Welcome to the WESTWOOD, MA Online Assessment Database for Fiscal Year 2023. Please note the following: State law requires FY2023 tax bills to reflect ownership as of 1/1/2022. State law requires assessments be set using 2021 sales. Tax rates are listed below. Residential Tax Rate $14.30 Commercial Tax Rate $27.63 Industrial Tax Rate $27.63 Personal Property Rate $27.63