# Naperville All districts building code | BV360 Pre-Flight

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 Codes (https://library.municode.com/il/naperville/codes/code_of_ordinances?nodeId=TIT5BUCO). Effective / last checked: February 17, 2026.

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.