Illinois' continental climate with harsh winters and humid summers creates specific challenges for homes throughout the state. From Chicago's historic neighborhoods to suburban developments across the collar counties, Illinois homes face weather extremes that test every system.
Basement water intrusion is the signature Illinois inspection concern. The combination of clay soils, high water tables, and freeze-thaw cycles creates conditions where basement moisture is common. Sump pumps, French drains, and waterproofing systems are standard in many Illinois homes.
The freeze-thaw cycle affects foundations, driveways, and exterior masonry. Water enters cracks, freezes and expands, then causes further damage. Inspectors look carefully at foundation walls, brick pointing, and concrete flatwork for this type of deterioration.
Illinois has significant older housing stock, particularly in Chicago and inner-ring suburbs. Homes from the early 1900s through 1950s may have knob-and-tube wiring, galvanized plumbing, and aging foundations that require evaluation and often updating.
The state follows the International Residential Code with local amendments. Chicago has its own building code that differs from suburban jurisdictions. Radon is also a concern in Illinois, with elevated levels common in many areas.
Common Illinois Inspection Issues
- Basement water intrusion
- Foundation cracks from freeze-thaw
- Aging electrical and plumbing
- Radon
- Ice dam damage
- Old masonry deterioration
Local Requirements: Illinois Residential Building Code, Chicago maintains separate building code