What is the property tax rate in Platte County?

The combined effective property tax rate in Platte County, Missouri is approximately 1.40%.

Platte County Property Tax Calculator (2026) — Missouri Property Tax Almanac

Property Tax in Platte County, 2026

A calculator and field guide for Parkville-area homeowners — and for anyone considering a move to Platte County — including Missouri's 19% residential assessment ratio (constitutionally fixed), Senate Bill 190's senior property tax freeze (age 62+, county opt-in — adopted by ~85 of 114 MO counties), the Missouri Property Tax Credit Claim (refundable up to $1,100), and triennial reassessment (every odd-numbered year).

Platte County, home to Platte City and 110k Missourians, operates under Missouri's constitutionally-fixed property tax system. Residential property is assessed at 19% of fair market value (Mo. Const. Art. X §4(b)); tax = AV × consolidated rate per $100. Reassessments occur every odd-numbered year. Senate Bill 190 (2023) authorizes counties to enact a senior property tax freeze for owners 62+ — and Platte County has adopted this freeze.

How the bill is built

Missouri property tax follows a 3-step calculation. Step 1: Fair Market Value. The Platte County Missouri Assessor's Office determines FMV every odd-numbered year. Step 2: Apply 19% residential assessment ratio. AV = FMV × 19%. Commercial uses 32%; agricultural uses 12%. Step 3: Apply consolidated rate. Tax = AV × consolidated rate ÷ $100. Platte's combined consolidated rate is approximately $7.40/$100 of AV — the effective rate against market value works out to about 1.40%.

SB 190 Senior Property Tax Freeze (county opt-in, age 62+). Missouri's primary senior protection — locks the property tax bill at the year-of-eligibility level. Approximately 85 of Missouri's 114 counties + St. Louis City have adopted SB 190 (including all major metros: St. Louis, Jackson, Clay, Platte, St. Charles, Greene, Boone, Jefferson, Cass). The base year is the year the senior turned 62 AND submitted an application. Future increases (voter-approved bonds, new construction/improvements, Missouri Blind Pension Fund) can still raise the bill. Apply with your county collector / assessor — applications typically open December - March each year.

Missouri does NOT provide a full property tax exemption for 100% disabled veterans — unusual among states. The primary veteran property tax relief is the Missouri Property Tax Credit Claim (MO-PTC), a refundable credit up to $1,100/year (income-tested at $30,000-$34,000). Available to 100% disabled vets, surviving spouses, AND seniors 65+. File Form MO-PTC with your Missouri state income tax return by April 15. Disabled veterans 62+ should file BOTH MO-PTC AND apply for the SB 190 senior freeze if their county has adopted.

Reassessments occur every odd-numbered year — and have produced significant volatility. Missouri's 2023 reassessment cycle produced 30%+ valuation increases in some counties (most-publicized: Jackson County's reassessment, which led to legal challenges). Property owners can appeal to the County Board of Equalization within 30 days of receiving the change of value notice — appeals must include comparable sales evidence, recent appraisals, or condition documentation.

2026 Platte County rate breakdown (consolidated rate per $100 of AV (19% of market value), Platte City district)

Taxing entity	Rate
Combined consolidated rate (~$7.40 / $100 of AV at 19% residential ratio)	7.4000
Combined total	7.4000

As of April 26, 2026 · From Platte County Missouri Assessor's Office.

Note: Platte County is **northwestern Kansas City suburbia** — home to Kansas City International Airport (MCI, a major hub airport that opened in 1972 — substantial portions of the airport actually sit in Platte County). The county is anchored by Parkville (~7K, the picturesque Missouri River town home to Park University), Platte City (~5K, the seat), Riverside (~3K), Weston (~1.7K — a historic 1837-founded town with substantial 19th-century preserved architecture), and the northern KC suburb portions of Kansas City itself. Platte County has experienced rapid suburban growth since 2000 — driven by KC commuter expansion and the Park Hill / Northland area's strong public schools.

Note: Platte County effective property tax rates run approximately **1.40% — among the higher in Missouri**, comparable to Clay County (also northern KC) and St. Louis County. Combined consolidated rates run ~$7.40/$100 of AV. Median home values around $320K (highest in the KC Missouri-side metro) combined with the high rate produce median annual bills around $4,480. Platte County adopted the SB 190 Senior Property Tax Freeze in 2024.

Note: For relocation buyers: Platte County offers **the premium Kansas City Missouri-side suburban** option — Park Hill and Park Hill South school districts are highly rated, and the Parkville / Riverside / KC-Northland corridor offers substantial newer housing. Direct MCI airport access is a meaningful advantage for frequent travelers. The trade-off vs. Johnson County KS (the typical "premium KC suburb" comparison): KS-side schools often score higher in national rankings, but Platte's SB 190 freeze and Missouri's lower income tax provide meaningful retiree advantages.

