Will County, IL Building Safety: Green Building Code (2026)
Key Facts
- Green code status
- Voluntary only, applicant's request required
- Governing section
- Will County Code § 150.002(A)(10)
- Applies to
- Unincorporated Will County construction only
- Mandatory codes still required
- 2018 IBC, IRC, and IECC
- Max building code penalty
- $500 per day, per violation
Summary
Will County adopts the International Green Construction Code 2018, but only as a voluntary option contractors can request: it's not a mandatory building standard for unincorporated construction projects.
(A) The following shall be adopted by reference with additional amendments described throughout the remainder of this ordinance: (1) International Building Code 2018. ... (10) International Green Construction Code 2018 on a voluntary basis only upon applicant's request.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2025 S-25: Supplement contains: Local legislation current through Ordinance No. 24-100, passed 4-18-2024 and Res. 23-387, passed 11-16-2023; and State legislation approved through 2024 Pamphlet #2).
Full Breakdown
Section 150.002(A) of the Will County Building Ordinance lists the codes the county has adopted for construction in unincorporated Will County: the 2018 International Building, Residential, Fire, Mechanical and Fuel Gas Codes are mandatory. The International Green Construction Code 2018 appears on that same list, but subsection (10) limits it to a voluntary basis only upon the applicant's request, so no builder in unincorporated Will County is required to meet green-construction standards. The county separately enforces the mandatory Illinois Energy Conservation Code 2018 for energy efficiency, administered by the Building Official. Joliet, Bolingbrook, Romeoville, Plainfield and Lockport enforce their own building codes and are not covered by this county ordinance.
Violations & Fines
Violating any adopted building code provision is a petty offense fined up to $500 per day; but § 150.002(A)(10) makes green-code compliance optional, so there's no penalty for skipping it.
Frequently Asked Questions
Does Will County require green building certification?
Does this rule apply inside Joliet or Bolingbrook?
Sources & Official References
Other rules in Will County
Compare Will County to another location·View the Illinois building safety overview
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