Install a Generator Cost in Illinois in 2026
Most Install a Generator projects in Illinois cost between $1,700 and $30,000. The typical price is $9,000.
Standby generators are dominated by equipment cost and the gas line run.
Labour and materials in Illinois run about 12% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Panel capacity and whether an upgrade is needed
- Running new circuits through finished walls
- Permit and inspection in your jurisdiction
- Aluminium wiring or knob-and-tube remediation
Usually included
- Licensed electrician labour
- Wire, boxes, breakers and devices
Usually extra
- Drywall repair after the walls are opened
- Fixtures you supply
- Utility service upgrades