Picture and fixed windows in Chicago, and the trade you are making

A picture window is a fixed unit: one light of glass in a frame, with no sash that opens. That is the whole trade. You gain the parts a moving window has to compromise on, because there is no operating hardware to fail and no seal that has to stay loose enough to slide. You give up every bit of openable area in that opening, which is the question to settle before a fixed unit goes anywhere near a room somebody sleeps in. Chicago adds a documented warning of its own. The Chicago Bungalow Association's design guidelines tell owners not to "Replace existing double hung or casement windows with single fixed glass picture or slider windows" (guidelines dated 6/21/2012, read 2026-08-11). Changing type also costs you the city's no-permit exemption, which covers in-kind replacement using elements "of the same type, size, and shape" (chicago.gov, read 2026-08-11).

This page sits under the window types hub, which compares every type against the openings Chicago's housing stock actually has. How every claim here is sourced, and what this site refuses to publish, is set out on our methodology page. Two standing notes for this page in particular. Where it describes how a fixed unit or a combination unit is built, that is a general description of a window type and is labelled so, and it carries no figure. And this site has not read Chicago's rescue and escape opening provision at a primary source, so it publishes no dimension anywhere. That omission is the subject of its own section below rather than a footnote.

Picture, fixed, direct-set: the words a quote will use

"Fixed" is the property. "Picture" is a size and a position. A quote may use either word for the same product, or use one of them for something quite different from what you pictured, so it is worth pinning the vocabulary before the numbers arrive. The table below is a general description of how these terms are used in the trade. It is not a Chicago rule and it is not a definition this site read at a source.

The term	What it describes	Where you meet it in Chicago
Picture window	The large fixed light that carries a room, usually the widest single piece of glass in the wall	Front rooms, and the centre of many bay assemblies
Fixed sash	A non-opening sash built to match the profile of the operable units beside it, so the group reads as one composition	Ribbon groups where only the outer units open
Direct-set or direct glaze	Glass set straight into the frame with no sash at all, so the sightline is thinner	Modern replacement units, and transoms
Transom	A fixed light sitting above a window or a door	Above two-flat and three-flat entries, and above bungalow front groups
Sidelite	A narrow fixed light beside a door or a window	Entry assemblies
Fixed casement	A unit built on an operable frame profile but with no crank fitted	Combination assemblies where one leaf is deliberately not opened

A general description of window types, not a sourced Chicago claim. The practical consequence is narrow and useful: two quotes can both say "fixed" and describe different products, so ask for the unit type, the frame construction and the finished visible glass dimension in writing.

The performance advantage, stated as mechanism and not as a number

Fixed units have a reputation for sealing better than anything that opens. This site is not going to confirm or deny that with a figure, because no primary source for an air-infiltration rate, an air-leakage class, a U-factor, a solar heat gain figure or an energy-saving number was read for this page. What follows is mechanism. Every row is a general description of how fixed units are built, and none of it is a measurement of any product.

The feature	What follows from it	What to ask for in writing
No sash that moves	The perimeter seal never has to open, so it is not a wear surface the way a sliding or compression seal is	How the glass is retained and sealed into the frame
No operating hardware	No crank, lock, balance, hinge or roller to adjust, seize or replace later	Nothing, and that is the point. Check the warranty is not written around hardware you will not have
No meeting rail or meeting stile	For the same rough opening, more of the area is glass and less of it is frame	The finished visible glass dimension, not just the unit size
No screen	Nothing between you and the view, and nothing to store or repair	That the quote has not priced a screen you will never receive
One large sealed glass unit	When a seal fails, the failure is the whole light rather than one sash of two	Glass-only replacement terms, and whether the light can be reglazed in place
More glass weight in one piece	The opening, the head and the sill carry more, and on vintage Chicago stock that is a real question	How the head and sill are supported, and who inspected them before quoting
No ventilation path	The air changes for that room have to come from somewhere else in the room	What else in that room opens, listed by the contractor before the order

Every row above is a general description of the window type. This site publishes no air-infiltration, air-leakage, U-factor, solar heat gain or energy-saving figure for a fixed unit, because none was read at a primary source. It also publishes no maximum size, maximum glass area or weight threshold, for the same reason.

