St. Charles County, MO real estate

What the numbers say

St. Charles County, MO real estate at a glance

By AstroCore · Realtor.com, US Census and Freddie Mac data

In September 2026, the median home in St. Charles County listed for $417,675, about the same as a year earlier. That is 39% above the Missouri median of $300,000.

Homes spent a median of 44 days on the market, faster than 47 days a year ago. That makes St. Charles County the #2 fastest-selling of 21 Missouri counties we track.

Homeowners in St. Charles County pay a median of $3,480 a year in property taxes on a median home value of $320,800, an effective rate of about 1.08%. The Missouri average is 0.85%, which makes St. Charles County the #112 lowest-tax of 115 counties in the state with published tax data.

Renters pay a median of $1,370 a month, and $1,328 for a two-bedroom. At today's prices a typical home costs about 25 times a year's rent, which generally favors renting over buying in the short term.

With 20% down and today's 7.24% average 30-year rate, the monthly payment on a $418,000 home here comes to about $2,829 including property tax and insurance. Lenders typically want that to be under 28% of income, which works out to roughly $121,000 a year (the median household here earns $104,692).