New Jersey Property Tax

New Jersey has among the highest property tax bills in the country and one of the most rule-bound appeal systems. Assessments are set annually at full market value as of October 1 of the prior year, appeals are due April 1 — filed and received, not just mailed — and the state’s signature mechanism is the Chapter 123 test: an assessment outside 15% of the district’s average ratio is presumptively wrong and gets adjusted automatically.

In this section

• The Chapter 123 test and the common level range — the ±15% band around the certified average ratio, and why the winning argument can be arithmetic rather than market evidence.
• The appeal process and the April 1 deadline — Form A-1, the county boards, the May 1 and January 15 variants, and the 45-day Tax Court window.
• New Jersey property tax deadlines — the annual calendar from October 1 through the Tax Court window.

Who does what

• The municipal assessor values property as of October 1 of each year.
• The County Board of Taxation (one per county) receives petitions of appeal, holds hearings, and issues judgments.
• The Tax Court of New Jersey hears direct appeals of assessments over $1 million — and appeals of county board judgments.
• The Division of Taxation certifies the average ratio for every taxing district each year — the number the Chapter 123 test turns on.

The deadlines: April 1, with two deviations

A petition of appeal (Form A-1 with the comparable-sales attachment) must be filed and received by April 1 with the County Board of Taxation. Two statewide variations exist: May 1 where the municipality undertook a revaluation or reassessment, and January 15 in Burlington, Gloucester and Monmouth Counties, which follow an alternative assessment calendar. The appeal process page walks through the filing and what follows it.

Finding your property

New Jersey property records are municipal — each of the 565 municipalities keeps its own assessment records, and each county tax board publishes its forms and hearing calendars. The Division of Taxation’s Local Property Branch pages are the state-level entry point, and the certified average ratios are published district-by-district each year for the Chapter 123 test.

What this does not cover

Farmland assessment, exemption programs, and the municipal revaluation processes themselves are not covered here in detail. AssessCheck has no data connection to any New Jersey municipality, county board, or the Division of Taxation.