One Chicago-specific thing does carry a source, and it is the one to hold a quote to. The city's Express Permit Program lists as not eligible "Installing a new window, door, or skylight that does not meet minimum energy efficiency requirements of the Chicago Energy Transformation Code", and every Express application requires at least one existing-condition photograph and an energy and water efficiency compliance form (chicago.gov, read 2026-08-11). So there is a city-side energy requirement attached to this work and a form on which somebody has to state that the unit meets it. The requirement itself, quoted from the adopting ordinance, is on the energy code page and is not restated here.

The openable-area question, and the sentence this site will not write

This is the section that matters more than the rest of the page put together, so it is worth being blunt about what is known and what is not.

What is certain is a definition rather than a rule: a fixed unit has no openable area, because nothing in it opens. Put one where an operable window used to be and the openable area of that opening goes to zero. That is arithmetic about the type, not a measurement of your house.

What this site does not know is what Chicago requires. Whether a given room has to keep a rescue and escape opening, at what net clear dimension, at what sill height, and which rooms the provision reaches, is set by a code provision that was not read at a primary source for this site. Under the rules on our methodology page, a rule we have not read in full does not get restated from anywhere else. So no dimension, no minimum openable area and no sill height appears on this page or on any other page of this site.

What to do instead, in order:

• Ask the Chicago Department of Buildings whether the room you are describing requires a rescue and escape opening, and get the answer with a section reference.
• Ask the contractor to show you the provision they are relying on, by section number, in writing. A contractor who can produce it is telling you something useful. One who answers "it will be fine" is telling you something too.
• Count what still opens in that room after the change. If the window being replaced is the only one in the room that opens, a fixed unit removes the last one, and that is worth knowing before an order is placed rather than after.
• Price a combination unit alongside the picture unit. A fixed centre light with operable units beside it is the usual way to get the glass without surrendering the opening, and it is covered in its own section below.

Two of the city's Express Permit Program exclusions touch large glass more often than they touch a small sash, and both are worth checking before you specify. The programme does not cover "Replacing a window or door that has or is required to have fire-rated glass", and it does not cover "Replacing a window or door within 10 feet of a fire escape" (chicago.gov, read 2026-08-11). Chicago's older flats and courtyard buildings carry fire escapes on elevations where a large view window is exactly what somebody would want. Nothing read for this site distinguishes a fixed unit from an operable one in either exclusion, so treat them as applying to both.

Where a fixed unit genuinely belongs in Chicago

There are real openings in this city where fixed is the right answer and an operable unit would be worse. They have something in common: nobody needs to reach the sash, nobody sleeps behind it, and the opening is not carrying the ventilation for a room on its own.

The opening	Why fixed fits	What to settle first
The centre light of a bay	Bay centres are commonly fixed with operable units flanking them, so the opening still ventilates	The unit count in the bay, and which of the flanking units open
A transom over a door or a window	Too high to reach, and not intended to operate in the first place	Whether the transom is original, and whether the elevation faces the street
A stair landing or a hallway light	No sleeping use, and usually no reachable sash	Whether it is the only opening on that elevation
A gable or attic light on a non-street elevation	Small, high, rarely reachable, and away from the face the guidance protects	The bungalow guidelines name attic windows on street-facing elevations specifically, so establish which elevation yours is
A view opening in a rear addition or rear wall	Rear elevations sit outside the "visible from public rights-of-way" language that drives landmark review	Landmark district status regardless, because designation reaches the property and not only the front
An opening that already holds a fixed unit	Like-for-like keeps the job inside the city's in-kind wording	That the replacement matches type, size and shape, stated in writing
A high-rise perimeter opening built fixed	Set by the original building design rather than by you	Your declaration, before anything else. See the ownership section

The in-kind wording and the exemption lists are the city's, read at chicago.gov 2026-08-11. The significant-features language is from the City of Chicago's East Village District landmark designation report, read 2026-08-11. The attic window line is from the Historic Chicago Bungalow Association design guidelines dated 6/21/2012, read 2026-08-11. Applying them row by row is our reading, and the Department of Buildings decides permit questions.

