Missouri's housing market spans a wide range of ages and styles, from late-1800s brick homes in St. Louis to early-1900s craftsman bungalows, mid-century ranches across the suburbs, and newer construction in expanding metro areas. Each era brings its own inspection considerations.
Expansive clay soil is one of Missouri's signature inspection concerns, particularly in the St. Louis metro area. Clay soils shrink during dry periods and swell when wet, creating seasonal movement that stresses foundations, causes doors to stick, and produces horizontal cracks in basement walls. Understanding what's normal settlement versus active structural concern requires careful evaluation.
Missouri has elevated radon levels in many areas. The state ranks among the higher-risk regions nationally, and testing is particularly important for homes with basements or crawl spaces in the northern and central parts of the state.
Older housing stock in St. Louis and Kansas City neighborhoods often includes knob-and-tube wiring, galvanized plumbing, lead water service lines, and original clay tile sewer laterals. These are common findings that don't necessarily stop a sale but do factor into negotiation and future maintenance planning.
St. Louis City has a unique requirement that sets it apart from most municipalities: sellers must obtain a sewer lateral inspection certificate before closing on a property. This requirement exists because of the age of the city's sewer infrastructure and the prevalence of cracked or root-compromised clay tile laterals.
Common Missouri Considerations
- Clay soil foundation movement
- Sewer lateral deterioration (clay tile)
- Older electrical systems
- Lead water service lines
- Radon
- Basement water intrusion
- Aging galvanized plumbing
Local Requirements: Missouri follows the International Residential Code with local amendments; St. Louis City requires sewer lateral inspection certificates for property sales