Generator Permit Requirements in Winnetka, Kenilworth & Glencoe

Winnetka, Kenilworth, and Glencoe all require a permit before you install a standby generator, and each village sets its own rules for noise, placement, and size. Kenilworth caps generator sound at 68 decibels and keeps units at least 15 feet from a side or rear lot line. Glencoe skips a flat setback and instead limits how big a generator can be if you want it close to your house. Winnetka requires the permit and a licensed contractor but has not published a generator-specific setback table the way its two neighbors have. Getting the placement right on the first try saves weeks of back and forth with the village.

Why Do These Three Villages Handle Generators Differently?

All three villages sit close together on the lake, and all three saw a wave of generator permit applications after last July's storms knocked out power to more than 122,000 ComEd customers across the region. See our explanation of why North Shore power goes out so often for the full picture. For the general permit process that applies statewide, our Illinois generator permit guide covers the baseline. This article covers where Winnetka, Kenilworth, and Glencoe add their own rules on top of that baseline.

What Does Winnetka Require for a Generator Permit?

Winnetka requires a Generator Permit Application for any new or replacement standby generator, and the electrical work must be done by a contractor licensed in a municipality in Illinois, Wisconsin, or Indiana. The village lists the generator permit alongside its other building permit applications, meaning it goes through the same Community Development review as a deck or a furnace swap.

Winnetka's building permit fee page does not publish a flat dollar figure for a generator permit the way it does for a fence or a pool. The village's Permit Coordinator can confirm your project's exact fee once you submit a scope of work, and inspections are scheduled through the Permit and Zoning Technician at least 24 hours in advance. Unlike Kenilworth and Glencoe, Winnetka has not published a generator-specific decibel limit or lot line setback on its public pages, so plan to confirm your exact placement with Winnetka's Community Development Department before you commit to a spot on your lot. If you live in Winnetka, our Winnetka generator page covers what a typical install involves beyond the permit paperwork.

What Does Kenilworth Require for a Generator Permit?

Kenilworth's zoning code caps generator noise at 68 decibels and requires the unit to sit at least 15 feet from a side or rear lot line. This is the most detailed generator-specific zoning section of the three villages, spelled out in Section 153.086 of the Kenilworth code.

The rule works in two parts. First, the generator itself has to be manufacturer-rated for sound emissions no higher than 68 decibels at a distance of seven meters, which is about 23 feet. Second, once it is installed, actual sound measured at any lot line, five feet above grade, still cannot exceed 68 decibels. The unit has to sit in a side yard or the rear yard, never a side yard that faces the street on a corner lot, and it must stay at least 15 feet back from the side or rear property line. Kenilworth also requires the generator to sit at grade. It cannot be bolted to an exterior wall or mounted on a roof. Testing is limited too: no more than one test per seven days, capped at 30 minutes, and only between 10 a.m. and 3 p.m. Monday through Friday. Full detail is in Kenilworth's electrical generator ordinance. If you live in Kenilworth, our Kenilworth generator page walks through sizing and installation.

What Does Glencoe Require for a Generator Permit?

Glencoe does not set a flat setback for generators. Instead, a generator qualifies for a reduced side yard setback only if it stays small and stays close to the house. That is a different approach from Kenilworth's fixed 15 foot rule, and it catches homeowners who assume every village measures the same way.

Under Section 5-101(D)(17) of Glencoe's zoning code, an emergency generator is exempt from the village's normal side yard and floor area rules only when it meets four conditions at once: it has to serve the home's principal building, it cannot exceed 39 inches in height or 53 inches in length or width, it has to sit in the rear yard or the required minimum side yard, and it cannot be more than 3 feet from the side or rear wall of the house it backs up. Sound is capped at 70 decibels measured at any lot line, and the village will not issue the permit unless your application includes evidence that your unit meets that sound limit. Testing is restricted to 9 a.m. to noon on weekdays, excluding holidays, which is a tighter window than Kenilworth's. See Glencoe's accessory structures and uses ordinance for the full text. If you live in Glencoe, our Glencoe generator page covers what a local install looks like.

How Do the Three Villages Compare?

Side by side, Kenilworth regulates with a distance rule, Glencoe regulates with a size rule, and Winnetka leans on its permit and contractor licensing process instead of a published number. Here is how the specifics line up.