Where the Chicago guidance names this swap out loud

Chicago is unusual in having published guidance that names this specific window type as a mistake. The Chicago Bungalow Association's design guidelines carry a "Don't" list, and the fixed picture unit is on it:

• Do not "Replace existing double hung or casement windows with single fixed glass picture or slider windows". That is the line as written. It groups the fixed picture unit and the slider together as the same mistake, and it names both of the types that are original to the bungalow as the things being lost.
• Do not "Install glass block in-fill windows on the street facing elevations". Glass block is a different product from a picture window and it is on the list for the same reason: it is a fixed, non-operating infill replacing an operable sash on the face of the building.
• Do not "Enlarge or reduce window openings to fit a stock window frame or change the shape of the window frames". This is the line that costs the most money, and it lands on picture windows hard, because enlarging an opening is exactly how a big fixed light usually gets in.
• Do not "Remove art glass windows". On a polygonal bay this is not hypothetical. The National Park Service documentation records that Chicago bungalows with a polygonal bay "often use the bay as a focal point on which to showcase art glass windows", which is the same bay a picture window is most often proposed for.

The association's positive list points the other way and is just as specific. Retain and repair original frames, "Maintain historic muntin/grille pattern", "Restore or recreate art glass windows", and "Add thin profile wood or metal storm windows and screens similar in size, shape and color to existing windows". A replacement quote will not volunteer that last option, and it is a real one.

Historic Chicago Bungalow Association Design Guidelines dated 6/21/2012, read in full at a third-party mirror hosted by oldnorthend.org, with the association's own live windows page carrying the same language. National Park Service, Chicago Bungalows Multiple Property Documentation Form, prepared by Daniel Bluestone. All read 2026-08-11. The guidelines are cited from a mirror and we say so rather than hide it.

The caution reaches past bungalows. The city's East Village District landmark designation report records original double-hung sash across a neighbourhood of brick and greystone flats, and the recommended significant features for that district were "all exterior building elevations, including rooflines, visible from public rights-of-way". That is the language that puts a street-facing window inside review. On a greystone there is a further problem the guidance does not have to spell out: the opening is cut into dimensional Indiana limestone with carved sills, lintels and surrounds, so the opening is itself a piece of the ornament, and sizes are not standardised across the type. Widening one to take a larger fixed light is visible from the street, permanent, and impossible to undo.

City of Chicago, East Village District landmark designation report, read 2026-08-11. The limestone description is from the Chicago Architecture Center. The greystone reading is ours and is labelled as a reading rather than a rule.

Combination units, which is how most Chicagoans actually buy fixed glass

A combination unit is two or more units joined inside one frame by a mullion, so a fixed light and one or more operable units read as a single window. That is a general description of the type. In Chicago it is not an upgrade or a novelty, it is the normal front elevation, which is why this section matters more here than it would in a national guide.

The National Park Service documentation for Chicago bungalows describes the flat bay this way: "When paired with an offset porch, the flat bay generally features one set of ribbon windows in a grouping of three or four windows into a single architectural frame." It names four bay types, flat, square, polygonal and curved. So the typical bungalow front opening is already a combination: several units in one architectural frame, on the one elevation everybody sees.

