TAX APPEAL RESOURCES
Property Tax Appeals After a New Jersey Reassessment
A municipal-wide revaluation or reassessment updates property assessments using a common valuation date. An owner may appeal a new assessment when the owner believes it exceeds the property's supportable market value. The assessment, valuation date, property record, market evidence, and filing deadline should be reviewed together.
Reviewed September 2026 | Published by NJ Property Tax Consulting LLC
Who this guide is for
This guide is for New Jersey residential, commercial, industrial, and specialized-property owners who received a new value after a municipal-wide reassessment or revaluation.
What changes in a revaluation or reassessment year
When a revaluation or reassessment is implemented, assessments are intended to reflect full and fair market value as of the applicable October 1 assessment date. In that year, the analysis focuses directly on whether the new assessment is supported by the property's market value.
Why the percentage increase is not the only question
A large increase does not by itself prove the assessment is wrong. A property can increase significantly and still be assessed fairly, or it can have a smaller increase and still be over-assessed. The question is whether the value reflected in the new assessment is supportable for that property.
Why a new assessment may increase
Updated market evidence indicates a higher value
Neighborhood or property-type market conditions changed
Improvements, additions, renovation, or a change in use affected the property
The municipality corrected property data or updated its valuation methods
When a reassessment review may be useful
The new assessment exceeds supportable market evidence
Comparable properties or recent sales suggest a lower value
Condition, damage, deferred maintenance, access, layout, or functional issues are not reflected
Size, use, occupancy, or other property-record information is inaccurate
Income, rent, vacancy, or expense assumptions do not reflect an income-producing property
Evidence to review
New assessment notice and property record
Recent comparable sales close to the assessment date
Purchase and settlement documents
Condition, damage, deferred maintenance, and renovation information
Accurate size, use, occupancy, and physical characteristics
Rent, vacancy, leases, income, expenses, and capitalization evidence for income-producing property
Existing appraisals or valuation reports
The filing deadline may change
The standard deadline is May 1 when a municipal-wide revaluation or reassessment has been implemented. Burlington, Gloucester, and Monmouth Counties use an alternative assessment calendar with a January 15 deadline. Confirm the date for the property's county, municipality, tax year, and assessment type.
This guide provides general information and is not legal, tax, or financial advice. Read New Jersey property tax appeal deadlines.
Frequently asked questions
Can a new assessment be appealed after a town-wide reassessment?
Yes. An owner may appeal when the owner believes the new assessment exceeds the property's supportable market value. The owner still needs credible market or valuation evidence.
Does a large percentage increase prove the assessment is too high?
No. The percentage change alone does not establish market value. The review focuses on whether the new value is supportable as of the applicable assessment date.
What is the standard deadline after a reassessment?
The standard deadline is May 1 when a municipal-wide revaluation or reassessment has been implemented. Alternative county calendars and other assessment types can change the date.
Sources
Request a No-Fee Review of Your Property
Send the property address or block and lot, current assessment, annual tax bill, and any assessment notice or NJPTC letter you received. NJPTC will review the available information and let you know whether additional records are needed. There is no fee for the initial review and no obligation to proceed.