Illinois HB 4887: PROPERTY-ENERGY AUDITS

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104TH GENERAL ASSEMBLY 
State of Illinois 
2025 and 2026
HB4887

Introduced , by Rep. Barbara Hernandez 

SYNOPSIS AS INTRODUCED:

20 ILCS 3125/15.1 new

765 ILCS 77/42 new

 Amends the Energy Efficient Building Act. Provides that each builder who completes construction on a newly constructed residential building in the State shall cause an energy audit to be completed on the building resulting in a Home Energy Rating System (HERS) Index Score. Amends the Residential Real Property Disclosure Act. Provides that, subject to certain exceptions, prior to the transfer of title of a dwelling, the seller shall obtain an energy audit resulting in a Home Energy Rating System (HERS) Index Score of the dwelling. Effective immediately.

LRB104 18115 HLH 31554 b

A BILL FOR

HB4887LRB104 18115 HLH 31554 b

1 AN ACT concerning property.

2 Be it enacted by the People of the State of Illinois, 

3represented in the General Assembly:

4 Section 5. The Energy Efficient Building Act is amended by 

5adding Section 15.1 as follows:

6 (20 ILCS 3125/15.1 new)

7 Sec. 15.1. Required energy audits.

8 (a) This Section applies to all newly constructed 

9residential buildings in the State, including single-family 

10dwellings, duplexes, townhomes, and multifamily residential 

11buildings with up to 4 dwelling units, for which a building 

12permit is issued on or after January 1, 2027. 

13 (b) Each builder who completes construction on a building 

14that is subject to this Section shall cause an energy audit to 

15be completed on the building resulting in a Home Energy Rating 

16System (HERS) Index Score. 

17 (c) The energy audit shall: 

18 (1) be conducted by a RESNET-certified Home Energy 

19 Rater; 

20 (2) include on-site diagnostic testing,