The assembly	What it is	Where it shows up in Chicago
Ribbon group of three or four	Units side by side in a single architectural frame, documented for the bungalow flat bay	Bungalow fronts, paired with an offset porch
Bay	Units set at angles, projecting past the wall, the centre often fixed and the flankers operable	Bungalows, and repeated by floor on two-flats and three-flats
Bow	Four or more units in a shallow curve	Larger front rooms
Fixed centre with operable flankers	A picture light in the middle with a casement or a double-hung each side	The common modern answer to a wide opening, and the one that keeps the room ventilated
Fixed with a transom above	Fixed over fixed, divided by a horizontal mullion	Tall entry walls and stair openings
Fixed upper, operable lower	The reachable half opens and the unreachable half does not	Openings where the head is out of reach from the floor

The four bay types and the ribbon grouping are quoted from the National Park Service, Chicago Bungalows Multiple Property Documentation Form, read 2026-08-11. Everything else in the table is a general description of how combination units are built.

Three things follow, and they are the ones homeowners find out too late.

• A per-window price stops meaning anything. If the front group is three or four units in one frame, one estimator may count it as one window and another as four. Two totals for "the front" are not comparable until you know the count each one used.
• The mullion is a frame member sitting in the middle of your glass. Every joint between units adds width to the sightline and a place condensation shows up first. Ask for the finished visible glass dimension for the whole assembly, not the unit sizes.
• Factory-mulled and field-mulled are different products. One arrives as an assembly. The other is joined on site. They fail differently, they are warranted differently, and one line in a quote tells you which you are buying. Ask who warrants the mull joint itself, because it is frequently neither the glass warranty nor the installation warranty.

Combination units are also the honest answer to the openable-area problem above. If the reason for the picture window is glass and light, a fixed centre with operable flankers delivers most of the glass and keeps an opening in the room. If the reason is a lower price, read the cost section below first, because nothing read for this site establishes that fixed glass is the cheap option. The bay and bow forms in particular have their own page at bay and bow windows, including what the pressed-metal bay documented in the city's East Village report does to the job.

What choosing a fixed unit does to your permit

This is the table to read before a showroom visit. A type change is the easiest way for an exempt job to become a permit job without anyone saying so out loud, and a picture window is almost always a type change.

The job	Inside the city's in-kind wording?	What follows
Fixed unit out, new fixed unit in, same opening, same size and shape	Yes. Same type, size and shape	On the no-permit list in a residential building up to four stories above grade
Double-hung or casement out, picture unit in	No. The type changes	Outside the exemption wording. Treat it as a permit job, and note the bungalow guidelines name this swap
Glass replaced in an existing fixed sash	Not a replacement of the window at all	On the any-building no-permit list, at any height
A ribbon group of three or four replaced with one large picture unit	No. The type changes and the composition does, and usually the size too	Outside the exemption. This is the change landmark review exists to catch on a street elevation
Opening enlarged or squared off to take a bigger light	No. The size or the shape changes	Outside the exemption, and named in the bungalow guidelines as something not to do
A new opening cut for a picture window	No. There was no existing opening	Not eligible for the Express Permit Program either. A full permit job
A fixed unit that has or is required to have fire-rated glass	Not the question. The exclusion is separate	Not eligible for the Express Permit Program
Any of the above in a building above four stories	The four-story exemption does not reach it	Express Permit Program up to seven stories, or taller with drawings from an Illinois-licensed architect or structural engineer
Any of the above on landmark property or in a landmark district	The city says its exceptions "may not apply". Settle that question before anything else

City of Chicago, work not requiring a building permit, exterior, and Express Permit Program, exterior window or door replacement. Both read 2026-08-11. The wording in the middle column is the city's; applying it row by row is our reading, and the Department of Buildings decides permit questions. Full treatment on do I need a permit and the Express Permit Program page.

One more Express exclusion is worth checking on a narrow Chicago lot, because a big view window often ends up on a side wall. The programme does not cover, "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" (chicago.gov, read 2026-08-11). If your building is over three stories and the wall is that close to the line, the streamlined route is off the table whichever type you pick.

Cost position, and the type the publishers disagree about most

Fixed glass is widely assumed to be cheap, on the reasoning that a window with no hardware should cost less than one with hardware. Nothing read for this site supports that, and the spread between publishers on this one type is the widest in the whole set. Every band below is national. None of them is a Chicago figure.

