Water damage repair and restoration in O'Fallon, MO
Most water damage calls in O'Fallon, MO come down to plumbing failures, roof leaks and storm water. 49% of O'Fallon's 35,553 homes were built in 2000 or later, so most water damage starts with supply lines, water heaters, appliances and roof or window leaks rather than old pipes. Restoration companies in our network serve 2 O'Fallon ZIP codes in St. Charles County.
Quick answer
For water, fire or smoke damage in O'Fallon, MO, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 2 O'Fallon ZIP codes are covered. In newer homes here, appliance and supply-line leaks are the most common cause.
Census data
O'Fallon homes by the numbers
- Homes
- 35,553
- Median year built
- 2000
- Built before 1960
- 3%
- Owner-occupied
- 80%
Among the 17 Missouri cities with pages on this site, O'Fallon ranks #5 by number of homes and has older housing than 6% of them (median build year 2000). Its share of pre-1960 homes (3%) is below the 17% average for those cities, so appliance and supply-line leaks are a bigger share of calls.
Source: U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates (tables B25034, B25035, B25003); 95,355 residents per the 2024 population estimate.
Local risks
What causes water damage in O'Fallon
Hidden leaks in newer construction
Newer O'Fallon houses often hide water heaters, air handlers and laundry on upper floors or in attics, so a failed fitting or condensate line can soak ceilings and walls below before anyone notices.
Basement flooding
Heavy rain overwhelms sewers and drainage.
Flash flooding
Creeks rise quickly during intense storms.
Seasonal risks, licensing and FEMA history across the state are on the Missouri page.
Common calls
Most requested in O'Fallon
Disaster history in St. Charles County
Since 2000, FEMA has included St. Charles County in 9 major disaster declarations: 5 severe storms, 3 floods, 1 ice storm. The most recent was Severe Storms and Flooding in 2022 (DR-4665).
Source: OpenFEMA disaster declarations, retrieved October 5, 2026.
FAQ
O'Fallon water damage questions
Who do I call for water damage in O'Fallon?
For water, fire or smoke damage in O'Fallon, MO, shut off the water or power if it's safe, then call (833) 462-1975. We connect you with an independent restoration company that serves your ZIP; 2 O'Fallon ZIP codes are covered. In newer homes here, appliance and supply-line leaks are the most common cause.
How old are homes in O'Fallon?
The median home in O'Fallon was built in 2000. About 3% of its 35,553 homes were built before 1960 and 49% in 2000 or later, according to the Census Bureau's American Community Survey. Older homes are more likely to have corroded pipes and drains; newer homes see more appliance and supply-line leaks.
Has St. Charles County had federally declared disasters?
Yes. Since 2000, FEMA has included St. Charles County in 9 major disaster declarations for storms, floods, fires and similar events, most recently Severe Storms and Flooding (2022). Federal assistance is only available for declared events; most water damage is handled through homeowners or flood insurance.
Do you cover all of O'Fallon?
Restoration companies in our network cover 2 O'Fallon ZIP codes. Coverage is set ZIP by ZIP, so enter yours in the ZIP checker or call to confirm a company serves your address.
ZIP codes covered in O'Fallon
63366, 63368
Water damage help near O'Fallon
- Water damage restoration in Saint Peters, MO6 mi
- Water damage restoration in Wentzville, MO8 mi
- Water damage restoration in St. Charles, MO11 mi
- Water damage restoration in Chesterfield, MO12 mi
- Water damage restoration in Wildwood, MO15 mi
- Water damage restoration in Florissant, MO21 mi
- Water damage restoration in St. Louis, MO28 mi
- Water damage restoration in Oakville, MO32 mi
Also covered in St. Charles County: Lake Saint Louis · St. Charles · Saint Peters · Wentzville · Cottleville · Foristell · Flint Hill · West Alton · New Melle · Portage Des Sioux · Augusta · Defiance
Guides for O'Fallon homeowners
Water damage in O'Fallon?
Stop the source if you can, then call. We'll connect you with a local restoration company that serves your ZIP.
Fast callback on emergency requests