Wood and clad wood windows in Chicago

Wood is what most of Chicago's pre-war stock was built with, and in a Chicago Landmark district it is often the only material that satisfies the standard your replacement is judged against. The Commission on Chicago Landmarks' adopted Guidelines say that where total replacement is unavoidable, "the replacement windows must match the historic windows in design and operation, material, glass size, muntin arrangements, profiles, and trim such as brick mold and sill". Material is named in that list, which is why a landmark address changes the answer before price is discussed. Read at chicago.gov, 2026-08-11. Outside a landmark district nothing in Chicago requires wood. The price gap is real and it is national: wood runs $600 to $1,500 per window (Today's Homeowner, September 3, 2025) against a Chicago vinyl band of $650 to $1,200 (Modernize Illinois, March 18, 2026). No Chicago price for wood or clad wood exists in anything we read, and this page publishes none.

The sentence that makes wood the landmark answer

The Commission on Chicago Landmarks has no adopted policy on windows. What it has is the Guidelines for Alterations to Historic Buildings and New Construction, adopted March 4, 1992 and still the published version. Its WINDOWS section sets an order of preference in which total replacement is last.

Step	What the Guidelines say, quoted
First	"The first and best answer to the question of how to treat windows is not to replace them but rather to retain and repair the existing sash and frames."
Second	"Where this is not possible, replacing only deteriorated parts an new sill or a sash for instance is preferable to total replacement."
Last	"If total replacement is unavoidable, the replacement windows must match the historic windows in design and operation, material, glass size, muntin arrangements, profiles, and trim such as brick mold and sill."

Commission on Chicago Landmarks, Guidelines for Alterations to Historic Buildings and New Construction, adopted March 4, 1992. Read in full at chicago.gov, 2026-08-11. The second rung is quoted exactly as the city prints it, including the missing words in that sentence.

Seven things are named in that last sentence and one of them is material. That is the whole mechanism. No rule in Chicago says "use wood". The standard says match, and where the historic window was wood, a matching specification is a wood specification. Glass size, muntin arrangements and profiles work the same way, and they are exactly what a stock replacement changes without anyone noticing until the elevation reads wrong from the sidewalk. The Guidelines say so themselves: "Seemingly minor changes in these elements can greatly alter the appearance of an historic building."

The boundary the Guidelines draw, and the one they do not

The 1992 Guidelines do take a position on materials in one place. Their CLAPBOARDS section reads: "Aluminum, vinyl, or other non-traditional siding materials are not appropriate for historic structures." That sentence is about siding. It does not mention windows, and the WINDOWS section names no material as appropriate or inappropriate at all.

So we will not read the siding sentence onto your windows, and neither should a salesperson. Whether a product matches on the seven counts is decided by Commission staff on your submittal, not by us and not by the person quoting you. What triggers review, what you submit, and how to check your address is on the landmark districts page.

Chicago's openings were not built for stock windows

Chicago's openings are grouped, banded and cut into masonry in ways that decide the order before material does.

Building type	What the opening actually is	What that does to a wood or clad order
Chicago bungalow	The front bay carries a band, not a single unit. The federal documentation form describes the flat bay as featuring "one set of ribbon windows in a grouping of three or four windows into a single architectural frame", and notes that bungalows with polygonal bays "often use the bay as a focal point on which to showcase art glass windows"	Units in one frame have to match each other exactly, and the art glass is usually what you work around rather than replace
Two-flat and three-flat	A projecting street-facing bay repeated on two or three floors. The city's East Village District designation report records original double-hung sash and "fine architectural details such as pressed-metal bay windows"	The same detail repeats vertically, so an error repeats too. A pressed-metal bay is a different substrate and flashing problem from brick
Greystone	Openings cut into dimensional Indiana limestone with carved sills, lintels and surrounds. The Chicago Architecture Center describes the stone as "known for its strength, ease of carving and ability to weather gracefully"	The opening is part of the ornament. It cannot be trimmed to a stock size without visible loss, and sizes are not standardized

National Park Service, Chicago Bungalows Multiple Property Documentation Form; City of Chicago, East Village District landmark designation report; Chicago Architecture Center. All read 2026-08-11.

None of that is a niche case. The Chicago Architecture Center puts bungalows at more than 80,000, "which make up 1/3 of our city's single-family housing stock", and two- and three-flat buildings at "a quarter of Chicago's housing". Read 2026-08-11.

The most commercially useful line in any guidance for these buildings is on the Historic Chicago Bungalow Association's "Don't" list: do not "Enlarge or reduce window openings to fit a stock window frame or change the shape of the window frames". Its other prohibitions run the same way, against replacing double-hung or casement sash with fixed picture or slider units on street elevations, against glass block infill there, and against removing art glass. Its "Do" list asks you to "Maintain historic muntin/grille pattern" and to restore or recreate art glass. Those guidelines are dated 6/21/2012, and the association's live windows page puts it in one sentence: "If windows cannot be repaired, replacements should match the historic window as closely as possible." Both read 2026-08-11.

