The Express Permit Program for Chicago window replacement

The Express Permit Program is Chicago's streamlined route to a building permit for replacement doors, windows and skylights in openings that already exist. The city describes it as "a streamlined way to obtain a building permit for replacement of doors, windows, and skylights in existing exterior wall and roof openings", and runs a dedicated worktype for it, Exterior Window or Door Replacement. Replacing a window in an existing wall opening is eligible in a building up to seven stories tall. Taller than that, the same work stays eligible, but only with drawings prepared by an Illinois-licensed architect or structural engineer. Five things are listed as not eligible, and the first catches people: cutting a new opening. Before any of it, check whether you need a permit at all, because most in-kind swaps in a house up to four stories need none. Read at chicago.gov, 2026-08-11.

This page is one of the pages under the Chicago window permits hub. How every claim here is sourced, and what this site refuses to publish, is set out on the methodology page.

What the Express Permit Program actually is

It is a permit route, not a permit exemption. That distinction decides whether this page is relevant to you at all. The Department of Buildings publishes a list of work needing no building permit, and a great deal of Chicago window replacement sits on it. The Express Permit Program is what you use when your job is not on that list and still fits inside a narrow, pre-defined shape the city is willing to approve without a full plan review.

The program launched on November 6, 2023, replacing the Easy Permit Process. Anyone quoting you Easy Permit Process procedure in 2026 is working from a retired program name, which is itself a useful signal about how current their information is.

Within the program, windows have their own worktype: Exterior Window or Door Replacement. It covers windows, exterior doors and skylights together, which is why the city's wording keeps naming all three even when your job is windows only.

Express Permit Program overview and the Exterior Window or Door Replacement instructions, read at chicago.gov 2026-08-11.

What is eligible, in the city's own words

Every row below is quoted exactly. The city groups the first three as eligible outright, and the fourth under a condition, which is the sentence that decides whether you are hiring a design professional.

Eligible work, as the city words it	Condition
"Replacing a window in an existing wall opening in a building up to 7 stories tall"	None stated
"Replacing an exterior door in an existing wall opening with the same type of exterior door in a building up to 7 stories tall"	None stated. Note "the same type of exterior door", which is a same-type condition the window row does not carry
"Replacing a skylight in an existing roof opening in a building up to 7 stories tall"	None stated
"Performing similar work in a building taller than 7 stories"	"With drawings prepared by an Illinois-licensed architect or structural engineer"

Source: City of Chicago, Express Permit Program, Exterior Window or Door Replacement instructions. Read at chicago.gov 2026-08-11.

Two words in that table do a lot of work. Existing rules out anything that creates an opening. Up to sets a height line at seven stories, above which the route stays open but the paperwork changes. Everything else on this page follows from those two.

The seven-story line, and when an architect or structural engineer comes in

This is the question homeowners ask most often about the Express route, and the honest answer is narrower than most people expect.

The city publishes exactly one design-professional trigger inside this worktype. A building taller than seven stories. There, the eligible list reads "With drawings prepared by an Illinois-licensed architect or structural engineer: Performing similar work in a building taller than 7 stories". Below that height, the Express instructions ask for no architect and no engineer at all.

Your building	Design professional required by the Express window instructions?
Bungalow, two-flat, three-flat, greystone, small courtyard building	No. And in most cases no permit is required either, so the question does not arise
Any building up to seven stories, replacing windows in existing openings	No. The city states no condition on those three eligible rows
Any building taller than seven stories	Yes. "Drawings prepared by an Illinois-licensed architect or structural engineer"
Any job that changes the size of an opening, at any height	Not answered here. The job is outside the Express route entirely, so a different permit type applies and its requirements were not read at source

Rows one to three quote or apply the Express instructions, read at chicago.gov 2026-08-11. Row four states a gap rather than filling it.

What the drawings have to show

The city does not publish, on the Express pages, what those architect or engineer drawings must contain. We looked, and we are not going to invent a scope of work for a licensed professional you would be paying. Ask the Department of Buildings what the Express submission expects for a building above seven stories before you commission anything, and ask the design professional to confirm they have filed this worktype before.

The landmark exception to that answer

On landmark property, drawings enter the picture from a different direction and at any height. The Commission on Chicago Landmarks publishes a submission checklist whose new-windows addendum asks for "Large-scale side-by-side drawings of the existing and proposed windows for each window type, including elevations, cross and longitudinal sections, and details, as necessary, all dimensioned and to scale". The same checklist notes an off-ramp that saves real money: "Manufacturer's product cut sheets, depending on their scale, completeness, and level of detail, may be accepted in lieu of drawings of the proposed windows." Separately, it lists, "For some projects per Commission staff direction", a "licensed engineer's report".

