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IllinoisHB3510104th General Assembly (2025–2026)HouseWALLET

BUILDING-STRETCH CODES

Sponsored By: Matt Hanson (Democratic)

Became Law

energy & environmentassignmentsenergy and public utilities

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Bill Overview

Analyzed Economic Effects

3 provisions identified: 0 benefits, 0 costs, 3 mixed.

Tighter energy rules for new homes

The Stretch Code sets home energy targets using a site energy index against the 2006 IECC. By June 30, 2024, homes must meet SEI 0.50 or lower. By December 31, 2025, homes must meet SEI 0.40 or lower; the Board may allow 0.42 only if it finds unexpected burdens, and it must stay at least 0.05 stricter than the 2024 IECC. By December 31, 2028, homes must meet SEI 0.33 or lower; the Board may allow 0.35 only if it finds unexpected burdens tied to 2025, and it must stay at least 0.05 stricter than the 2027 IECC. By December 31, 2031, homes must meet SEI 0.25 or lower. These rules apply where the Stretch Code governs (in towns that adopt it and on Board‑funded projects).

Stricter energy rules for businesses

The Stretch Code sets energy targets for commercial buildings using a site energy index against the 2006 IECC. By June 30, 2024, buildings must meet SEI 0.60 or lower. By December 31, 2025, SEI 0.50 or lower. By December 31, 2028, SEI 0.44 or lower. By December 31, 2031, SEI 0.39 or lower. These rules apply where the Stretch Code governs (in towns that adopt it and on Board‑funded projects).

Towns can adopt tougher energy code

The state creates the Illinois Stretch Energy Code to go beyond the base code. Any town can adopt it, and it then replaces the Illinois Energy Conservation Code in that town. The Board must finish the code and make it available by June 30, 2024. Starting July 1, 2024, any project the Capital Development Board funds or authorizes must follow the Stretch Code when an energy code applies. Towns may use utility programs to help buildings comply, and utilities may count only the extra savings from their help toward annual goals under the Public Utilities Act. The Board must meet the Energy Code Advisory Council within 60 days of the law taking effect, and the Council must complete recommendations by December 31, 2023.

Sponsors & Cosponsors

Sponsor

  • Matt Hanson

    Democratic • House

Cosponsors

  • Bill Cunningham

    Democratic • Senate

  • Dave Vella

    Democratic • House

Roll Call Votes

All Roll Calls

Yes: 158 • No: 71

Senate vote • 5/22/2025

Third Reading - Passed;

Yes: 42 • No: 16

Senate vote • 5/8/2025

Do Pass Energy and Public Utilities;

Yes: 8 • No: 4

House vote • 4/10/2025

Third Reading - Short Debate - Passed

Yes: 76 • No: 38

House vote • 4/8/2025

House Floor Amendment No. 2 Recommends Be Adopted Energy & Environment Committee;

Yes: 17 • No: 8

House vote • 3/18/2025

Do Pass / Short Debate Energy & Environment Committee;

Yes: 15 • No: 5

Actions Timeline

  1. Public Act . . . . . . . . . 104-0315

    8/15/2025House

  2. Effective Date January 1, 2026

    8/15/2025House

  3. Governor Approved

    8/15/2025House

  4. Sent to the Governor

    6/20/2025House

  5. Passed Both Houses

    5/22/2025House

  6. Third Reading - Passed; 042-016-000

    5/22/2025Senate

  7. Placed on Calendar Order of 3rd Reading May 14, 2025

    5/13/2025Senate

  8. Second Reading

    5/13/2025Senate

  9. Placed on Calendar Order of 2nd Reading May 13, 2025

    5/8/2025Senate

  10. Do Pass Energy and Public Utilities; 008-004-000

    5/8/2025Senate

  11. Assigned to Energy and Public Utilities

    4/29/2025Senate

  12. Referred to Assignments

    4/14/2025Senate

  13. First Reading

    4/14/2025Senate

  14. Chief Senate Sponsor Sen. Bill Cunningham

    4/14/2025Senate

  15. Placed on Calendar Order of First Reading

    4/14/2025Senate

  16. Arrive in Senate

    4/14/2025Senate

  17. Third Reading - Short Debate - Passed 076-038-000

    4/10/2025House

  18. Placed on Calendar Order of 3rd Reading - Short Debate

    4/10/2025House

  19. House Floor Amendment No. 2 Adopted

    4/10/2025House

  20. Recalled to Second Reading - Short Debate

    4/10/2025House

  21. House Floor Amendment No. 2 Recommends Be Adopted Energy & Environment Committee; 017-008-000

    4/8/2025House

  22. House Floor Amendment No. 2 Rules Refers to Energy & Environment Committee

    4/8/2025House

  23. House Floor Amendment No. 2 Referred to Rules Committee

    4/7/2025House

  24. House Floor Amendment No. 2 Filed with Clerk by Rep. Matt Hanson

    4/7/2025House

  25. Added Chief Co-Sponsor Rep. Dave Vella

    4/3/2025House

Bill Text

  • Engrossed

    PDF

  • Enrolled

    PDF

  • House Amendment 1

    PDF

  • House Amendment 2

    PDF

  • Introduced

    PDF

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