Taxation Board

About the Board

Created by the legislature in 1909, Boards of Taxation serve as the supervising taxing authority for their respective counties. County Boards of Taxation are primarily responsible for certifying property tax assessments. Additionally, the Board of Taxation is charged with equalization of assessments for the purpose of county taxes, the yearly production of the abstract of ratables, supervision of municipal assessors,  certification of municipal tax rates and other various tasks and reports. The Board of Taxation also serves as the venue for real property tax assessment appeals filed by the taxpayer against the municipal assessor.

On behalf of the Commissioners of the Union County Board of Taxation, we invite you to browse our website and search our real property tax related links information

Coronavirus Updates

• Effective immediately property tax appeals filings only accepted via regular mail or by filing online.
• The Supreme Court of New Jersey has extended the tax appeal filing deadline to May 1st, 2020 for all municipalities.

Notices

• The Supreme Court of New Jersey has extended the tax appeal filing deadline to May 1st, 2020 for all municipalities.
• The Borough of Mountainside Revaluation for 2020 has been granted an extension to 2021 due to various delays by the township. Your new assessment as a result of the revaluation will not be reflected nor become effective until the tax year 2021. Your assessed value for 2020 will still be based off your 2019 assessed value except where improvements, judgments and few other circumstances resulted in a change. If you have any questions please contact the tax assessor for the Borough of Mountainside at 908-232-2409 or the Borough Clerk at 908-232-2400.

Contact Information 

Commissioners