Every North Shore village still sits on top of the baseline in NFPA 37, the national fire standard that allows a listed standby generator as close as 18 inches from the house wall and requires at least 5 feet of clearance from any window, door, or vent that opens. Village rules can only add distance on top of that baseline, never take it away. Our Illinois generator cost guide breaks down how permit and site work fit into a total project budget.

How Does Screening and Placement Work in These Villages?

Kenilworth and Glencoe both control how visible a generator is, just through different mechanics than a planted hedge. Kenilworth's code notes that a generator placed in an integrated weather-resistant housing is not treated as a separate accessory structure, so the unit's own factory enclosure does most of the visual work instead of triggering an additional screening review. Glencoe takes a placement-based approach: capping the unit at 39 inches tall and requiring it to sit within 3 feet of the house wall keeps it tucked against the building rather than standing alone in the middle of a side yard. In practice, this means a compact, close-to-the-house installation clears Glencoe's rule more easily than a larger unit set further out, even if the larger unit is otherwise quieter.

None of the three villages requires a specific hedge or fence around a generator, but many homeowners add one anyway, both for looks and to soften the sound the unit does make during a weekly self-test.

How Does the Permit and Inspection Process Work?

The steps are close to identical across all three villages, even though the fees and setback rules differ.

1. Site visit. Your installer checks your electrical panel, your gas meter capacity, and possible generator locations on your lot against each village's rule.
2. Application. Winnetka uses its Generator Permit Application. Kenilworth and Glencoe review generators through their standard building and zoning permit process.
3. Village review. Reviewers check the electrical drawings, gas piping plan, and, in Kenilworth and Glencoe, the decibel rating and lot line distance.
4. Install. The pad, gas line, wiring, and automatic transfer switch go in once the permit is issued.
5. Inspections. An electrical inspection checks wiring and grounding. A gas inspection pressure tests the new fuel line.
6. Close out. The village marks the permit final. Keep that record with your house paperwork for resale and insurance purposes.

Plan on a few weeks from application to approval in a normal month, and expect a longer wait right after a big storm, when every village sees applications spike at once.

What Happens If You Skip the Permit in These Villages?

All three villages can issue a stop work order the moment an inspector notices an unpermitted generator, and all three can require the installation to be opened up or moved before a late permit gets approved. In Kenilworth or Glencoe, that often means proving after the fact that a unit already meets the decibel and setback rules, which is a harder conversation than confirming it before the pad gets poured.

The bigger risk shows up later. An insurance company can question a claim tied to unpermitted gas or electrical work. A home sale can stall when a buyer's attorney finds an open or missing permit on file with the village. A generator installed 10 feet from a Kenilworth side lot line, five feet short of the required 15, is a problem a village inspector will eventually find, whether that is during a routine drive-by or when the next owner tries to sell the house.

Generator Permit Questions, Answered

How loud can a generator legally be in Kenilworth?

Kenilworth caps generator sound at 68 decibels two ways: the unit itself must be manufacturer-rated for no more than 68 decibels at 7 meters, roughly 23 feet, and actual sound measured at any lot line, 5 feet above grade, cannot exceed 68 decibels either.

What size generator qualifies for Glencoe's reduced setback?

To qualify for Glencoe's setback exemption, a generator cannot exceed 39 inches in height or 53 inches in length or width, must sit in the rear yard or required minimum side yard, and cannot be more than 3 feet from the side or rear wall of the house it serves.

Do I need a licensed contractor to pull a generator permit in Winnetka?

Yes. Winnetka requires the electrical work to be performed by a contractor licensed in a municipality in Illinois, Wisconsin, or Indiana. Your installer handles this step as part of the permit application.

When can I test my generator in Kenilworth or Glencoe?

Kenilworth allows testing once every 7 days, for up to 30 minutes, only between 10 a.m. and 3 p.m. Monday through Friday. Glencoe allows testing only between 9 a.m. and noon on weekdays, excluding holidays. Winnetka has not published a separate generator testing window.

Can I mount a standby generator on my house in Kenilworth?

No. Kenilworth's ordinance requires electric generators to be installed at grade only. They cannot be attached to an exterior wall or mounted on a roof of any principal or accessory structure.

How much does a generator permit cost in Winnetka, Kenilworth, or Glencoe?

Winnetka does not publish a flat fee for its Generator Permit Application; the Permit Coordinator confirms cost once you submit a scope of work. We could not confirm current published flat fees for Kenilworth or Glencoe either, so treat any dollar figure from a contractor blog with caution and confirm directly with each village's Building or Planning Division before you budget.