Missouri's SB 190 property tax freeze is real and Jackson, Clay, Platte, and Cass counties have all adopted it — apply, and your bill stops climbing at whatever amount you're assessed the year you apply. What the freeze does not do is fix the assessed value itself. In Jackson County, that distinction mattered enormously in 2023, when assessed values spiked an average of 30% before anyone had a chance to freeze anything.
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Talk to a Specialist →Notice what's missing from that sequence: nothing in it corrects an assessment that was too high to begin with. If your home gets assessed during a spike year, the freeze locks in the spike, not the pre-spike number. For most buyers moving into the metro fresh, this is a non-issue — but it's exactly what happened to existing Jackson County homeowners in 2023, and it's worth understanding before you close in a county with an active, unresolved reassessment fight.
Jackson County assessed values spike an average of 30% metro-wide. A class-action lawsuit follows almost immediately, arguing the county's process itself was unlawful.
The State Tax Commission issues orders on the disputed assessments. County Executive Frank White vetoes rollback measures aimed at capping the damage.
Frank White is recalled from office — a direct consequence of how the assessment crisis was handled.
The county caps 2025 increases at 15%, a partial rollback from the original 30% spike.
The next scheduled reassessment cycle. Local experts warn values could spike again — the underlying dispute over methodology was never fully resolved, only capped for one cycle.
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SB 190 in Jackson County is genuinely buyer-friendly — apply once, no annual renewal, and the amount locks for good. But "locks" only protects you from future increases; it says nothing about whether the number you're locking in was calculated fairly. A buyer closing in early 2026, before the 2027 reassessment, is applying against the currently-capped, still-disputed number. If 2027 brings another spike the way 2023 did, existing owners take the hit before any freeze applies to the new number — and someone who freezes in late 2026 locks in a lower number than someone who buys after the 2027 reassessment lands.
| County | State | Effective rate | SB 190 status |
|---|---|---|---|
| Platte | MO | ~0.90% | Adopted — Oct 1–Dec 31 window, annual renewal |
| Cass | MO | ~0.95% | Adopted — verify current window |
| Clay | MO | ~1.04% | Adopted — Jan 1–Mar 31, annual affidavit |
| Jackson | MO | ~1.10% | Adopted — apply once, no renewal, but locks a disputed valuation |
| Johnson | KS | ~1.09%–1.27% | No equivalent freeze |
| Wyandotte | KS | ~1.08% | No equivalent freeze |
The other four counties in this metro don't carry Jackson's specific baggage — Clay, Platte, and Cass all have SB 190 without an active lawsuit and recall in their recent history. If the freeze is the main draw and the Jackson County situation gives you pause, Clay County's Northland communities or Cass County's Pickering Place and Alexander Creek get you the same freeze mechanism without the disputed-valuation question mark.
The honest way to shop this metro: don't let "Missouri has the freeze" be the whole analysis. Ask which county, ask what the freeze actually locks in, and if you're looking at Jackson County specifically, read the full assessment-crisis timeline before you assume "frozen" means "settled."
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