Peoria IL HVAC permit rules
Peoria's building inspections requires mechanical permits for all HVAC equipment installations and replacements. Apply via peoriail.gov. Illinois licensed HVAC contractors required. Illinois does not require HERS third-party testing. Ameren Illinois serves electricity (1-800-755-5000); Nicor Gas (1-888-642-6748) serves natural gas.
Peoria is an Illinois River city with a manufacturing heritage centred on Caterpillar, which maintains its world headquarters nearby. The city's bluffside topography along the Illinois River means that many Peoria residential properties are on hillsides — a characteristic shared with Charleston WV and giving some Peoria homes walk-out basement access that flat-terrain cities don't have. Ameren Illinois serves electricity; Nicor Gas serves natural gas independently. Illinois contractor licensing applies. The -4°F design temperature and 36-inch frost depth put Peoria solidly in cold-climate heat pump territory.
Peoria's CZ5A climate (-4°F heating design) makes cold-climate heat pump (NEEP ccASHP, -13°F or lower) specification necessary. Standard heat pumps rated to +5°F provide essentially no useful heating at -4°F and run entirely on electric resistance backup — cold-climate models (NEEP ccASHP, -13°F or lower) maintain meaningful output through Peoria's winter range. Manual J load calculations must use Peoria's actual design temperature.
Ameren Illinois: energy efficiency rebates at ameren.com. Nicor Gas: rebates at nicorgas.com. Illinois has ComEd for the Chicago metro but Ameren for Peoria.
Three Peoria HVAC scenarios
| Factor | What it means for your project |
|---|---|
| Cold-climate HP required | -4°F design: NEEP ccASHP -13°F minimum. |
| No HERS testing | Illinois does not require HERS. |
| Utility | Ameren Illinois: 1-800-755-5000. Nicor Gas: 1-888-642-6748. |
| Rebates | Ameren Illinois: energy efficiency rebates at ameren.com. Ni... |
| Portal | Apply at peoriail.gov. |
Phone: (309) 494-8640
Online portal: peoriail.gov
Ameren Illinois (electric): 1-800-755-5000 | Nicor Gas (gas): 1-888-642-6748
Common questions about Peoria, IL hvac permits
Do I need a cold-climate heat pump in Peoria IL?
Yes. Peoria's CZ5A climate has a -4°F design temperature. Standard heat pumps rated to +5°F deliver essentially no useful heating at this temperature. Cold-climate heat pumps (NEEP ccASHP -13°F or lower) are required for effective operation in Peoria.
Does Peoria IL require HERS testing?
No. Illinois does not require HERS third-party testing. Apply via peoriail.gov.
Information based on Peoria, IL official sources and applicable state/local building codes as of April 2026. Codes and fees change — verify current requirements before starting work. For a project-specific report, use our permit research tool.