The primary purpose of the Assessing Department is to estimate the fair market value, or "true cash value," of all real and personal property located within the Township of Grand Blanc. The department studies the sales market and collects information about properties in order to estimate current market value.

The Assessing Department keeps records on all properties, including land and buildings. The State of Michigan Constitution and Statue require that, notwithstanding, any other provision of law, the assessed values placed upon the assessment roll shall be at 50% of true cash value.

A Notice of Assessment is mailed to each property owner at the beginning of March each year as notice of these values. The only times these values may be appealed is during the March Board of Review. The dates and times of these meetings are on the Notice of Assessment. At the close of the March Board of Review, the values become final and cannot be appealed. (With the exception of Commercial and Industrial Property which may be appealed directly to the Michigan Tax Tribunal by May 31).