NJ Property Tax Appeal Deadline 2026: April 1 vs. May 1 — Which Applies to You?

The Two NJ Appeal Deadlines

New Jersey has two property tax appeal deadlines for 2026, depending on whether your municipality underwent a full revaluation:

• April 1, 2026 — standard deadline for all other NJ municipalities.
• May 1, 2026 — extended deadline for 26 municipalities that completed a revaluation in 2025–2026.

Most NJ homeowners fall under the April 1 deadline. If you are reading this in March 2026, you need to act quickly.

What Is a Revaluation?

A revaluation is when a municipality completely reassesses every property from scratch, typically after many years without a full reassessment. Reval years reset the assessment-to-market-value ratio back to 100% and often result in large jumps in assessed value for homeowners.

Because revaluations generate the most appeals, NJ law extends the deadline by one month — to May 1 — for municipalities in a reval year. See our full guide to how NJ revaluations work.

The 26 Reval Towns (May 1 Deadline)

For 2026, the following municipalities have a May 1, 2026 appeal deadline:

• Bergen County: Allendale, Carlstadt, Closter, Cresskill, Dumont, East Rutherford, Englewood, Fairview, Hasbrouck Heights, Leonia, Little Ferry, Lyndhurst, Maywood, Moonachie, Northvale, Norwood, Old Tappan, Palisades Park, Paramus, Ramsey, River Edge, Washington, Wood-Ridge, Woodcliff Lake
• Essex County: Cedar Grove, Glen Ridge, Verona
• Hudson County: Union City
• Passaic County: Paterson

If your town is not on this list, your deadline is April 1, 2026.

How to Confirm Your Deadline

The simplest way: enter your address at propgap.ai. We automatically detect whether your municipality is a reval town and show you the correct deadline. You can also check your county tax board's website or call your local assessor's office directly.

What Happens If You Miss the Deadline?

Missing the deadline is generally fatal to an appeal. The County Board of Taxation has no authority to extend it, and you cannot file a new appeal for the same tax year once it has passed. The only recourse is the NJ Tax Court under very narrow circumstances (such as a new assessment notice received after the original deadline).

This is not a deadline to treat casually. The April 1 and May 1 dates are hard cutoffs set by statute.

Standard Deadline Towns: Act Now

If your town has the April 1 deadline, you have very little time left. The appeal process requires gathering comparable sales evidence, completing Form A-1, and filing with your County Board of Taxation — ideally with time to spare for certified mail delivery.

See our full guide to NJ property tax appeals and how to complete Form A-1. PropGap generates your comparable sales evidence in about 30 seconds.