One Local Team for Every System in Your Home
O'Fallon sits in St. Charles County, tucked into the northwest corner of the Greater St. Louis area with Interstate 70 cutting right through it. It is a city of steady subdivisions and busy family homes, and that kind of suburban growth puts real demand on the systems inside every house. When the plumbing backs up or the furnace quits on a cold night, you need a company that knows this stretch of Missouri.
That company is Chesterfield Service, and you can reach us at (636) 431-9832. We are family owned and operated, and we have been taking care of homes across the region since 1976. And we built our reputation the way you would hope: honest work, uniformed technicians, and clearly marked trucks that show up when we say we will.
Plumbing You Can Count On
We put plumbing first here for a reason. The homes near Highway K and Highway N deal with hard water, aging supply lines, and sump pumps that get a real workout when spring thunderstorms roll across the county. The Missouri River sits to the south, and heavy rain has a way of finding the low points in a basement.
Here is the problem: plumbing trouble rarely waits for a convenient hour. That is where we come in. Our plumbers handle repairs, installations, and the kind of leak detection that saves a foundation before real damage sets in.
Our plumbing services include:
- Plumbing Repair, Installation, and Maintenance
- Water Heater Repair, Replacement, and Maintenance
- Tankless Water Heater Repair, Replacement, and Maintenance
- Sump Pumps, Bathroom and Kitchen Plumbing
- Water Line Services, Water Softeners, and Water Quality Systems
- Gas Line Plumbing, Piping and Repiping, Leak Detection and Repair
- Foundation Leaks, Backflow Inspection, Commercial and Emergency Plumbing
The good news is our team handles drain work too, from routine cleaning to trenchless sewer repair that spares your yard.
Heating and Cooling for Every Season
O'Fallon runs the full weather calendar. Summers turn hot and humid, and winters bring freeze risk, snow, and ice. A system that coasts through a mild week in April can struggle when August humidity or a January cold snap arrives. And that is exactly when you find out whether your equipment was serviced properly.
We are a Bryant Factory Authorized Dealer and part of the Circle of Champions, so we know these systems inside and out.
Our cooling services include:
- AC Installation, Repair, and Maintenance
- Ductless Mini-Splits
- Heat Pump Repair, Installation, and Maintenance
- Air Balancing and Zone Control Systems
- Commercial HVAC
- Emergency AC
Our heating services include:
- Furnace Repair, Installation, and Maintenance
- Electric Furnace Repair and Replacement
- Gas Furnace Repair and Replacement
- Boilers
- Geothermal Heat Pumps
- Emergency Heating
Electrical Work Done Right
The reality is that a growing suburb keeps adding to its electrical load. New EV chargers, home offices, and updated kitchens all ask more from panels that were sized decades ago. We handle inspections, upgrades, and the safety pieces that protect a family.
Our electrical services include:
- Electrical Inspections, Installation, and Repair
- Electrical Panels and Upgrades
- EV Car Charging
- Indoor and Outdoor Lighting
- Rewiring, Smoke Detectors, and Surge Protectors
- Whole House Generators
- Emergency Electrician
More Than Just Another Service Call
We are licensed, bonded, and insured under License #B00298595, and our work is warranty-backed. Every technician is background-checked and uniformed, and every truck is clearly marked so you know exactly who is at your door.
Even better, our faith-based mission is simple: honor God and serve people. That belief earned us the BBB Torch Award for Ethics and a spot on the St. Louis Post-Dispatch Top Work Places list for 2025. Financing and rebates are available, and our Easy Maintenance Club keeps your systems tuned year round.
We also handle indoor air quality, which matters a great deal in a humid continental climate where windows stay shut for months at a time.
Our indoor air quality services include:
- Air Duct Repair, Installation, and Sealing
- Air Filtration and Air Purifiers
- Dehumidifiers and Humidifiers
- Thermostats and UV Lights
Frequently Asked Questions
Before you call, here is what most people ask.
Do you serve all of O'Fallon?
Yes, and the surrounding communities like St. Charles, St. Peters, Wentzville, and Lake Saint Louis.
Are you available after hours?
We offer 24/7 emergency phone support, with live answering for Easy Maintenance Club members.
Do you handle commercial work?
We do, including commercial HVAC and plumbing.
Schedule Your Home Service in O'Fallon, MO, Today!
From the neighborhoods off I-70 to homes near the county line, we are ready to help with heating, cooling, plumbing, drains, and electrical. Call Chesterfield Service at (636) 431-9832 and let a trusted local team take care of your home.