Source and date	Picture	Double-hung	Casement
Modernize national guide, Catie Bonner, reviewed by Isabella Andersen, March 17, 2026	$600 to $1,900	$429 to $915	$597 to $1,273
This Old House, Stephanie Minasian-Koncewicz, June 23, 2026	$419 average	$495 average	$560 average
Today's Homeowner, Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025	$700 to $1,300	$430 to $915	$500 to $1,000
Bob Vila, Katie Flannery and Evelyn Auer, June 10, 2024	$65 to $700	$150 to $650	$150 to $1,000
This Old House wood guide, Stephanie Minasian-Koncewicz, April 13, 2026	$640 to $1,750, average $1,195	$325 to $950, average $637.50	$410 to $2,450, average $1,430

Every row above read 2026-08-11, and every row is national.

Four readings, and we label them as readings.

• The disagreement is extreme, and that is the finding. Bob Vila's floor is $65 and Modernize's ceiling is $1,900. That is roughly a 29-fold spread on one word. Two guides that far apart do not average into a number worth planning with.
• One publisher disagrees with itself. This Old House reports a $419 picture average in its June 23, 2026 guide and a $1,195 picture average in its April 13, 2026 wood-only guide, both authored by Stephanie Minasian-Koncewicz. That is not an error. It is two different bases, one covering all materials and one covering wood alone, and it is a reminder that a bare average tells you nothing until you know what it averaged.
• "Fixed is cheaper because it does not open" is not established. Three of the five sources put picture at or above double-hung. Only Bob Vila, the oldest source here, puts it clearly below. If a Chicago quote prices a picture unit below a double-hung, that is a fact about that quote, not about the type.
• There is no Chicago picture window figure at all. The one publication read for this site that prices Chicago by name is Modernize's Illinois page (Isabella Andersen, reviewed by Catie Bonner, March 18, 2026), which puts Chicago standard vinyl double-hung at $650 to $1,200 per window installed and energy-efficient vinyl at $700 to $1,250. It prices no picture or fixed window. So this page prints no Chicago figure for this type, and the full type-by-type comparison lives on cost by window type with every source attached.

What this site publishes about federal and utility programmes, and what it deliberately does not, is set out on the financing and programmes page: each programme is named and its administering agency linked, and no amounts are printed anywhere.

You may not need a picture window, and you may not need new windows

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 these cases are worth stating plainly, because a replacement quote is never going to raise them.

• If price is the only reason, the sources do not support it. Three of the five national guides above put picture at or above double-hung, and the fifth is the oldest source in the set. Fixed glass is a choice about how the window works, not a discount.
• If the room needs an opening, a fixed unit removes it. Count what else opens in that room before you order. A combination unit with operable flankers gets you most of the glass and keeps the opening.
• If the opening is street-facing on a bungalow, the guidance names this swap. The "Don't" list covers replacing double-hung or casement with "single fixed glass picture or slider windows", and the front elevation is the one you cannot undo cheaply.
• If the glass is fogged in a sound sash, this may be a glass job. Chicago lists "Replacing glass in an existing window sash or door frame" and "Repairing damage to an existing window or exterior door" as work needing no building permit in any building, at any height (chicago.gov, read 2026-08-11). The repair decision is worked through on repair or replace.
• If the goal is warmth rather than view, a storm window is a real option. Chicago lists installing, maintaining or removing a storm window as work needing no building permit in any building, at any height, and the bungalow guidelines recommend adding "thin profile wood or metal storm windows and screens similar in size, shape and color to existing windows". Covered on the storm window page.
• If the art glass is intact, the failure may be the storm in front of it. The National Register nomination for the Portage Park Bungalow Historic District records art glass in that district hanging "behind protective storm windows in the bays of the primary facade, featuring grids of metal muntins" (read 2026-08-11). Establish which layer failed before anyone prices the whole opening as a picture window.
• If you are in a condominium and have not read your declaration, stop here. You may be pricing something that is not yours to decide.