That is a pricing fact, not an aesthetic one. An opening that cannot be resized to fit a stock frame means custom sizes, which is one real reason a wood or clad quote for a bungalow front bay lands above a national per-window band.

One more detail changes the job. The National Register nomination for the Portage Park Bungalow Historic District records that "Most of these art glass windows hang behind protective storm windows in the bays of the primary facade, featuring grids of metal muntins". Read 2026-08-11. So the art glass is often already protected by a storm rather than a sealed unit, and those muntins are metal, which means a quote offering simulated divided lights in a new sash is not describing what is there now.

What wood and clad cost, and none of it is Chicago

This is where we have the least, and saying so is more useful than filling it. There is no Chicago figure for wood, none for clad wood, and none for aluminum-clad in anything we read. Every number below is national.

Source	Wood, per window	Date the source carries
Today's Homeowner, Elisabeth Beauchamp, reviewed by Amy DeYoung	$600 to $1,500	September 3, 2025
This Old House, Stephanie Minasian-Koncewicz, survey average	$567	June 23, 2026
Modernize, Catie Bonner, reviewed by Isabella Andersen	$800 to $1,500 or more	March 17, 2026
Bob Vila, Katie Flannery and Evelyn Auer	$150 to $1,300, average $800	June 10, 2024
Pella, a manufacturer pricing its own category	$1,100 to $2,200 or more	May 14, 2026
Modernize, "Clad Wood Windows", Rob Sabo, reviewed by Catie Bonner	$950 to $1,800, all cladding types grouped together	August 29, 2025

Market observations, all national, all read 2026-08-11. Bob Vila is the only pre-2025 source on this site and is labelled as such. Pella is a window manufacturer quoting prices for its own products, which is useful and is not independent.

Read the wood column down and the disagreement is larger than the decision it is meant to inform. This Old House's survey average of $567 sits below the floor of Modernize's range, and Bob Vila's floor of $150 and Pella's ceiling of $2,200 or more are not describing the same object. Our reading, labelled as ours: those publishers are not pricing the same basis, unit alone against unit installed, and none stated which. That is why this site publishes no blended national average.

One wood source breaks down by type, which matters here because the opening decides the type.

Window type, wood	Range per window	Average
Double-hung	$325 to $950	$637.50
Casement	$410 to $2,450	$1,430
Picture	$640 to $1,750	$1,195
Bay	$1,475 to $5,100	$3,287.50
Awning	$415 to $1,100	Not given
Sliding	$570 to $1,575	Not given

This Old House, "How Much Do Wood Replacement Windows Cost?", Stephanie Minasian-Koncewicz, updated April 13, 2026, citing RSMeans data from Gordian and a 2024 survey of 2,500 homeowners. National, not Chicago. Read 2026-08-11.

The same source gives two whole-house wood scopes: eight to 10 windows at $10,400 to $13,000, and 18 to 20 windows at $23,400 to $26,000. Set those against the Illinois whole-home range of $6,000 to $16,000 for 10 to 15 windows (Modernize Illinois, Isabella Andersen, reviewed by Catie Bonner, March 18, 2026, read 2026-08-11) and you have the honest size of the wood decision. That is a national material scope against an Illinois all-materials scope, not a Chicago wood figure, and it is still the closest sizing check anyone publishes with names on it.

A Chicago-looking figure exists and we are not publishing it. A Chicago-area siding and exteriors contractor's blog, dated March 6, 2026, prices wood combined with other materials for this market, per window, with no named author. It is contractor marketing inside the market this site covers. A second Chicago window company page carries per-type figures with no author, no date, and a whole-house range contradicting another sentence on the same page. Neither is a source this site cites.

What cladding actually changes

Clad wood is one idea with three common skins. The wood stays inside where you see it and where it is dry, and a factory-applied exterior takes the weather. What follows is general product description, because no source we read tests the three against each other.

Cladding	What it changes on the outside	What it does not change
Aluminum-clad	Thinnest and strongest section, so it holds the narrowest exterior sightline. Factory finish rather than a site-applied one	The interior is still wood and still wants an interior finish. A damaged skin is not refinished the way painted wood is
Vinyl-clad	Colour runs through the material rather than sitting on it as a coating	Same interior wood, same sill and bottom-rail exposure inside the assembly
Fiberglass-clad	Takes paint, so an exterior colour change later is a live option	Same interior wood, same maintenance on the inside face

General product description. The only clad price we read, $950 to $1,800 per window, groups all three together and separates none of them (Modernize, "Clad Wood Windows", Rob Sabo, reviewed by Catie Bonner, August 29, 2025, read 2026-08-11).