Deductions and exemptions for 2026

Missouri homeowner property tax relief operates differently than most states. The structural protection is the 19% residential assessment ratio — applied automatically (no application needed). Senior homeowners 62+ should focus on the SB 190 Senior Property Tax Freeze (county opt-in). 100% disabled veterans receive ONLY the partial Missouri Property Tax Credit Claim (MO-PTC) — Missouri does NOT provide a full vet exemption.

The 19% Residential Assessment Ratio (constitutional)

Missouri Constitution Art. X §4(b) fixes residential property at 19% of fair market value for assessment purposes. Commercial property uses 32%; agricultural property uses 12%. This is the structural protection — applied automatically with no application. The constitutional ratio means a home with $300K market value has only $57K assessed value (compared to states with 100% AR where the same home would have $300K AV against the rate).

SB 190 Senior Property Tax Freeze (county opt-in)

Missouri Senate Bill 190 (2023, modified 2024-2025) allows counties to enact a senior property tax freeze. Platte County HAS adopted SB 190. Eligibility: age 62+ as of December 31 of the application year; primary residence in Platte County; owner of record (or trust grantor); responsible for property taxes. Mechanism: base year is the year you became eligible AND submitted an application; bill is locked at the base-year amount. Exceptions (still increase): voter-approved bond indebtedness, new construction or improvements, Missouri Blind Pension Fund. Application: file with the county collector / assessor; application periods typically open December - March each year.

Missouri Property Tax Credit Claim (MO-PTC, refundable)

The MO-PTC provides a refundable credit up to $1,100/year for qualifying owners (or $750 for renters). Eligibility: seniors 65+, 100% disabled veterans (service-connected), surviving spouses of disabled vets, or 100% disabled non-vet. Income limits: $30,000 single / $34,000 married filing jointly for owners (lower for renters). File Form MO-PTC with your Missouri state income tax return by April 15. The credit is refundable — meaning you receive it even if you have no income tax liability. Disabled veterans 62+ should file BOTH MO-PTC AND apply for the SB 190 senior freeze.

Appealing your assessment

Missouri property tax appeals follow a 3-tier process. Level 1: County Board of Equalization (BOE). File a written appeal within 30 days of receiving the change of value notice (notices typically mailed late June - early July in reassessment years, which are odd-numbered). The BOE holds informal hearings — homeowners present comparable sales, recent appraisals, or condition documentation. Level 2: State Tax Commission. If denied, appeal to the State Tax Commission of Missouri within 30 days of the BOE decision. The STC is a quasi-judicial state agency that holds formal evidentiary hearings. Level 3: Circuit Court. STC decisions can be appealed to the county Circuit Court on legal/constitutional grounds. Most Missouri appeals are resolved at Level 1.

Cities and towns in Platte County

Platte County contains 5 incorporated municipalities, ranging from Platte City to the smallest village. Search volume for property tax is often city-specific, so here is the complete list — with population from the 2020 US Census, rounded to the nearest 100.

Data: US Census Bureau, 2020 Decennial Census. Populations rounded. Cities marked as "split" straddle a county border — the portion inside Platte County is subject to Platte County's tax rolls, while the portion outside is subject to the adjacent county's.

City or town	Type	Population (2020)
Kansas City Split	city	510,000
Parkville	city	7,300
Platte City County seat	city	5,000
Riverside	city	3,000
Weston	city	1,700

About city-level property tax rates: The rate breakdown and calculator on this page reflect the Platte City tax district. Other cities in Platte County may pay into different school districts, city rates, and special districts — so their combined rates can differ, sometimes substantially. Always verify the specific rates for your address with the Platte County Missouri Assessor's Office before relying on any estimate.

Frequently asked questions

When are Missouri property taxes due?

Missouri property taxes are due December 31 of the tax year. Platte County bills are typically mailed in November. Late payments accrue interest plus penalty (typically 9% annual interest plus monthly penalty). Most Missouri homeowners pay through escrow via mortgage servicer. Some counties offer optional installment plans — contact your county collector for current options.

What is the SB 190 Senior Property Tax Freeze?

Missouri Senate Bill 190 (2023, modified 2024 and 2025) authorizes counties to enact a senior property tax freeze for owners 62 or older. The freeze locks the property tax bill at the year-of-eligibility level. Platte County HAS adopted SB 190. Eligibility: 62+ as of December 31; primary residence in the county; owner of record (or trust grantor); responsible for property taxes. Exceptions still increase: voter-approved bond indebtedness, new construction or improvements, Missouri Blind Pension Fund. Approximately 85 of Missouri's 114 counties + St. Louis City have adopted SB 190 — including all major metros.