How to compare two picture window quotes without guessing

Fixed units vary more between products than the word suggests, and combination assemblies vary more still. Ask every contractor the same list and compare the answers rather than the bottom lines.

• Fixed unit or combination assembly, and if it is a combination, how many units and which of them open.
• Type in and type out, named in writing. "Fixed to fixed" is what keeps the permit question simple later. "Double-hung to picture" is a different job on the city's wording.
• The overall frame dimension for the whole group, alongside the unit count, so two quotes for "the front" describe the same thing.
• The finished visible glass dimension, not just the unit size, so you can see what the frame, any insert and every mullion take away.
• Insert or full-frame. One word, and it explains most of the gap between two prices. The two methods are compared on the double-hung page.
• Whether the light can be reglazed in place if the sealed unit fails, or whether a seal failure means replacing the whole frame.
• Factory-mulled or field-mulled, and who warrants the mull joint itself.
• How the head and sill carry the added weight, and who inspected them before the quote was written.
• Whether the opening is being modified. On a vintage Chicago opening this is the question that decides whether the stone or brick gets cut, and it is the question the bungalow guidelines are built around.
• What openable area remains in that room after the change, listed in writing, and which code provision the contractor is relying on.
• Who pulls a permit, and on what grounds. If the job changes type, the city's in-kind exemption is not the answer, so ask what the permit line actually covers.
• The written warranty terms, on the sealed glass unit and on the installation separately. They are usually two documents from two different parties.

Landmark status and condominium ownership override this page

Two designations get confused constantly, and the confusion runs in the expensive direction: people assume a federal listing restricts them and never check the local designation that does.

The National Park Service is unambiguous about the federal side: "Listing in the National Register places no federal restrictions or requirements on a private property owner. You may do with the property as you wish, within the framework of local laws or ordinances." Chicago Landmark designation is the one with teeth. The Historic Preservation Division "reviews all permit applications for work involving designated and proposed Chicago landmarks and landmark districts", the Commission's pre-permit document extends that to anything located within a designated or proposed Chicago Landmark District, the Department of Buildings routes applications to Commission staff inside the normal permit process, and the submission requirements for alteration work expressly name windows among the exterior features you have to describe. Replacing an operable sash, or a whole ribbon group, with a single fixed light on a street elevation is close to the clearest case of a change that review exists to catch.

Ownership is the other override, and in a high-rise it comes first. The Illinois Condominium Property Act sets a default in Section 4.1(a), and that section opens "Except to the extent otherwise provided by the declaration or other condominium instruments". Under the default, "all portions of windows in perimeter walls shall be deemed part of the common elements", and Section 4.1(a)(5) deems such a window a limited common element serving that unit exclusively, with Section 18.4(a) putting replacement of common elements on the board. Section 4(g) requires the declaration to describe how limited common elements are assigned. Declarations routinely move the cost, which is exactly why the declaration is the document that answers this for your building. This matters more than usual on this page, because high-rise perimeter openings are frequently fixed already, and changing one changes the face of the building. A general description of a statute, not legal advice.

National Park Service National Register FAQ; City of Chicago landmarks permit review page and Commission on Chicago Landmarks pre-permit submission requirements (2026); Illinois Condominium Property Act, 765 ILCS 605, effective January 1, 2023, published by the Illinois Department of Financial and Professional Regulation. All read 2026-08-11. Full treatment on landmark buildings and districts.

