Nassau County Assessment Review Dates

School
2018/19
2019/20 
 2020/21
2021/22
2022/23
Town/County
2019
2020
 2021
2022
2023
Tax status date
Jan. 2, 2017
Jan. 2, 2018
 Jan. 2, 2019
Jan. 2, 2020
Jan. 4, 2021
Tentative roll
Jan. 2, 2017
Jan. 2, 2018
 Jan. 2, 2019
Jan. 2, 2020
Jan. 4, 2021
Grievances due
Mar. 1, 2017
Mar. 1, 2018
 Mar. 1, 2019
Mar. 2, 2020
Mar. 1, 2021
Final roll
Apr. 1, 2018
Apr. 1, 2019
 Apr. 1, 2020
Apr. 1, 2021
Apr. 1, 2022
Petitions due
Apr. 30, 2018
Apr. 30. 2019
 Apr. 30, 2020
Apr. 30, 2021
May 2, 2022
School tax bills
Oct. 1, 2018
Oct. 1, 2019
 Oct. 1, 2020
Nov. 2021
Oct. 3, 2022
Town tax bills
Jan. 1, 2019
Jan. 1, 2020
 Jan. 1, 2021
Dec.  2021
Nov. 1, 2022