Section 600.420  Local Jurisdiction

a)         Construction projects involving residential buildings and for which a municipality or county requires a building permit must comply with the Illinois Energy Conservation Code if the project involves new construction, addition, alteration, renovation or repair.  In the case of any addition, alteration, renovation or repair to an existing residential structure, the Code as described by this Subpart D applies only to the portions of that structure that are being added, altered, renovated or repaired. [20 ILCS 3125/20(a)]

b)         The local authority having jurisdiction (AHJ) shall establish its own procedures for enforcement of the Code. 

c)         A unit of local government that does not regulate energy efficient building standards is not required to adopt, enforce or administer the Code; however, any energy efficient building standards adopted by a unit of local government must comply with the Act.  If a unit of local government does not regulate energy efficient building standards, any construction, renovation or addition to buildings or structures is still subject to the provisions contained in the Act. [20 ILCS 3125/20(d)].

(Source:  Amended at 47 Ill. Reg. 17974, effective November 27, 2023)