On February 25, the Johnson County Appraiser's Office mailed 222,359 Notices of Appraised Value to residential and commercial property owners across the county. For most homeowners, that single sheet of paper became the only "official" statement of what their house is worth that they'd see all year, and the reactions ranged from mild curiosity to genuine alarm. A Prairie Village homeowner opened his notice to find his assessed value had jumped just over 13 percent and wanted to understand why. In Olathe, a longtime homeowner compared her notice against the actual sale prices of nearby homes listed on the back of the form and found her assessed value sitting higher than what those homes had sold for.
Both were seeking context beyond the notice. Comparing an assessed value with recent sale information can help explain why the figures differ.
Two Different Systems, Two Different Numbers
The county-wide average residential value increase for 2026 was 6 percent, according to the Appraiser's Office's own revaluation report. That's the number that made headlines and kitchen-table conversations across Overland Park, Olathe, Leawood, and every other city in the county.
But look at what actually changed hands. Heartland MLS's local market update for Johnson County put the median sales price at $499,000 in June 2026, up only 2.9 percent year over year. The average sale price rose a similarly modest 2.3 percent, to $583,383, and that average was itself pulled upward by higher-priced closings in Leawood and southern Overland Park. Across the first half of 2026, the countywide median moved from $463,500 to $475,000, a gain nowhere close to the appraiser's 6 percent county-wide figure.
That gap is the real story here, and it's worth understanding for one reason: the two numbers are measuring different things.
The Notice of Appraised Value comes from a mass-appraisal process. Kansas law requires the county to value every property, and the appraiser's office does this using a combination of exterior inspection, an interview process, and a computer model that leans on comparable sales in your area. The Johnson County Appraiser's Office says the appraiser is required to visit your property at least once every six years. It's a model built to value 222,000-plus properties at once, not a professional opinion built around your specific house.
The MLS figure is the opposite. It's the actual price a real buyer agreed to pay a real seller in an arm's-length transaction, closed and recorded. The figures can differ because a mass-appraisal model uses comparable sales, while MLS figures reflect completed transactions during a particular period.
Where the Gap Widens
The size of that gap isn't the same everywhere in the county, and that's the part that actually matters if you're pricing a home or evaluating one to buy this year.
| Price Band | What's Happening in the Market (2026) | What It Means for Trusting Your Notice |
|---|---|---|
| Under $500,000, especially Blue Valley school boundaries | Tightest segment in the county, frequently under two months of supply | Real demand is strong enough that your assessed value may be closer to true market movement |
| $500,000 to $800,000 | Still favors sellers, but with more days on market and less extreme bidding | Some cushion between assessed value and what a buyer will actually pay |
| $800,000 to $1.5 million | More balanced, with buyers negotiating on condition and pricing | Comparable sales thin out here, which is exactly where a computer model is most likely to overshoot |
The pattern makes sense once you think about how a mass-appraisal model works. In the sub-$500,000 tier, there are enough recent closings for the model to track reasonably well. Above $800,000, sales are less frequent and less uniform, homes vary more in finish and lot, and a model built for volume has less reliable data to draw from. In that tier, assessed values may differ from recent sale prices; an individual assessment can also change by a different amount than the countywide median.
If You Already Missed the March Deadline
According to KSHB, the informal appeal window for the 2026 notices closed on Friday, March 27, 30 days after the mailing date. If you're reading this in August, that door looks shut. It isn't.
The Johnson County Appraiser's Office describes Payment Under Protest as another path for property owners. If you pay your own property taxes directly, that deadline falls on December 20. If your taxes are paid through mortgage escrow, you have until January 31. If you're paying your second half or paying late, the window extends to May 10. Roughly 40 to 50 percent of informal appeals result in some reduction, historically.
One detail catches people off guard: the county only allows one protest method per tax year. If you already filed an informal appeal this spring, you can't also file Payment Under Protest in December on the same assessment. But if you did nothing in March, either because the notice didn't seem worth the trouble or because life got in the way, December is your real second chance.
What This Means If You're Listing This Fall
A rising assessed value can feel like validation. It can also lead a seller to price a home based on the county's number rather than what buyers are actually paying nearby. The two aren't interchangeable. A buyer's lender will order an independent appraisal built on actual closed comparables, not on your Notice of Appraised Value, and if your list price leans too heavily on an assessed value that outpaced the real market, you risk a longer time on market or a price reduction that undercuts your original number anyway.
The safer approach is the one the Olathe homeowner already applied to her own notice: look at what homes like yours have actually sold for in the last few months, in your specific pocket of the county, and price from there. In the tightest segments under $500,000, that number may land close to your assessed value. Above $800,000, it may not.
What This Means If You're Buying
The same logic runs in reverse. Don't assume a home is overpriced because the seller's assessed value spiked, and don't assume a home is underpriced because its assessment barely moved. The Notice of Appraised Value tells you what a computer model estimated on January 1. It doesn't tell you what a buyer paid last month for the house down the street, which is the number that should actually inform your offer.
It's also worth knowing that a higher assessed value doesn't automatically mean a higher tax bill for whoever owns the home next. According to AppealDesk, the assessment ratio is set at 11.5 percent of market value for Kansas residential property; your eventual tax bill depends on that ratio multiplied by the mill levy set separately by your city, school district, and other local taxing bodies. Mill levies can and do move in the opposite direction of assessed values, so a 6 percent jump in appraised value doesn't translate directly into a 6 percent jump in taxes.
A Few Questions Worth Answering Directly
Does a higher appraised value always mean higher property taxes? No. Your tax bill is the assessed value, 11.5 percent of market value for residential property in Kansas, multiplied by the mill levy set by your city, school district, and other taxing entities. Those levies can move independently of the appraiser's valuation.
I missed the March appeal deadline. Do I have any options left? Yes. Payment Under Protest lets you challenge the same assessment when you pay your property taxes, with deadlines of December 20 for self-paid taxes, January 31 for mortgage-escrowed taxes, and May 10 for second-half or late payments.
Can I file both an informal appeal and Payment Under Protest? No. Johnson County allows one protest method per tax year. If you already used your informal appeal in the spring, you'll need to wait until next year's notice to try Payment Under Protest.
The Number That Actually Matters
A Notice of Appraised Value is one source of information, but not a replacement for knowing what your specific home, in your specific pocket of Johnson County, would actually sell for today. That number comes from real, recent, comparable closings, not a countywide average or a county appraisal.
If you're weighing whether to list this fall, thinking about what a rising assessment really means for your equity, or trying to figure out whether a home you're eyeing is priced to the market or to someone's tax notice, The Benjamin Team can walk through the actual comparable sales in your neighborhood, not the model's estimate of them. Request a free consultation and home valuation, and get a number built on what buyers are really paying in Johnson County right now.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
