state tax rates. Sale-Tax.com data last updated Thursday, April 1, 2021. If no further administrative appeals can be made, you can appeal your Brazoria County tax assessment in court. 2020 assessed values are not on the Brazoria County Appraisal District website on April 26, 2020. The average effective property tax rate in the Lone Star State is 1.69%, well above the national average of 1.07%. The jurisdiction-specific rates shown add up to your minimum combined sales tax rate. These estimates must be recorded without deference to revenue hits. _W.themePlugins = []; _W.recaptchaUrl = "https://www.google.com/recaptcha/api.js";