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HB 3510 Illinois House · 104th Regular Session

BUILDING-STRETCH CODES

HB 3510 amends the existing Energy Efficient Building Act. The bill specifically modifies the adoption dates for "stretch energy codes," which are building standards designed to enhance energy efficiency. These codes incorporate "site energy index standards," likely metrics for measuring a building's energy performance. This legislation primarily adjusts the timeline for when these updated energy efficiency requirements will take effect for new construction and renovations.
Issues: ✓ EnergySupports EnergyAmends Energy Efficient Building Act to accelerate adoption of stretch energy codes with site energy index standards, directly advancing building energy efficiency requirements.95% confidence ✓ EnvironmentSupports EnvironmentAmends energy efficiency building codes to require stricter standards, reducing energy consumption and emissions through updated stretch codes.95% confidence
Bill status signed all 5 stages cleared
Introduction
Apr 2025
Committee Review
May 2025
House Passage
May 2025
Senate Passage
May 2025
Signed into Law
Aug 2025
Introduced Apr 14, 2025 Signed Aug 15, 2025
Maddy AI version diff · 2 comparisons

What changed between versions

Engrossed → Enrolled · 3 edits · Aug 15, 2025
MINOR
The bill was finalized as an Enrolled version, incorporating specific updates to energy conservation deadlines and standards. The most significant change involves a correction to the final compliance date, shifting from December 31, 2032 to December 31, 2031, and adjusting the energy efficiency threshold for the 2006 International Energy Conservation Code from 0.39 to 0.39 (with formatting adjustments). These changes ensure the Illinois Stretch Energy Code aligns with a tighter timeline and specific performance metrics.
Scope change
The scope of applicability remains the same, but the timeline for adopting stretch energy codes has been accelerated by one year, and the specific numerical standard for the 2006 code was refined.
TIMELINE

The deadline for adopting a stretch energy code with a site energy index no greater than 0.39 of the 2006 International Energy Conservation Code was moved from December 31, 2032, to December 31, 2031.

REQUIREMENT

The text regarding the 2006 International Energy Conservation Code standard was restructured to clarify the requirement of being no greater than 0.39 of the 2006 code, replacing the previous phrasing about being 0.05 more restrictive than the 2027 code in the final adoption step.

TECHNICAL

Internal page headers and footer markers indicating the 'Engrossed' version were removed and replaced with 'Enrolled' version markers.

Floor votes · Senate May 22, 2025 · House Apr 10, 2025

How they voted

41–16
Passed · 1 other
Total votes 58
May 22, 2025
D Democratic39
38 Yea 1
97% Yea
R Republican19
3 Yea 16 Nay
84% Nay
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
37
Key actions
9
Committee
10
Amendments
4
Aug 15, 2025
Signed into law
Governor Approved
lower
May 22, 2025
Lower · Passed
Passed Both Houses
lower
May 22, 2025
Upper · Passed
Third Reading - Passed; 042-016-000
upper
May 8, 2025
Upper · Passed
Do Pass Energy and Public Utilities; 008-004-000
upper
Apr 29, 2025
Committee
Assigned to Energy and Public Utilities
upper
Apr 14, 2025
Committee
Referred to Assignments
upper
Apr 14, 2025
Introduced
Arrive in Senate
upper
Apr 10, 2025
Lower · Passed
Third Reading - Short Debate - Passed 076-038-000
lower
Apr 10, 2025
Lower · Passed
House Floor Amendment No. 2 Adopted
lower
Apr 8, 2025
Lower · Passed
House Floor Amendment No. 2 Recommends Be Adopted Energy & Environment Committee; 017-008-000
lower
Apr 8, 2025
Lower · Passed
House Floor Amendment No. 2 Rules Refers to Energy & Environment Committee
lower
Apr 7, 2025
Committee
House Floor Amendment No. 2 Referred to Rules Committee
lower
Apr 7, 2025
Introduced
House Floor Amendment No. 2 Filed with Clerk by Rep. Matt Hanson
lower
Mar 18, 2025
Amended
House Committee Amendment No. 1 Tabled
lower
Mar 18, 2025
Lower · Passed
Do Pass / Short Debate Energy & Environment Committee; 015-005-000
lower
Mar 18, 2025
Committee
House Committee Amendment No. 1 Referred to Rules Committee
lower
Mar 18, 2025
Introduced
House Committee Amendment No. 1 Filed with Clerk by Rep. Dave Vella
lower
Mar 11, 2025
Committee
Assigned to Energy & Environment Committee
lower
Feb 18, 2025
Committee
Referred to Rules Committee
lower
2 primary · 1 co-sponsor

Sponsors

Role
Legislator
Party
State
District
P
Photo of Bill Cunningham
Bill Cunningham
DDemocratic
IL
18
P
Photo of Matt Hanson
Matt Hanson
DDemocratic
IL
83
Co
Photo of Dave Vella
Dave Vella
DDemocratic
IL
68