Welcome to the WESTWOOD, MA Online Assessment Database for Fiscal Year 2022. Please note the following: State law requires FY2022 tax bills to reflect ownership as of 1/1/2021. State law requires assessments be set using 2020 sales. Tax rates are listed below. Residential Tax Rate $14.83 Commercial Tax Rate $28.99 Industrial Tax Rate $28.99 Personal Property Rate $28.99