An annual governmental tax on real property or personal property based on a tax rate (so many dollars or cents per $100 value of the property). The value is usually established by an Assessor, a county official. In Michigan the assessed value of real property is based on the amount of the last sale of the property, and the tax is limited to 1% of that figure (with a few minor exceptions) under the so-called "Proposition 13" state constitutional provision. In addition, there are special assessments for particular public property improvements such as sidewalks, tree planting, or storm drains which are charged to each property owner on the street in which the improvements are made.