Is O Fallon, MO 63366 a buyer’s or seller’s market?
O Fallon is a seller’s market. With about 1.5 months of supply and 54% of recent sales closing above the original list price, competing offers are common on well-priced homes. Buyers here often have a pre-approval in hand and a plan for the appraisal gap before touring.
More competitive than 96% of U.S. ZIP codes, and #14 of 263 in the state.
Based on share sold above original list, sale-to-list ratio, months of supply and days on market for the 3 months ending August 31, 2026. See the breakdown
The O Fallon housing market right now
In the three months ending August 31, 2026, 54% of homes in O Fallon, MO 63366 sold above their list price, the typical home went under contract in 10 days and there were 1.5 months of supply. Under four months of supply means sellers have the edge: expect competition for well-priced homes. That’s based on 189 home sales.
Compared with the same period a year earlier, the share selling over asking rose from 49%, homes sold more slowly (6 days then) and the median sale price rose 10% to $380,835. Overall, O Fallon is more competitive than a year ago, so tougher for buyers.
Within St. Charles County, homes here sell faster than in 64% of the county’s ZIP codes, and sell more often over asking than in any other ZIP code in the county. On our competition score, O Fallon ranks #14 of 263 MO ZIP codes with enough sales (score 92 out of 100).
Nearby, buyers who want less competition could look at Portage Des Sioux 63373 (0% sold over asking) or Foristell 63348 (17% sold over asking).
Run the numbers for 63366
Nearby markets
Augusta 63332Balanced $227 /sq ftDefiance 63341Seller’s market $224 /sq ftForistell 63348Seller’s market $231 /sq ftLake Saint Louis 63367Seller’s market $183 /sq ft Browse all markets →Towns like O Fallon nearby
Find towns like O Fallon in other states →Where O Fallon is
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Questions about O Fallon real estate
Is O Fallon a buyer’s or seller’s market?
A seller’s market: there were 1.5 months of supply in O Fallon, MO 63366 in the three months ending August 31, 2026. Under four months usually favors sellers, and more than six favors buyers.
How fast do homes sell in O Fallon?
The typical home went under contract in 10 days in the latest three months.
Do homes in O Fallon sell over asking?
54% of homes sold above their original list price, and the typical sale closed at 101.6% of the list price.
What are property taxes in O Fallon?
About 1.08% of a home’s value a year in St. Charles County, or roughly $4,320 on a $400,000 home.
What is the median home price in O Fallon?
The median sale price was $380,835 in the three months ending August 31, 2026, about $181 per square foot.
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Market data describes housing activity only. Figures are rolling 3-month values from Redfin and may be revised. Methodology