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Code Status: Illinois

This page contains information about current energy codes in the state of Illinois. Information for all 50 States is also available. Illinois Code News.

Current State Codes

  • Residential Code: None mandated statewide.
  • Commercial Code: 2006 IECC AND 2004 ASHRAE 90.1 statewide. Can use COMcheck to show compliance.
  • Code Change Cycle: No set schedule.
  • Jurisdictions: (Information last updated August 13, 2008. See ICC Online for up-to-date jurisdictional adoption information).
    • 2006 IECC: Algonquin, Bartlett, Batavia, Bellwood, Big Rock, Caledonia, Calumet City, Cortland, Countryside, Des Plaines, Du Page County, Edwardsville, Flossmoor, Fox River Grove, Galena, Homer Glen, Jersey County, Jerseyville, Kingston, Kirkland, Libertyville, Lincolnshire, Lindenhurst, Manhattan, Mt. Carmel, Naperville, New Lenox, Northbrook, Oak Forest, Palos Heights, Palos Park, Peoria, Peoria County, Rantoul, Round Lake, Sangamon County, South Holland, Sterling, Streator
    • 2003 IECC: Andover, Ashton, Atkinson, Bethalto, Bloomingdale, Breese, Burr Ridge, Byron, Calumet Park, Cambridge, Canton, Carol Stream, Charleston, Creston, Crete, East Alton, East Moline, Elgin, Elmhurst, Geneseo, Geneva, Gilbert, Glen Carbon, Glen Ellyn, Grayslake, Hanover Park, Highland, Hillcrest, Hoffman Estates, Illinois State Board of Education, Joliet, Maryville, Matteson, Minooka, Norridge, Oak Park, Orland Hills, Palatine, Pekin, Plainfield, Prospect Heights, Rochelle, Rockford, Rolling Meadows, Romeoville, Schaumburg, South Elgin, Spring Grove, Thornton, Troy, Wauconda, Wayne, West Chicago, Wheeling, Will County, Worth
    • 2000 IECC: Addison, Apple Canyon Lake POA, Barrington, Bolingbrook, Braidwood, Country Club Hills, De Kalb County, Deerfield, Downers Grove, East Dundee, Flora, Glendale Heights, Glenview, Hampshire, Highland Park, Hinckley, Hinsdale, Lee, Manteno, Maple Park, Mokena, Olympia Fields, Shabbona, West Dundee, Yorkville
    • 1998 IECC: Orland Park, Willow Springs
    • Other local codes: Cahokia, Cantrall, Chicago, Clear Lake Villa, Collinsville, Lemont
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Code Adoption & Change Process

Process Type: Legislative

Code Change Process: The promulgation of a statewide residential energy code, and changes to the commercial energy code proceed through the state legislature.

State Code History: In August 2004, House Bill 4099, the Energy Efficient Commercial Building Act created a mandatory statewide energy code for commercial buildings, based on the 2001 IECC and its reference to ASHRAE 90.1-1999. The energy code will be effective pending a regulatory review process created by the act.

The State legislature has issued a law that all jurisdictions with a building code are required to use the most current IECC edition (the 2006 IECC) for commercial buildings. The code adoptions are expected to become effective in April or May 2007. The Department of Commerce and Community Affairs will be scheduling workshops on the IECC in the coming months.

The Energy Conservation Code for state projects was approved by legislators in 2003 and the administrative rules for the law were developed by CDB and approved by the General Assembly's Joint Committee on Administrative Rules in 2004 and updated recently to include the 2004 edition of the ASHRAE 90.1 American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard.

The Energy Conservation Code for commercial buildings was approved by legislators in 2004. The administrative rules moving the energy code to the 2006 edition of the International Energy Conservation Code were adopted by CDB and the Joint Committee on Administrative Rules (JCAR) and became effective October 9, 2007.

On May 31, 2009, the Illinois General Assembly approved the Energy Efficient Building Act (HB 3987), which (if signed by Gov. Pat Quinn), would include residential buildings under the requirements of the state building code, preempting local jurisdiction home rule power over energy codes. The bill requires the state's Capital Development Board to adopt the most recent version of the International Energy Conservation Code (IECC) within 9 months of its publication and take effect 3 months thereafter.

The requirements of the new energy code will apply to all new residential and commercial buildings (including alterations, additions, renovations, and repairs). Local jurisdictions would be prohibited from adopting energy codes more or less stringent for residential buildings (although exemptions are provided for municipalities that have already adopted a code equivalent to or more stringent than the 2006 IECC [before May 15, 2009] or those that have a population of more than 1 million) and from adopting energy codes less stringent for commercial buildings.

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Energy Consumption Estimates

The consumption estimates below are derived from the total end use of residential and commercial energy consumption in the United States in 2006, and are not limited to energy consumption based on building code-related factors. Source: U.S. Energy Information Administration.

  • Residential Sector: 937.0 Trillion BTU
  • Commercial Sector: 758.8 Trillion BTU
  • Total Energy Consumption: 1,696.1 Trillion BTU
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Construction Activity

Residential:

  • Population (2000 US Census)1: 12,419,293
  • Total Housing Units2: 4,981,258
  • 2004 New Housing Units Authorized by Permit (Privately Owned)3:
    • total units: 62,576
    • 1 unit: 48,898
    • 2 units: 1,628
    • 3 and 4 units: 2,550
    • 5+ units: 9,500
    • structures of 5+ units: 581

References:

  1. http://www.census.gov/population/cen2000/phc-t2/tab01.xls
  2. http://www.census.gov/population/estimates/housing/sthuhh1.txt
  3. http://www.census.gov/const/C40/Table2/20k_t2yu200412.txt
Green Building Initiatives
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Code Funding Opportunities

There are two funding opportunities under the American Recovery and Reinvestment Act of 2009 (ARRA): Energy Efficiency and Conservation Block Grants and State Energy Program. Please reference the U.S. Department of Energy for Illinois's allocated amount and updated information. 

Web Links

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State Energy Code Contacts

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