NJ Property Tax Appeal Library
Everything NJ homeowners need to understand property tax appeals — from reading your assessment notice to filing Form A-1 before the deadline.
Check My NJ Assessment FreeEvidence Packet $49 if over-assessed · No gap = no charge
NJ Guide
NJ GuideHow to Read Your NJ Revaluation Notice (Blue Card) — 2026 Guide
Your NJ blue card shows your new assessed value after revaluation. Learn what each field means, what 100% assessment means, and when to appeal.
Read article →NJ Property Tax Appeal Deadline 2026: April 1 vs. May 1 — Which Applies to You?
Most NJ homeowners have an April 1, 2026 appeal deadline. But 26 revaluation towns have a May 1 deadline. Find out which applies to your address.
Read article →How NJ Property Tax Revaluations Work — And Why Your Bill Just Jumped
NJ revaluations reassess every property to 100% market value. Learn what triggers a reval, why values often overshoot, and why reval years produce the most successful appeals.
Read article →NJ Law
NJ LawChapter 123: The NJ Law That Protects You from Unfair Assessments
Chapter 123 (N.J.S.A. 54:51A-6) defines the Common Level Range that boards use to evaluate NJ property tax appeals. Learn how it works and when it helps you.
Read article →NJ Assessment Ratio Explained: What It Is and Why It Matters
The NJ assessment ratio shows how your assessed value compares to market value. Learn how to calculate yours and what an unfavorable ratio means for your appeal.
Read article →Process
ProcessWhat to Expect at a NJ County Board of Taxation Hearing
Learn how NJ County Board of Taxation hearings work, what to bring, what the assessor will argue, and what happens if you win or lose.
Read article →NJ Form A-1 Explained: How to Fill Out the Petitioner Petition
Step-by-step guide to completing NJ Form A-1 (Petition of Appeal), including block/lot, assessed value requested, grounds for appeal, and filing instructions.
Read article →Ready to Check Your Assessment?
All the guides above explain the process. PropGap does the comparable sales research in 30 seconds — free if your home is fairly assessed.