Serving the Greater St. Louis Metro Area Mad Hatter STL is proud to serve homeowners, real estate agents, and businesses throughout the greater St. Louis metropolitan area. Since 1978, our team of certified chimney and air duct specialists has been the trusted choice for indoor air quality and fire safety services across Missouri and Southern Illinois. Primary Service Regions St. Charles County Our headquarters is located in O'Fallon, MO, placing us at the heart of St. Charle

Since 1978, The Mad Hatter Service Company has protected the hearths, HVAC systems, and families of the greater St. Louis metropolitan area. Based out of O'Fallon, Missouri, our certified technicians travel across a wide service area to deliver industry-leading chimney cleaning, air duct extraction, dryer vent cleaning, and structural chimney repair. Our Primary Service Areas We proudly serve homeowners, real estate agents, and property managers throughout the following regio

The Mad Hatter Service Company has proudly served the St. Louis metro area and surrounding communities since 1978. As a second-generation, family-owned business, we offer certified chimney sweeping, air duct cleaning, dryer vent cleaning, and structural repair services throughout Missouri and the Greater St. Louis region. Primary Service Locations Our headquarters is located in O'Fallon, MO, and we serve a wide radius of St. Louis communities. Below are the primary cities and