Building Codes

Tenant Build-Out and Business Occupancy Permits

The City of Naperville has adopted the 2012 edition of the International Codes published by the International Code Council for residential, commercial and multi-family construction. The City has also adopted amendments to 2012 International Codes, which can be found in Title 5 of the Municipal Code.

  • International Building Code (2012)
  • International Residential Code (2012)
  • International Fire Code (2012)
  • International Plumbing Code/Private Sewage Disposal Code (2012)
  • International Mechanical Code (2012)
  • International Fuel Gas Code (2012)
  • International Code Council Electrical Administrative Provisions (2006) and National Electric Code (2011)
  • International Swimming Pool and Spa Code (2012)
  • International Existing Building Code
  • Illinois Energy Conservation Code (2015 IECC as amended by the State of Illinois)
  • Illinois State Plumbing Code (current)
  • Illinois Accessibility Code (current)

All permits submitted on or after March 1, 2013 must comply with the new codes.

2018 International Building Code Update

Over the course of 2018, the City of Naperville will be undertaking a process to update the family of building codes that the City currently utilizes to the 2018 International Building Code (IBC) standards. These building codes were last updated in 2012.

Because building codes are ever evolving to keep pace with new technology, materials and trends in the building industry, it is recommended to review and adopt the latest codes on a regular basis to ensure continued quality and safe construction. 

The code review began in January 2018 and is expected to conclude with City Council adoption in late 2018. 

City staff organized committees to review the new code provisions, identify and discuss significant code changes, and make recommendations. Each code committee included city staff, as well as representatives from the business, building, and residential community, depending upon the code section being evaluated.


Jan 18

Teams review & discuss new codes

Feb 18

Teams reconvene, identify significant changes

Apr 18/May 18

Present significant changes (chart/bullet format) to BRB

July/ August 2018

Present significant changes (chart/bullet format) to Council

August 2018/September 2018

Public review period

October 17, 2018

Discuss recommendations with the BRB

Nov 2018

Prepare draft Title 5 Text Amendment for Council review

 Dec 2018

Final adoption by City Council 

 Jan 2019

2018 IBC Codes effective

Illinois Energy Conservation Code Updates

Permits applied for on or after January 1, 2016, are subject to the 2015 IECC and ASHRAE 90.1-2013 with Illinois amendments.


New Commercial Building Concept Approval

When an addition to commercial structures or new structure is being planned, complete a Concept Meeting Request Form to be assigned a City project manager. 

Occupying an Existing Business Space?

Attendance at a Tenant Build-Out Meeting is required.