Of course, the downside of rising property values is rising property tax bills. However, taxes can go up only so much each year because of the Hancock Amendment. Taxing jurisdictions such as school districts and libraries use the assessed values to adjust their tax rates to limit any increase in total revenue collection to a few percentage points. That offsets some impact of large increases in any individual’s reassessment.

As of Wednesday, St. Louis County property owners can go online to check their projected values. Assessors have until July 1 to finalize the tax rolls. Before then, homeowners are encouraged to make sure the details included in their reassessments are accurate, and to contact the assessor’s office if they’re not.

“Our top priority is to get it right,” Zimmerman said in the announcement. “But with hundreds of thousands of properties to appraise, there will always be mistakes. No one knows your property better than you. If you see something, say something — the sooner the better. If our records show more bathrooms than you really have, then we’ll get your home value wrong. That’s not fair, and that’s exactly what we want to fix.”

Residential property owners in St. Louis County can expect a change of assessment notice in the mail by mid-May.