Do you need a permit for solar panels in Chicago?

Yes, always. Rooftop solar counts as building and electrical work in Chicago. The Department of Buildings gives the permit. The Department of Business Affairs and Consumer Protection does not, though several guides name it by mistake.

Since November 2023, a normal home system goes through the Express Permit Program. The city's name for the permit type is Small-Scale Solar Photovoltaic (PV) System. This program replaced three older paper processes at once. They were the Easy Permit Process, Short Form permits, and the Solar Express Permit Process. The city stopped taking new Easy Permit applications after November 2, 2023.

Many owners are surprised by this: you are the main applicant on the permit, but you cannot do the work yourself. The Chicago-licensed electrical contractor named on the permit must do the electrical work. A Chicago-licensed supervising electrician must sign the electrical drawing. An Illinois-licensed architect or engineer may sign it instead. In practice, the installer prepares and files it with you.

Because two city rules use the same number. 13.44 kW is the top limit of the Express Permit Program for solar. It is also where the Chicago Municipal Code's fee table switches from a flat $225 solar line to $250 per array with a $1,000 minimum.

The Express track also caps energy storage at 20 kWh (10 kWh for non-lithium-ion chemistries). It permits only one installation per ComEd electrical service connection. Wall-mounted and ground-mounted arrays do not qualify for Express. The city's instructions leave out some other cases too. One is a ballasted array, which is held down by weights instead of bolts. It is left out on a roof more than 15 feet high on average, or on any sloped roof. Roofs more than 40 feet high on average are also left out, and so are arrays attached with adhesive. Landmark properties also need a separate design review by the city's Historic Preservation Division.

The city's instructions allow inverter output up to 13.44 kW. The Code's higher fee line starts at 13.44 kW or greater. So a system of exactly 13.44 kW sits on the line: ask your installer which applies.

Here is what that means in plain words. A Chicago installer who proposes a system just under 13.44 kW is usually not being stingy. Crossing that line adds at least $775 in permit fees, plus the regular plan-review fee. It also moves the application into a slower review queue. If a quote sits close to the threshold, ask what the permitting difference would be.

Under 13.44 kW, the Chicago Municipal Code charges $225 for a solar installation. Its fee table also marks a zoning fee as required on top, but it does not list that amount. At 13.44 kW or more, the fee is $250 per array with a $1,000 minimum. That fee is charged on top of the regular plan-review permit fee. The city's online fee calculator covers building permits only. So ask your installer what the city actually charged.

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Chicago Municipal Code §14A-12-1204.2, Stand-Alone Permit Fees, as amended December 19, 2025 (Supplement 74 as posted on the City's code library, read October 25, 2026). Table 14A-12-1204.2 has no general minimum fee, unlike the city's plan-review fee tables. The solar line for 13.44 kW or more has its own $1,000 minimum.

Since the December 19, 2025 amendment, the city's fee table has listed these amounts. They can rise when the city updates the table each January 1. In the common case, a home array under 13.44 kW pays $225 for the permit, plus whatever zoning fee applies. If the job also replaces a service disconnecting means under 400 amps, that is a separate $75 line. A system at or above 13.44 kW starts at $1,000 for the solar line, plus the plan-review permit fee. These are published code figures, not quotes. Suburbs price differently. See Aurora's solar permit fees, or solar permits in Northbrook and other north shore towns. The permit is a small part of the total. See what a system costs in Illinois.

Seven steps. The first one catches people out, because it happens before anything is filed.

1. 1
   A licensed professional inspects your home in person.

   Before you can apply, an Illinois-licensed architect or structural engineer must visit your home. A person working under their responsible control (they stay answerable for the work) may go instead. They must check two things in person. One is whether your roof can hold the system, which is its structural capacity. The other is the condition of your electrical system.

2. 2
   Plans are prepared and stamped.

   A new installation always needs drawings and calculations. An Illinois-licensed architect or structural engineer must prepare them. The installer must hold an ICC Distributed Generation Installer Certification. A Chicago-licensed supervising electrician must sign the electrical drawing. An Illinois-licensed architect or engineer may sign it instead.

3. 3
   The application is filed online.

   It goes through the Express Permit Program under the Small-Scale Solar PV System worktype. The owner is the main applicant, and the licensed contractors are named on it.

4. 4
   The city reviews and issues.

   Express applications are reviewed against the Solar Zoning Policy. The Code's fee table also lists a zoning fee for solar. Anything outside the Express criteria goes to Standard Plan Review instead.

5. 5
   Installation.

   The licensed contractor builds it to the approved plans.

6. 6
   City inspection.

   The contractor asks for it. The inspector checks mounting, electrical connections, setbacks, rapid-shutdown signage and roof penetrations (the spots where mounts go through the roof).

7. 7
   ComEd interconnection and permission to operate.

   You cannot legally turn the system on yet. First the city inspection must pass and ComEd must finish interconnection, the hookup to the power grid.

Keep reading: the ComEd step, then how long it all takes.

No. Chicago has not adopted SolarAPP+. It is an automated permitting platform that issues home solar permits instantly in a growing number of American cities. A person reviews every Chicago application.

