A research group is estimating that property taxes are going up an average of 4.2 percent statewide. The Wisconsin Taxpayers Alliance says school districts are raising their taxes by an average of 6 percent statewide. Technical colleges are raising them by 3.9 percent and counties are raising levies by 3.2 percent. The group says complete data is not available for municipalities, but is estimating a 3.2 percent hike. The group warned that individual bills could be much higher or lower than that depending on where they live.