Code libraryNaperville All districts
Naperville All districts
building code.
Naperville adopted the 2024 International Building Code and 2024 International Residential Code, effective February 17, 2026.
Plain English
One- and two-family houses use the 2024 IRC.
Commercial and multifamily work uses the 2024 IBC; the city reviews amendments to both codes.
Numbers Pre-Flight checks
| Field | Value | Source |
|---|---|---|
| Residential code | 2024 IRC | Title 5, Art. B, Sec. 5-1B-1 |
| Commercial code | 2024 IBC | Title 5, Ch. 1 |
Official source
City of Naperville · Title 5, Building CodesEffective / last checked: February 17, 2026
These pages explain what Pre-Flight checks. Always confirm the adopted text on the city's official site.
Pre-Flight is not a permit, not legal advice, and not a substitute for a licensed design professional or the authority having jurisdiction. The city still decides.