Be careful here. At least one page ranking for Chicago solar permits says the opposite. According to the National Renewable Energy Laboratory, 256 local permitting offices in 13 states had adopted SolarAPP+ by the end of 2024. Illinois tried to help. In 2025 the Illinois Finance Authority's Climate Bank offered small SolarAPP+ adoption grants ($20,000 to $30,000 each), paid for by the federal Solar for All program. Applications closed on December 31, 2025, or sooner if the money ran out. Chicago is not among the adopters.

Whether that matters to you depends on your patience. A 2025 report called the state's solar market hard to work in. It came from the Environment Illinois Research & Education Center and the Illinois PIRG Education Fund. It found that 31% of Illinois solar permit applications were cancelled in 2024, against 22% nationally in 2022. These findings come from advocacy groups, not a regulator, and we flag them as such. But the direction matches what installers report.

Roof-mounted solar counts as an accessory structure in every Chicago zoning district. That means no district simply bans rooftop panels. What the city regulates is where on the roof they sit.

• 3 feet of clearance from the roof edge on a residential building.
• 4 feet on a non-residential or mixed-use building. This catches out anyone with a storefront below.
• Height is limited too. On a flat roof, no part of the system may be more than 9 feet tall, or more than 5 feet above the parapet, whichever is lower. On a sloped roof, panels must sit flush, no more than 12 inches off the roof, and never past the ridge. Anything that reaches into the public way triggers a separate Department of Transportation review.
• Ground-mounted solar is not permitted in Chicago residential districts at all. This is rarely the plan on a city lot. But it removes an option some homeowners assume they have.

Chicago checks rooftop solar against its Solar Zoning Policy. These rules are about more than looks.

Yes. Flat roofs are common on older Chicago buildings, though only 122 of the City's 1,864 small solar permits in the 12 months to October 23, 2026 were for flat or low-slope roofs. One thing helps rather than hurts. The fire code's rooftop access pathway rules call for two 36-inch clear paths from eave to ridge. Under the previous code, those rules had an exception for roofs with a slope of 2:12 or less. Chicago adopted a new fire code in June 2026, so confirm with your installer that the exception still applies to your roof.

Where it applies, the exception covers flat roofs. Only about 1 in 15 recent Chicago solar permits is for a low-slope roof. The exception removes a constraint that shapes array layouts in pitched-roof markets. Some rules still apply. They are the 3-foot roof-edge setback, the structural review, and wind-loading design, which keeps wind from lifting the panels. On a flat roof, that usually means ballasted racking, which uses weights instead of mounts that go through the roof. If your roof is more than 15 feet high on average, a ballasted array cannot use the Express permit. It goes to Standard Plan Review. The inspection you must get before you apply checks whether your roof can carry that weight.

Roof condition is the other flat-roof issue. A roof in poor condition can trigger a required roofing permit before the solar permit moves ahead. Reroofing later means a fresh permit to remove and reinstall the panels. Our guide to Illinois solar roof requirements covers when to reroof first.

Keep reading: landmark districts and condos and two-flats.

Only if your building is a designated (or proposed) Chicago Landmark or sits in a landmark district. Chicago has a lot of both. City data from September 2026 lists more than 400 individual landmark records. The 2024 Landmarks Ordinance counted 459 designations. They were 388 individual landmarks, 62 landmark districts and 9 district extensions.

If your building is covered, the permit also needs a separate design review, whatever the system size. The Historic Preservation Division of the Department of Planning and Development does that review. The deciding question is usually visibility from the public way. An array set back on a flat roof behind a parapet, unseen from the street, is a very different case from one on a street-facing mansard.

Two practical points. Most alterations are handled at staff level rather than going to the full Commission, which is considerably faster. A pre-permit submission is encouraged and can speed things up. Do it before your installer prepares final drawings, not after. The full Commission meets on the first or second Thursday of the month (check the posted calendar). A project that needs its review has to work around that monthly calendar.

Outside landmark districts, no Chicago rule bans street-facing arrays. The Solar Zoning Policy asks that the panels be grouped together and not shiny, to limit glare.

This is where many Chicago homeowners find the real obstacle, and it is not the city. Municipal permitting treats a two-flat the same as a single-family home. What changes is who owns the roof. For most Chicago condo owners, Illinois' solar-rights law does not protect them.

The Homeowners' Energy Policy Statement Act generally bars an association from prohibiting a solar energy system. But the Act has an exception, and it matters a great deal in a city built on shared walls and shared roofs. The Act does not apply to a building that is more than 60 feet tall. It also does not apply to a building that has a shared roof and is subject to a homeowners' or condominium association. A shared roof is any roof that serves more than one unit. That includes touching roofs that serve neighboring units. It also includes any roof that is part of the common elements, the parts of the building that all owners share.

"This Act shall not apply to any building that: (1) is greater than 60 feet in height; or (2) has a shared roof and is subject to a homeowners' association, common interest community association, condominium unit owners' association."

765 ILCS 165/45, as amended by Public Act 102-161

The practical effect: say you own a condo whose roof is a common element (shared by all owners). Or say you own a unit in an attached townhome row with touching roofs. In either case, the statutory protection does not reach you. Your declaration and your board govern. A single unit owner generally cannot install on a common-element roof without the association's agreement. The city will permit it, but the association is the gate.

