A notice of property tax assessment is not a property tax bill. In general, a Notice of Classification, Appraisal and Assessment of Values informs the owner of a value change, or of approval, removal or denial of various exemptions or special assessments. Notices relating to value changes are sent primarily the year after a change is made to a property, after an error is discovered, after the property transfers, or there is a countywide reassessment. Some of the changes that may trigger a notice are new buildings, new improvements, renovations, additions, subdividing property, etc.