DuPage County, IL — Generator Installation Guide
Standby Generator Installation in Wheaton, IL
The August 2020 derecho cut power to tens of thousands of DuPage County homes, some for 4–5 days. Real install-cost drivers, honest sizing, and local permit rules — what a Wheaton homeowner needs before buying a whole-home standby generator.
Free and no obligation. Your request goes to one established installer covering Wheaton — never sold to a list of contractors.
Why Wheaton Homeowners Buy Standby Generators
August 2020
The Midwest derecho knocked out power to more than 800,000 ComEd customers across northern Illinois — about 58,000 of them in DuPage County — with full restoration taking roughly 4–5 days. Wheaton is served by ComEd, so a regional event like this drives the same multi-day outages here.
July 2024
A derecho sequence brought roughly 90 mph downburst gusts across DeKalb, Kane, and DuPage Counties, comparable in reach to the 2020 storm. DuPage County sees damaging wind events capable of multi-day outages most years.
Each event above is documented northern Illinois storm history — dated events, not marketing. A standby generator turns on within seconds of an outage — no extension cords, no starting a portable unit in the rain.
Wheaton at a Glance
$455,700
Median Home Value
$120,008
Median Household Income
71.7%
Homeownership Rate
58.0% of housing
Single-Family Homes
Wheaton city, ACS 2024 5-yr. Census tables B25077 · B19013 · B25003 · B25024. Retrieved 2026-07-01.
What Does a Generator Cost in Wheaton?
Wheaton is in the Chicago-area labor market. Installed costs run higher than the national averages you will find on generic home improvement sites. For most Wheaton homes, a 22kW Generac Guardian installed starts around $12,000 — permits excluded, standard site conditions.
| Generator | Starting Installed Price | Notes |
|---|---|---|
| 14kW Generac Guardian | $10,500 | Essentials or small whole-home. Tight on NG for 4-ton AC. |
| 18kW Generac Guardian | $11,900 | Good whole-home option for smaller homes. |
| 22kW Generac Guardian | $12,000 | Recommended for most 2,500 sq ft homes in Wheaton |
| 24kW Generac Guardian | $12,500 | For larger homes or EV charger included. |
| 26kW Generac Guardian | $13,000 | Largest air-cooled residential option. |
Source: GSHA Services (serving Cook, DuPage, Lake, Will, Kane counties). Starting prices — permits excluded. Standard install = 10 ft gas and electric piping above grade. Long gas runs, panel upgrades, or difficult access add cost.
Recommended size for Wheaton
For a typical Wheaton home — about 2,500 sq ft with gas appliances and a 3–4 ton central AC — the recommended standby generator size is 22kW. That is the right call for most Wheaton homes: a home that size needs more load headroom than a 14kW unit can reliably hold during a summer outage.
Want the full sizing math — why 14kW runs out of headroom and where 22kW gets its margin? See the complete generator sizing guide.
Still deciding? Weigh the 20-year cost of ownership and ROI, or learn how to compare installer quotes.
Wheaton Permit Requirements
A permit is required; the City of Wheaton Building & Code Enforcement Department issues building/electrical permits. Fees are set by the city fee schedule and quoted at application.
For the metro-wide picture — verified fees by jurisdiction, who can pull the permit, ComEd vs. municipal electric, Nicor meter upgrades, and the inspection sequence — see the Chicago-area generator permits & utility guide.
| Requirement | Detail |
|---|---|
| Electric utility | ComEd |
| Gas utility | Nicor GasWheaton is served by Nicor Gas. If adding a generator exceeds your existing meter capacity, contact your gas utility to request a meter capacity review before installation. Allow 3–4 weeks for utility response. |
| Setbacks — NFPA 37 / manufacturer |
|
HOA Note
Wheaton city permits do not override HOA covenants (CC&Rs). Some HOAs require board approval, screening requirements, or specific placement for generator installations. Check your CC&Rs before ordering equipment — this is a separate process from the city permit.
What Makes Wheaton Different
Wheaton homes are served by ComEd for electricity and Nicor Gas for natural gas — there is no municipal electric utility, so outage restoration follows ComEd's regional storm response.
Wheaton sits in the West Branch DuPage River and Winfield Creek watershed with mapped FEMA floodplains. If your lot is in or near a flood zone, a standby generator should be sited and elevated above the base flood elevation.
The electrical contractor installing your generator must be registered with the City of Wheaton and provide a copy of their electrical license — this is separate from the building permit itself.
Comparing Installer Quotes in Wheaton
The surest way to know a Wheaton quote is fair is to put two or three comparable quotes side by side. These guides show what to check before you sign.
Guides to read before you sign
- How to compare installer quotes — a line-by-line checklist, the questions to ask, and the red flags.
- Transfer switches & load management — what stays on, and how a smaller unit can back your whole home.
- The warranty guide — what five years really covers, and what keeps it valid.
- The Chicago-area standby generator guide — costs, sizing, brands, and every city we cover.
Wheaton Generator FAQ
Do I need a permit to install a standby generator in Wheaton?
Yes. Wheaton publishes requirements specifically for electrical generators, and there is a step homeowners routinely miss: the electrical contractor installing your generator must be registered with the City of Wheaton and provide a copy of their electrical license. That contractor registration is separate from the building permit itself, so an otherwise-qualified installer who has not registered with the City will hold up your job. Ask any installer to confirm their Wheaton registration before you sign.
What size generator does a Wheaton home need?
For most homes, 22kW is the typical recommendation. Air-conditioning startup surge is usually the deciding factor rather than square footage, and homes with two HVAC systems or a well pump may warrant a larger unit. An installer should size the generator against your actual load, and a larger unit sometimes calls for a panel upgrade.
Does Wheaton’s floodplain affect where my generator can be placed?
It can. Wheaton sits in the West Branch DuPage River and Winfield Creek watershed with mapped FEMA floodplains. If your lot is in or near a flood zone, the generator should be sited and elevated above the base flood elevation — the same storms that knock out power are the ones that put water on the ground. Confirm siting and pad height with your installer.
Who supplies electricity and gas in Wheaton?
Wheaton homes are served by ComEd for electricity and Nicor Gas for natural gas, with no municipal electric utility. Outage restoration therefore follows ComEd’s regional storm response. A standby generator typically runs on natural gas from the existing Nicor service, so the practical question is whether the gas line is sized for the unit — not whether fuel is available.