What we could not confirm, and will not guess

• Rescue and escape opening dimensions. Chicago's provision was not read at a primary source in this pass, so no net clear opening, minimum openable area or sill height appears anywhere on this site. This is the most consequential gap on this page, because a fixed unit has no openable area at all. Ask the Department of Buildings.
• What a picture or fixed window costs in Chicago. No attributed Chicago figure for this type exists in anything read for this site, in any material. Two Chicago contractor pages carry local numbers by type; one shows no author, the other shows neither author nor date and contradicts itself on the same page, and neither prices a picture window in any case.
• How much better a fixed unit seals. No air-infiltration rate, air-leakage class, U-factor, solar heat gain figure or energy-saving number was read at a primary source, so the performance section above carries no figure at all. Compare units on their own published performance labels.
• How large a fixed unit can be built, and at what weight support becomes an issue. Quoted freely in sales material. No primary source was read, so no dimension and no weight appears.
• How long a sealed glass unit lasts. Same position. No primary source, so no figure.
• Any Chicago climate figure. No temperature, freeze-thaw cycle count or heating degree day number was read at source, so none appears.
• What a window job returns at resale in Chicago. A resale return figure circulates widely, attributed to the Journal of Light Construction Cost vs. Value Report. Both publishers returned HTTP 403 to this session, so nothing was read at source, and therefore no return figure is published here.
• Whether changing frame material alone breaks the in-kind exemption. The city does not publish whether material is part of "type". Neither do we.

Related pages

• Bay and bow windows, where the fixed centre light usually lives, and where the unit count has to be settled before any price means anything.
• Double-hung windows, the documented original across Chicago's vintage stock and the type a picture unit is usually replacing.
• Casement windows, the other type named in the bungalow guidelines as original, and the usual operable partner in a combination assembly.
• Window cost by type, where every band names its publication, its author and its date, and the disagreement between publishers is the finding.
• Do I need a permit, carrying both city exemption lists in full and the in-kind definition this page turns on.

Sources

All read 2026-08-11: City of Chicago, work not requiring a building permit, exterior; Express Permit Program, exterior window or door replacement; landmarks permit review; East Village District landmark designation report; National Park Service, Chicago Bungalows Multiple Property Documentation Form; Portage Park Bungalow Historic District nomination; National Register FAQ; Chicago Bungalow Association, windows; Chicago Architecture Center, Chicago Bungalow; Chicago Architecture Center, Limestone; Illinois Condominium Property Act, 765 ILCS 605. Cost figures from Modernize (national guide, Catie Bonner, reviewed by Isabella Andersen, March 17, 2026, and the Illinois page, Isabella Andersen, reviewed by Catie Bonner, March 18, 2026), This Old House (Stephanie Minasian-Koncewicz, June 23, 2026, and the wood guide of April 13, 2026), Today's Homeowner (Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025) and Bob Vila (Katie Flannery and Evelyn Auer, June 10, 2024). No competitor page, contractor marketing page or search-engine summary informed any statement above.

If you want quotes to hold against these answers, 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 difference between a picture window and a fixed window?

In everyday use, size and framing. "Fixed" describes any unit whose glass does not open. "Picture window" usually means the large fixed light that carries a room, most often a living room. A fixed sash built to match the profile of the operable units beside it, a transom over a door, a sidelite, and a direct-set light glazed straight into its frame with no sash at all are all fixed, and none of them is normally called a picture window. That is a general description of how the terms are used in the trade rather than a Chicago rule or a definition this site read at a source. It matters for one practical reason: two quotes can both say "fixed" and describe very different products, so ask for the unit type, the frame construction and the finished visible glass dimension in writing.

Can I put a picture window in my Chicago bungalow?

You can, and the documented guidance for the housing type names that exact swap. The Chicago Bungalow Association's design guidelines tell owners not to "Replace existing double hung or casement windows with single fixed glass picture or slider windows". The same "Don't" list warns against installing glass block infill windows on street-facing elevations, against replacing attic windows with a slider on those elevations, against enlarging or reducing openings to fit a stock frame, and against removing art glass. Read at the association's design guidelines dated 6/21/2012, 2026-08-11. There is a second cost, and it is the city's. Chicago exempts in-kind replacement in an existing opening from a building permit in a residential building up to four stories above grade, and defines in-kind as new elements "of the same type, size, and shape" (chicago.gov, read 2026-08-11). A double-hung out and a fixed unit in is a different type, so the job leaves that exemption.

