Important Dates

January 1Assessment DateAll property is assessed as it existed on this date.
January 31Property Taxes Due - First InstallmentThe first installment of property taxes is due to the Rock County Treasurer.
March 1Statement of Personal Property DueForm PA-003 must be received by the Assessor.
March 1Property Tax Exemption Request DueForm PR-230 must be received by the Assessor.
AprilStatement of AssessmentAssessment notices are mailed if the assessed value on a property changed from one year to the next.
March - MayOpen BookThe assessor will hold an open book session to meet with residents.  
May - JuneBoard of ReviewMust meet once within in a 30-day period beginning the 2nd Monday in May.
July 31Property Taxes Due - Second InstallmentThe second installment of property taxes is due to the Rock County Treasurer.
August 15Equalized Values EstablishedSet by the Wisconsin Department of Revenue.
DecemberTax BillsTax bills are required to be mailed by the third Monday in December.