year’s numbers still apply.

What should a buyer or seller know about the assessment?

Assessments are public record: the Bergen County Board of Taxation’s Property Record Search looks up any parcel by municipality, block, and lot. The Division of Taxation’s own description of how assessments are administered names three mechanisms that change an assessment: a municipal-wide revaluation or reassessment, an added assessment for new construction or improvements, and an omitted assessment that corrects a prior year’s error. Before relying on either figure, compare the property’s current assessment to its actual sale price — the two describe different things, and only the assessment is what the tax bill is calculated from.

Is this page legal or tax advice?

No. This is general information about the Bergen County appeal process, not legal or tax advice, and it doesn’t evaluate any specific property. Questions about a specific assessment or appeal belong with the municipal assessor, the county board, or an attorney.