City of St. Charles - Community Development Department

Building and Related Codes

The purpose of building codes is to see that the buildings we live and work in are reasonably safe from fire, safety and health hazards and that they provide adequate light, air, and basic facilities such as sanitation and heat. Codes also provide for equal accessibility for disabled persons.

Several private nonprofit organizations publish model codes that are adopted by cities, towns and counties throughout the United States. St. Charles has adopted some of these codes, with amendments that tailor them to the needs of our community.

Click on the links below to access the code publishers, as well as St. Charles’ amendments to the model codes. Many public libraries have a copy of the published codes for reference.

2000 International Residential Code for One- and Two-Family Dwellings

St. Charles Amendments to 2000 International Residential Code

2003 International Building Code

St. Charles Amendments to 2003 International Building Code

2003 International Mechanical Code

St. Charles Amendments to 2003 International Mechanical Code