Read that carefully. The Commission does not say who must prepare the drawings, and it does not say an engineer's report is standard for windows. It says staff may direct it on some projects. That is a Commission requirement on landmark property, not a Department of Buildings Express requirement, and the two are separate documents that this site does not merge for you. The landmark districts page covers that route in full.

Commission on Chicago Landmarks, Permit Application Submission Requirements, document dated December 5, 2024. Read at chicago.gov 2026-08-11.

What is not eligible, and what each item actually rules out

The city publishes five not-eligible items. The left column is quoted exactly. The right column is our reading of what it means for a homeowner, labelled as a reading rather than a rule.

Not eligible, as the city words it	What it rules out in practice
"Creating a new opening in an exterior wall or roof for a new window, door, or skylight"	Any job that adds a window where there was not one, including turning a wall into a patio door. There is no existing opening to replace, so the whole premise of the worktype fails
"Replacing a window or door that has or is required to have fire-rated glass"	Two separate limbs. A window that already has fire-rated glass, and a window that ordinary glass sits in today but which the code requires to be fire-rated. The second limb is the trap, because you cannot see it by looking
"Replacing a window or door within 10 feet of a fire escape"	A measurement, not a judgement call. If the building has a fire escape, measure to it before assuming this route is open
"In a building with more than 3 stories, replacing a window in a wall that is within 2 feet of a lot line that separates two properties"	Bites only above three stories. A three-flat is not described by it. A four-story or taller building with windows in a side wall close to the neighbouring lot line is, and Chicago's narrow lots make that a live case
"Installing a new window, door, or skylight that does not meet minimum energy efficiency requirements of the Chicago Energy Transformation Code"	The unit itself can disqualify the application, independent of the building. This is a product specification question, settled before ordering, not after

Quotations from the Express Permit Program, Exterior Window or Door Replacement instructions, read at chicago.gov 2026-08-11. The right column applies them and is our reading.

On fire-rated glass, an honest gap

Which windows are "required to have" fire-rated glass is set by the Chicago Construction Codes, which this site has not read at source. So this page reports the eligibility rule and stops there. Ask the Department of Buildings, and be specific about the wall you are describing: its distance to the lot line, what is on the other side, and whether the wall is a party wall. A contractor who answers that question confidently without checking is guessing on your behalf.

What the city requires with every application

The Express instructions list what an application under this worktype needs. Short list, but the first row changes who is doing the filing.

Requirement	Applies to	What it means for you
A licensed general contractor, contractor class set by project cost	Every application	The city lists contractor classes A to E selected by the cost of the project. Confirm your contractor holds the class your project cost requires, and confirm it before signing, not after
"Existing condition photograph (at least 1)"	Every application	Take your own photographs of every window before anyone touches them. They cost nothing and they are the only record of what was there
"Energy and water efficiency compliance form"	Every application	The energy specification is part of the permit file, not an afterthought. See the energy code page
"Condominium association approval letter"	Condominium property	The association gates the city filing. If the board has not said yes in writing, the application is not ready. See the condo and high-rise page

Express Permit Program, Exterior Window or Door Replacement instructions, read at chicago.gov 2026-08-11.

The contractor requirement is the one with consequences. A licensed general contractor is listed as required for every application under this worktype, which means window work through the Express route is not a homeowner do-it-yourself filing. We did not read a self-certification route or a homeowner-applicant exception at the source, so this page does not publish one. If someone tells you a homeowner can file this themselves, ask them to show you where the city says so.

The terms you agree to when the permit is issued

The Express Permit Program publishes separate terms and conditions for this worktype. They bind the work, not just the paperwork, and they are more specific than most homeowners expect. These four are the ones that touch what you buy.

"This permit only authorizes installation of replacement skylights, windows, and doors in existing openings in the exterior walls or roof of the building. This permit does not authorize creation of any new openings... This permit does not authorize any increase or decrease in the size of existing wall or roof openings."

"A window or skylight installed under this permit must have an equal or greater area of transparent or translucent glazing as the window or skylight it replaces."

"In a residential building, a replacement window installed under this permit may not have less openable area than the widows it replaces." (The city's own page reads "widows". Quoted as published, sic, rather than silently corrected.)

"In a residential building, a replacement window installed under this permit must include opening control devices that limit the opening to less than 4 inches within 42 inches above the floor when the windowsill is less than 36 inches above the floor..."

Express Permit Program, Exterior Window or Door Replacement terms and conditions. Read at chicago.gov 2026-08-11. The ellipsis is where the city's clause continues past what is quoted here.

Turning those terms into a purchase specification

Two of those clauses are quiet money. Replacement units are fitted inside the existing frame or opening, so frame thickness can reduce both the glass area and the amount of the window that opens. The city sets a floor under both, and the floor is your existing window. That gives you three sentences worth putting in writing before you sign anything.

