Permit Requirements for Smithton, Illinois
For HVAC projects in Smithton, determining the correct permitting authority depends on whether the project site is located within the incorporated city limits or in an unincorporated area of St. Clair County.
Authority Having Jurisdiction (AHJ)
Most jurisdictions require permits for HVAC work to ensure safety and code compliance. The governing body responsible for issuing these permits varies by specific location:
General HVAC Guidelines
Permits are usually required for new installations, structural modifications, or major repairs. While minor maintenance or cosmetic updates may be exempt, landowners should always verify local codes before work begins.
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If you have found a direct link to a permit portal or a specific local ordinance for HVAC in this area, please submit an update.
Because Smithton is located within St. Clair County, the following broader county regulations may also apply to your project:
Illinois, St. Clair County Hvac Permit Regulations and County Ordinances for Unincorporated Areas
In St. Clair County, Illinois, HVAC installations generally require a permit. This applies to new furnaces or AC units, ductwork modifications, gas or electrical line installations, venting system changes, and system type conversions.
County Building & Safety Divisions and Jurisdiction
The St. Clair County Building & Zoning Department handles permits for unincorporated areas. They have adopted the International Building Code 2012 with amendments for these areas.
Rules for Properties in Unincorporated Areas
For properties in unincorporated areas of St. Clair County, the County Zoning Department enforces zoning ordinances and issues building permits. The Building & Zoning Department is located at 10 Public Square in Belleville. A property must have an assigned address from the 9-1-1 Coordinating Office before a building permit can be issued.
Specific HVAC installation requirements may include:
- Permits for new installations or significant upgrades.
- Compliance with HVAC setback requirements, which dictate the proximity of outdoor units to property lines and neighboring homes.
- Energy code compliance certificates, generated using energycodes.gov/rescheck for residential or energycodes.gov/comcheck for commercial, are required before applying for a building permit.
- For commercial or industrial structures, plans and specifications designed by an architect licensed in Illinois are necessary.
- Inspections are required after installation to ensure compliance with the permit and building codes. A re-inspection fee of $75 applies if an inspection fails.
Resources to Learn More
The following statewide building codes and regulations apply universally to all jurisdictions within Illinois:
Illinois Hvac Legislation, Codes, and Guidelines
State-Level Building Codes and Legislation for HVAC in Illinois
In Illinois, the regulatory landscape for building codes, including HVAC requirements, has historically been decentralized, with local units of government (cities and counties) having the authority to adopt and enforce their own building codes. However, this is transitioning toward a more standardized statewide framework.
The most significant statewide mandate regarding HVAC systems is the Illinois Energy Conservation Code. Under the Energy Efficient Building Act (20 ILCS 3125), the state is required to adopt the latest published edition of the International Energy Conservation Code (IECC), typically with specific Illinois amendments. As of recent updates, Illinois has adopted the 2021 IECC. This code establishes mandatory minimum efficiency standards for HVAC equipment, ductwork, and system design for both new construction and major renovations in residential and commercial buildings.
Regarding general mechanical and structural codes (such as the International Mechanical Code or International Residential Code), Illinois has historically allowed local jurisdictions to choose their own standards. However, legislation (Public Act 103-0510) has been enacted to implement a statewide building code effective January 1, 2025. Under this new framework, local codes must regulate structural design in a manner at least as stringent as the International Building Code (IBC) for new commercial buildings or the International Residential Code (IRC) for residential buildings.
It is important to note that Illinois does not issue a statewide license for HVAC contractors or technicians. Licensing, permitting, and inspection requirements are handled entirely at the local municipal or county level. Professionals must verify the specific requirements of the jurisdiction where the work is being performed.
Primary State Agencies
- Illinois Capital Development Board (CDB): The primary agency responsible for adopting and updating the Illinois Energy Conservation Code and overseeing the transition to statewide building code standards.
- Illinois Department of Public Health (IDPH): Responsible for specific codes related to public health, such as the Illinois Plumbing Code, which can intersect with HVAC installations (e.g., condensate drainage).
- Office of the Illinois State Fire Marshal: Oversees fire prevention and safety rules, which include standards relevant to mechanical and fuel gas systems.
Resources to Learn More