Can I put a picture window in a bedroom?

This page will not answer that, and the honest reason is worth stating. A fixed unit provides no openable area at all, which is a description of the type rather than a rule. Whether the room you are describing has to keep a rescue and escape opening, and at what size, is set by a code provision this site has not read at a primary source. So this site publishes no dimension, no minimum openable area and no sill height anywhere, on any page. Take that question to the Chicago Department of Buildings, or ask the contractor to show you the specific provision they are relying on, with its section number, in writing. Two practical notes that do not depend on a dimension. If the window you are replacing is the only one in that room that opens, a fixed unit removes the last one. And a combination unit, a fixed centre light with operable units beside it, is the usual way to get the glass without giving up the opening.

Are picture windows cheaper because they do not open?

Not on the evidence read for this site, and this is the window type the national publishers disagree about most. Bob Vila puts picture at $65 to $700 (Katie Flannery and Evelyn Auer, June 10, 2024, the oldest source here). Modernize puts it at $600 to $1,900 (national guide, Catie Bonner, reviewed by Isabella Andersen, March 17, 2026). Today's Homeowner puts it at $700 to $1,300 (Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025). This Old House reports a $419 average in one guide and a $640 to $1,750 range averaging $1,195 in its wood-only guide (Stephanie Minasian-Koncewicz, June 23, 2026 and April 13, 2026). All read 2026-08-11, and every one of them is national. Three of those five put picture at or above double-hung. There is no attributed Chicago price for a picture or fixed window in anything read for this site, so none is published here.

What is a combination window, and how should it be quoted?

It is two or more units joined inside one frame by a mullion, so a fixed light and one or more operable units read as a single window from the street. That is a general description of the type. In Chicago it is not a novelty, it is the normal front elevation. The National Park Service documentation for Chicago bungalows describes the flat bay this way: "When paired with an offset porch, the flat bay generally features one set of ribbon windows in a grouping of three or four windows into a single architectural frame" (read 2026-08-11). So a per-window price is close to meaningless on that elevation until you know how each estimator counted the group. Ask every contractor for the unit count, the overall frame dimension, which units open, whether the assembly is mulled at the factory or in the field, and who warrants the mull joint. Those five answers make two quotes comparable. The totals alone do not.

Do I need a permit to replace a fixed window with another fixed window?

Usually not, if nothing else changes. Chicago exempts, in a residential building up to four stories above grade, "Repairing or replacing (in-kind) an exterior window or skylight in the existing opening", and defines in-kind as using new elements "of the same type, size, and shape". Separately, in any building at any height, the city exempts "Replacing glass in an existing window sash or door frame" and "Repairing damage to an existing window or exterior door". Read at chicago.gov 2026-08-11. So fixed out and fixed in, same opening, same size, same shape, sits inside that wording. Enlarging the opening for a bigger light does not, because the size changes. Nor does replacing a ribbon group with one large picture unit. Landmark property is the exception the city names itself: these exceptions "may not apply" on a designated or proposed Chicago Landmark or in a landmark district.

Is a fixed window actually better in a Chicago winter?

This site will not answer that with a number, because no primary source for an air-infiltration rate, an air-leakage class, a U-factor or an energy-saving figure was read. What can be said honestly is mechanical, and it is a general description of how the types are built. A fixed unit has no sash that moves, so its perimeter seal never has to open and is not a wear surface, and it has no crank, lock, balance or roller to fail. A slider seals along a track its sash has to keep sliding in. A casement pulls its sash against a compression seal when the crank is turned. A double-hung pulls two sashes together at the meeting rail when the lock is thrown. Those are four different arrangements, and only one of them has no moving joint at all. Compare units on their own published performance labels, and note that Chicago requires an energy and water efficiency compliance form with an Express Permit application (chicago.gov, read 2026-08-11).