• Ask for the glazing area of the proposed unit against the existing one. The permit terms require "an equal or greater area of transparent or translucent glazing" than what it replaces. A quote that does not state the glass area cannot be checked against that.
• Ask for the openable area, separately. Glass area and openable area are different measurements, and in a residential building the terms say the replacement "may not have less openable area" than what it replaces. This is where a like-for-like swap can quietly fail.
• Ask who supplies the opening control devices. In a residential building the terms require them where the windowsill sits less than 36 inches above the floor. That is an ordinary condition in Chicago bedrooms and front rooms, and it is a hardware line item that does not belong as a surprise on a change order.

The city publishes no tolerance on either area, so this page publishes none. Equal or greater is what it says.

What the process looks like, and where our reading stops

Here is what the city's own pages establish about the shape of an Express window application, and, just as importantly, what they do not. This site does not narrate a process it has not read.

Question	What the source establishes
Which worktype applies	Exterior Window or Door Replacement, a dedicated Express Permit Program worktype covering windows, exterior doors and skylights in existing openings
Who files	A licensed general contractor is listed as required for every application, class set by project cost. No homeowner-applicant route was read at source
What gets uploaded	At least one existing condition photograph and an energy and water efficiency compliance form, plus a condominium association approval letter on condominium property
What the permit then allows	Replacement in existing openings only, with no new openings and no change in opening size, and with the glazing, openable area and opening control device terms above
Landmark property routing	The Commission publishes that no additional City permit is required for landmark buildings and that the Department of Buildings routes permit applications to Commission staff inside the normal building permit process. Whether the Express worktype itself is open to landmark property is not published either way
The fee	Not read at the agency. No figure published on this site
How long it takes	Not read at the agency. No estimate published
Whether an inspection follows	Not read at the agency. Ask the Department of Buildings and ask your contractor to put the answer in the contract

Express Permit Program pages and Commission on Chicago Landmarks publications, read at chicago.gov 2026-08-11. Rows marked not read are gaps in our reading, stated rather than filled.

You may not need this page at all

This site is paid a referral fee when a homeowner asks to be matched with a window contractor, which is set out in full on how we make money. So it is worth being blunt about how narrow this page's audience is.

• If no permit is required, none of this applies. Chicago's published list of work needing no building permit includes, in a residential building up to four stories above grade, "Repairing or replacing (in-kind) an exterior window or skylight in the existing opening". That is most of Chicago's bungalows, two-flats, three-flats and greystones. No permit means no Express application, no contractor class question, no uploads.
• Repairs and glass are exempt in any building, at any height. "Repairing damage to an existing window or exterior door" and "Replacing glass in an existing window sash or door frame" are both on the exempt list, as are storm windows and insect screens. One failed sash is not a whole-house project.
• If your job is out of scope, this route is not your route either. A new opening, a widened opening, fire-rated glass, a fire escape within 10 feet: each of those puts you outside the Express program rather than inside it. This page is for the band in the middle, where a permit is required and the job still fits the city's narrow replacement shape.
• An exemption from the permit is not an exemption from the code. Chicago states that work performed without a permit "must still comply with all applicable requirements of the Chicago Construction Codes". Nobody inspects an exempt job, which is exactly why the specification you sign matters more, not less.

Guide to Building Permits, work not requiring a building permit, exterior worktype. Read at chicago.gov 2026-08-11. Start at do I need a permit if you have not settled that question yet.

What an Express permit costs

No figure appears here, and that is a decision rather than an oversight. We did not read a Department of Buildings fee for the Express window worktype at the agency that charges it, and this site's rule is that a government fee is quoted from the agency or not published at all. A number lifted from a contractor's blog or a search summary is not a source, and a wrong permit fee is the kind of error nobody catches for years.

What to do instead. Ask the Department of Buildings what the fee is for your scope, because the contractor class is set by project cost rather than by window count, so two jobs with the same number of windows can sit in different classes. Ask your contractor for the permit receipt when the job is done, not a line item on an estimate. And settle the prior question first: if the work is in-kind replacement in existing openings in a residential building up to four stories above grade, and the property is not landmark property, the city's own list says no building permit is required, and a fee for a permit nobody has to file is not a fee.

What we could not confirm

Four things a homeowner might reasonably want are missing from this page, because the city does not publish them where we read and we do not fill gaps with inference dressed as fact.

• Whether landmark property may use the Express Permit Program for windows. The word landmark appears zero times across the Express window instructions, the Express window terms and conditions, and the program overview. The city publishes no statement either allowing or excluding it. Any page that tells you the answer is reading a source we did not find, or making it up.
• What the architect or engineer drawings must contain above seven stories. The condition is published. The content of the submission is not, on these pages.
• The fee, the processing time, and whether an inspection follows. None of the three was read at the agency, so none is estimated here.
• Which windows are required to have fire-rated glass. That sits in the Chicago Construction Codes, not on the Express pages, and we have not read the code text at source.

