Curran: Nassau Property Assessment Grievance Deadline Extended


Nassau County Executive Laura Curran recently announced that the Assessment Review Commission (ARC) will extend the property assessment grievance deadline until Monday, April 30, by providing an additional 60-day grace period.

“To continue our efforts to provide property owners with the time and resources they need to fully understand the reassessment process and its results, I have asked the Assessment Review Commission to extend the grievance deadline to April 30,”
said Curran.

The grace period provided last year by ARC, enjoyed bipartisan support from the county executive and County Legislature.

Homeowners who believe that their assessed value for the 2020-21 tax year is inaccurate can file an “Application for Correction of Assessment” with ARC before the close of the grievance filing period which is extended from March 1 to April 30.

Tentative assessed values for the 2020-21 tax year for every Nassau County property have been finalized and posted online at In addition to being posted online, Nassau County property owners will receive in the mail by Jan. 31, a Notice of Tentative Assessed Value.

“Challenging your assessment is a simple process that can be done directly by the property owner in just a few minutes. There are many resources including a five-minute instructional video, ‘How to Appeal Your Assessment,’ to walk filers through the process,” said ARC Chairwoman Robin Laveman. “We will also be holding joint community meetings with the County Legislators and the Department of Assessment to address residents’ concerns and answer questions.”

ARC applications can be obtained online at There is no fee to file an “Application for Correction of Assessment” with Nassau County. For individuals who do not have Internet access, the application can be obtained in person at ARC located at 240 Old Country Rd., in Mineola, or by contacting ARC at 516-571-3214.

The extension of the grievance period will be highlighted on ARC’s website. Property owners are encouraged to check ARC’s website for up to date information.

Curran encourages residents with additional questions or in need of further clarification on the reassessment process and their property’s tentative value to make an appointment at one of the Department of Assessment’s satellite offices which will remain open until Jan. 31. Residents can make their appointments at

Approximately 1,160 property owners have appointments scheduled for January and more than 7,000 appointment slots are still available.

—Submitted by Nassau County

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