How do I apply for the SB 190 senior freeze in Platte County?

Apply with your county collector / assessor. Application periods vary by county but typically run December - March each year. Required documents typically include: (a) proof of age (driver's license, birth certificate, or other government ID); (b) proof of ownership (deed, trust documents); (c) proof of primary residence (Missouri driver's license with property address; voter registration); (d) prior year's tax bill (establishes base year). The base year is the year you became eligible AND submitted an application. Annual renewal is typically required — file each year by the county's deadline.

Does Missouri have a full property tax exemption for 100% disabled veterans?

No — Missouri does NOT provide a full property tax exemption for 100% disabled veterans. This is unusual among states (most states offer some form of full disabled vet exemption). Missouri's primary veteran property tax relief is the Missouri Property Tax Credit Claim (MO-PTC): a refundable credit up to $1,100/year (income-tested at $30,000-$34,000 depending on filing status). Available to 100% disabled vets, surviving spouses, and seniors 65+. File Form MO-PTC with your Missouri state income tax return by April 15. Missouri's lower aggregate cost of living and SB 190 senior freeze partially offset the lack of full vet exemption — but disabled vets seeking full exemption may want to compare other states (Maryland, Virginia, Iowa, Wisconsin, Pennsylvania, etc.).

How does Missouri's reassessment cycle work?

Missouri reassesses real property every odd-numbered year (the "biennial" reassessment cycle, though "biennial" technically means every 2 years). Reassessments occurred in 2021, 2023, and 2025; the next is 2027. The 2023 cycle produced significant volatility — Jackson County's reassessment showed 30%+ valuation increases in some areas, leading to legal challenges and ongoing political fallout. Property owners can appeal to the County Board of Equalization within 30 days of receiving the change of value notice. Comparable sales evidence is the most-effective basis for appeal.

How do I appeal my Missouri assessment?

Missouri property tax appeals follow a 3-tier process. Level 1: County Board of Equalization (BOE). File appeal within 30 days of receiving the change of value notice (mailed late June - early July in reassessment years). BOE holds informal hearings — present comparable sales, recent appraisals, or condition documentation. Level 2: State Tax Commission of Missouri (STC). If denied, appeal to STC within 30 days of BOE decision. STC is a quasi-judicial state agency that holds formal evidentiary hearings. Level 3: Circuit Court. STC decisions can be appealed on legal/constitutional grounds. Most appeals are resolved at Level 1 — BOE members are often local citizens familiar with neighborhood values.

About Platte County

Beyond the property tax — a few things you might not know about the place.

Weird fact

Weston, Missouri (in Platte County, ~1,700 residents) is **the only Missouri city designated as a National Historic District** — the entire downtown (approximately 22 blocks) is listed on the National Register of Historic Places. Weston was founded in 1837 as a Missouri River steamboat town and was the second-largest port on the Missouri River by 1855 (after St. Louis). The town's economic peak ended when the Missouri River channel shifted away from the original Weston riverfront in the 1880s — preserving the town in something of a 19th-century time capsule. Weston is also home to McCormick Distilling Company (founded 1856, oldest continuously-operating distillery west of the Mississippi River) and the Pirtle Winery (an early Missouri winery established 1978).

Hometown hero

David Cook

The American singer (born 1982), winner of American Idol Season 7 (2008), was born in Houston but raised primarily in Blue Springs, MO (Jackson County) and has significant Platte County connections through his Park University attendance (Parkville, Platte County). Cook's post-American Idol career has included multiple albums (David Cook, This Loud Morning, Digital Vein, Chromance), a successful Broadway run in Kinky Boots (2018-2019), and the role of Charlie Price in the international touring production. Cook is one of the most-successful American Idol winners by post-show career success.

Biggest annual event

Platte County Fair + Weston Christmas Festival

The Platte County Fair (annual, late July at the Platte County Fairgrounds in Platte City, since 1880 — making it one of the oldest county fairs in Missouri) draws 50,000+ attendees over a 5-day run with livestock competitions, agricultural exhibits, demolition derbies, and country music concerts. The Weston Christmas Homes Tour and Christmas Festival (annual, early December in historic Weston) features Victorian-themed window displays in 19th-century downtown Weston, candlelight tours of 1850s-era homes, and traditional Missouri River Valley Christmas programming — drawing 25,000+ attendees.

Property Tax in Platte County, 2026