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765 ILCS 165, the Homeowners' Energy Policy Statement Act, Section 45, as amended by Public Act 102-161, effective July 26, 2021. Municipal permitting requirements are set by the City of Chicago and do not change with ownership structure. Our Illinois HOA solar rights page covers what a board can and cannot require where the Act does apply.

Five questions settle the eligibility side before anyone talks about panels. Nothing you select is sent anywhere. This runs entirely in your browser.

This step is separate from the city. It is the one most likely to hold up your switch-on. A home solar system uses ComEd's Level 1 interconnection track, which is its simplest path for small systems. That track carries a $50 application fee. Illinois rules cap the customer's total Level 1 interconnection cost at $200. Anything above that is paid back through delivery rates, the wires part of every ComEd bill.

One correction, because this is widely reported wrong: the $200 is a cost cap, not an application fee. The Public Utilities Act itself sets no dollar figure. It leaves it to the Illinois Commerce Commission to set the fees. If a quote lists $200 as your interconnection application fee, it has misread the rules.

Illinois rules give ComEd up to 7 business days to confirm the application is complete. They give it up to 15 more business days to check the screens and send a conditional agreement. A witness test follows unless it is waived. Together, that is up to 22 business days, about four and a half weeks, for a complete application. If your installer files early, much of that time runs while the city reviews your permit. How your generation is then credited is covered on ComEd net metering.

From signing to switching on, a straightforward Chicago installation takes weeks rather than days. The last stage is usually the longest.

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These times come from the published ComEd Level 1 timeframes and from Department of Buildings process descriptions. The city does not publish a guaranteed turnaround for solar permits. So review times are estimates, not promises. Landmark and Standard Plan Review projects vary the most.

Most Chicago delays are avoidable. They cluster around a handful of causes. Knowing them helps you judge whether an installer really works in the city or treats Chicago like anywhere else in Illinois.

• The wrong code edition. Chicago enforces its own amended electrical code. A plan set that cites generic national code sections instead of the Chicago numbering earns a correction cycle.
• The 3-foot setback applied to a mixed-use building that needs 4 feet. This is common on two-flats with a storefront.
• Skipping the required inspection by the licensed design professional before you submit.
• An out-of-town contractor who has no City of Chicago electrical contractor licence. Also check their Illinois Shines vendor status. Another cause is drawings that a Chicago-credentialed electrician has not signed.
• A landmark property that skips the Historic Preservation design review.
• A roof in poor condition. It can trigger a roofing permit or a roof check before the solar work starts.
• Interconnection filed late. Some installers only file with ComEd after installation, which adds weeks before permission to operate. Ask when they file. It should be early, not last.

The questions worth asking any installer are on how to vet an Illinois solar quote. For Chicago, add two. Are you licensed as an electrical contractor with the City of Chicago? And when do you file the ComEd interconnection application?

Chicago permitting uses words you rarely see elsewhere. Installers use them as though everyone knows them. These are the terms worth knowing before you read a quote or a permit application.

Express Permit Program

Chicago's fast, web-based permit track for smaller defined scopes of work. It launched in November 2023 and replaced the Easy Permit Process, Short Form permits and the Solar Express Permit Process. Home solar under 13.44 kW goes through it.

Small-Scale Solar Photovoltaic (PV) System

The city's official worktype name for a home rooftop solar permit inside the Express Permit Program. If your installer calls it something else on the paperwork, ask why.

Standard Plan Review

The slower, plan-based permit track. Solar goes here when the system is over 13.44 kW. It also goes here when it falls outside another Express limit, such as a ballasted array on a roof more than 15 feet high.

Stand-alone permit

A trade permit (electrical, plumbing or mechanical) priced from its own fee table rather than by building area. Home solar has its own line on that table. It is $225 under 13.44 kW, and $250 per array ($1,000 minimum) at 13.44 kW or more.

Service disconnecting means

The main switch or breaker that cuts all power entering the building. Replacing or upgrading it is a separate $75 permit line under 400 amps. Whether your job needs one is a common reason quotes differ.

Solar Zoning Policy

The City of Chicago guidance that treats rooftop solar as an accessory structure in every zoning district. It also limits how tall rooftop panels may stand. Chicago reviews rooftop solar against it.

Contributing building

A building inside a Chicago landmark district that adds to the district's history and look. These buildings need Historic Preservation review for solar. That is true even if they are not individually designated landmarks.

Rapid shutdown

A safety rule that lets firefighters turn off power in the rooftop wires from the ground. Chicago's fire code requires labelled rapid-shutdown signage. Missing signage is a routine inspection failure.

Level 1 interconnection

The simplest of ComEd's three interconnection tracks (its ways to connect to the grid). Home solar that runs through an inverter uses it. It carries a $50 application fee. Illinois rules cap the customer's total Level 1 cost at $200.

Permission to operate

ComEd's approval to switch the system on. It is granted only after the city inspection passes and interconnection is complete. Until it arrives, the array is installed but legally idle. This is usually the longest wait in the whole process.