Yankton County values rise 11.3% as equalization office outlines appeal timeline and warns of pending state tax bills

Michelle, a member of the Yankton County Equalization Office, told the county commission on March 11 that assessment notices were mailed March 1 and that countywide assessed value rose 11.32% for 2025.

The presentation outlined appeal deadlines: local boards (small towns and organized townships) must receive written appeals by March 13 and meet March 17–20; the county auditor must receive appeals for the city of Yankton and unorganized townships no later than April 1, with the consolidated county board of equalization reviewing cases the week of April 14–17. Michelle said the county typically opens the boards on April 8 and may use a remote call that day because many staff will be attending a spring workshop.

The nut of Michelle’s briefing was how assessments relate to budgets. She said South Dakota property tax is “budget-driven, not rate-based,” and noted state law limits most taxing entities’ annual budget increases to 3 percent plus a growth factor intended to capture new development. The county’s equalization office seeks valuations “at least 85 percent of market value,” she said, and explained methods used to test and…