Where to go next

• Do I need a permit? The question that comes before this one, and the one that ends the process for most Chicago homeowners.
• Landmark buildings and landmark districts. The route that overrides everything else, including what the Commission expects you to submit for window work.
• The condo and high-rise page. If you own a condominium, that is where this site covers the association approval letter, who owns the window under the declaration, and why the four-story line hits condo owners hardest.
• Energy code requirements for replacement windows. The Chicago Energy Transformation Code is named inside the Express eligibility rules, and the compliance form is a required upload.

Sources

All read at chicago.gov on 2026-08-11: Express Permit Program, Exterior Window or Door Replacement instructions; its terms and conditions; the Express Permit Program overview; work not requiring a building permit, exterior; Commission on Chicago Landmarks permit application submission requirements, dated December 5, 2024; Commission questions and answers; landmarks permit review. No competitor page, contractor blog or search summary informed any statement above.

If you want real quotes to hold against these rules, the form below passes your details to an independent licensed window contractor working in your part of the city. What that relationship is, and is not, is set out on the about page.

Straight answers

Questions Chicago homeowners ask

What is the Chicago Express Permit Program?

It is the city's streamlined route to a building permit, and it carries a dedicated worktype for windows called Exterior Window or Door Replacement. Chicago describes it as offering "a streamlined way to obtain a building permit for replacement of doors, windows, and skylights in existing exterior wall and roof openings". The program launched on November 6, 2023, replacing the Easy Permit Process. It is a way to get a permit faster, not a way to get less scrutiny of the work: the permit carries binding terms and conditions covering openings, glazing area, openable area and opening control devices. Read at chicago.gov, 2026-08-11.

Is my window replacement eligible for the Express Permit Program?

The city lists as eligible "Replacing a window in an existing wall opening in a building up to 7 stories tall", along with the same work for exterior doors and for skylights in existing roof openings. Above seven stories the work is still eligible, but only "With drawings prepared by an Illinois-licensed architect or structural engineer". Five things are listed as not eligible: creating a new opening, a window or door that "has or is required to have fire-rated glass", work within 10 feet of a fire escape, a window in a wall within two feet of a lot line separating two properties in a building with more than three stories, and a unit that does not meet the minimum energy efficiency requirements of the Chicago Energy Transformation Code. Read at chicago.gov, 2026-08-11.

Do I need an architect or a structural engineer to replace windows in Chicago?

For the Express window worktype, the city publishes exactly one trigger: a building taller than seven stories. There, the eligible list reads "With drawings prepared by an Illinois-licensed architect or structural engineer: Performing similar work in a building taller than 7 stories". Below that height the Express instructions do not ask for a design professional at all. Two honest limits on that answer. The city does not publish, on these pages, what those drawings must contain. And a job that enlarges an opening is outside the Express route entirely, because its terms bar any change in opening size, so a different permit route applies whose drawing requirements were not read at source and are not stated here.

Can I make the window bigger under an Express permit?

No. The terms are explicit: "This permit does not authorize any increase or decrease in the size of existing wall or roof openings." The same terms say the permit "only authorizes installation of replacement skylights, windows, and doors in existing openings" and "does not authorize creation of any new openings". If your design widens, heightens or shortens an opening, or puts a window where there was not one, the Express route is not the route. Ask the Department of Buildings which permit type covers it before anyone orders glass.

What does the city require me to upload with an Express window application?

For every application under this worktype the city lists a licensed general contractor, with the contractor class set by project cost, plus two uploads: an "Existing condition photograph (at least 1)" and an "Energy and water efficiency compliance form". Condominium property adds a third, a "Condominium association approval letter". The contractor requirement is the part with the practical consequence: this is not a homeowner do-it-yourself filing route for window work, and no self-certification or homeowner-applicant exception was read at the source. Read at chicago.gov, 2026-08-11.

What does an Express permit cost?

We publish no figure, because we did not read one at the agency that charges it. This site quotes a government fee from the agency or not at all, and a number copied from a contractor blog or a search summary is not a source. Ask the Department of Buildings what the fee is for your scope and your contractor class, and ask your contractor for the permit receipt at the end of the job rather than a line item on an estimate. Test the prior question first: on an in-kind replacement in existing openings in a residential building up to four stories above grade, on a property that is not landmark property, the city's own list says no building permit is required at all.

Can a landmark building use the Express Permit Program for windows?

Chicago does not say. We read the Express window instructions, the Express window terms and conditions, and the program overview, and the word landmark appears on none of them. What the Commission on Chicago Landmarks does publish is that landmark work needs no extra City permit, because the Department of Buildings routes permit applications to Commission staff inside the normal building permit process. That tells you how review happens, not whether the Express worktype is open to landmark property. Ask the Historic Preservation Division at 312.744.3200 or landmarks@cityofchicago.org before filing anything.