Nassau property owners will have until April 30 to file grievances with the county's Assessment Review Commission, under a 60-day deadline extension announced Thursday.
The previous deadline was March 1 for the 2022-23 assessment roll released at the start of the year.
Those values, released in the tentative 2022-23 roll, are frozen at the previous year's level.
"This will provide additional breathing room for those who want to fight their property assessment," County Executive Laura Curran said of the extension.
Curran said the extension would help homeowners struggling with the economic effects of the coronavirus pandemic.
Nonetheless, it has become common practice for the county to extend the deadline in recent years.
Majority Republicans on the County Legislature and Curran administration officials have tussled over extensions in years past.
The legislators have sponsored bills to change the deadline for filing challenges, but Curran has favored the grace period approach.
New property values are being mailed this month, and are posted online at mynassauproperty.com, county officials said.
ARC will decide on the challenges by April 1, 2022. Residents will have until May 2, 2022 to file further appeals through a judicial process known as "small claims assessment review," or SCAR.
School tax bills based on that roll are scheduled to be mailed by Oct. 1, 2022.
Also, the Legislature announced this week it would hold a hearing Monday in Mineola, to review the impact of the countywide reassessment on seniors and veterans.