That last line is the finding, not a footnote. Nobody we read prices aluminum cladding against vinyl cladding. A quote showing a difference between them is showing that company's price list, which is legitimate and is not a market rate you can check. Ask what the difference buys in that product line: sightline width, finish warranty length, colour range, and whether the finish is renewable.

Maintenance, said as material behaviour rather than as a number

This is the argument that decides wood for most people, and the one most likely to be answered with a made-up figure. No source we read publishes a repaint cycle, a maintenance interval or a service life for wood windows, so this page publishes none. We publish no freeze-thaw ranking of frame materials either, because we read no attributable source that measured one. The comparable treatment for the other materials is on cost by frame material.

The mechanism, labelled general material behaviour rather than Chicago measurement: exterior wood depends on a maintained finish, and water does not run off a window the way it runs off a wall. It collects at the bottom of the sash and stands on the sill, which is why those two places fail first and why the 1992 Guidelines name "a new sill or a sash" as the parts worth replacing on their own. Cladding moves that exposure off the outside face and changes nothing on the inside face.

Three questions turn the argument into something written down:

• What is the finish warranty, separately from the frame warranty? On a clad unit the exterior finish and the wood behind it are often covered for different lengths of time, and the headline number belongs to the longest one.
• What voids it? Read the exclusion list, not the summary. Exposure clauses, interior treatments and installation by anyone other than the original installer are common.
• Is the exterior finish renewable? Bare wood you repaint. A factory-applied clad finish generally you do not, so the colour decision is a longer commitment than it looks.

The glass area rule most material comparisons miss

Frame and sash sections differ in thickness between products, so a replacement fitted into an existing opening can finish with less glass than the window it replaced. That is common on vintage Chicago stock, where the original sash is slim. Under the Express Permit Program terms for exterior window and door replacement, a window installed under that permit "must have an equal or greater area of transparent or translucent glazing as the window or skylight it replaces", and in a residential building it "may not have less openable area than the widows it replaces". The misspelling of "windows" is the city's own and we quote it as printed. The same terms say the permit covers existing openings only and "does not authorize any increase or decrease in the size of existing wall or roof openings". Read at chicago.gov, 2026-08-11.

Those terms bind work done under that permit rather than every job in the city, and the route is on the Express Permit Program page. Either way the question belongs on your quote: glass area before and after, per opening. On a bungalow front bay of three or four units in one frame, a small loss per unit is a visible loss across the band.

You may not need new windows at all

This site is paid a referral fee when a homeowner asks to be matched with a window contractor, set out on how we make money. So the cases where the answer is to spend little or nothing get said plainly. On wood windows, the city is on that side.

• Chicago's own adopted guidance says repair first. "The first and best answer to the question of how to treat windows is not to replace them but rather to retain and repair the existing sash and frames." That text is written for landmark property rather than every house, and it is still the city rejecting the automatic replace pitch. Read 2026-08-11.
• The city rejects the energy argument as an automatic reason to replace. The same Guidelines say "properly weather-stripped, single-glazed sash can greatly reduce or eliminate air infiltration between sash and frame where most energy is lost", then: "The cost of weather stripping is nominal compared to the price of replacement windows, yet the effect can be considerable." That is a municipal commission saying the cheap fix may be the effective one.
• Partial replacement is preferred to total replacement. "replacing only deteriorated parts an new sill or a sash for instance is preferable to total replacement" (quoted exactly as the city prints it, missing words included). A rotted sill is a sill job. The one attributable repair figure we read puts rotted frame repair at $250 to $800 (This Old House, Stephanie Minasian-Koncewicz, June 23, 2026, national, read 2026-08-11).
• Repair, reglazing and storm windows need no building permit. All three sit on Chicago's list of work not requiring a building permit, in any building at any height. Read at chicago.gov 2026-08-11. The full list is on do I need a permit. The bungalow guidance names the storm window directly, on its "Do" list: "Add thin profile wood or metal storm windows and screens similar in size, shape and color to existing windows."
• Doing it in stages is allowed. Nothing in the code or the permit rules requires a whole house at once, and on wood pricing that matters more than on any other material. The economics are on repair or replace.

Does it meet the Chicago energy code

Yes, if the unit is rated to. For a residential building up to four stories above grade the city caps a replacement window at a 0.30 U-factor and a 0.40 solar heat gain coefficient, read in Table R402.1.2 of SO2022-2008, the ordinance adopting the 2022 Chicago Energy Transformation Code, 2026-08-11. The table is titled "MAXIMUM ASSEMBLY U-FACTORS AND FENESTRATION REQUIREMENTS", so the cap covers the whole window, frame and glass together, and the code names no material anywhere. It is quoted at length on the energy code page.

One tension is specific to this page. A landmark specification matching historic single glazing and a code requirement of 0.30 on the assembly can pull in opposite directions on the same window. The city publishes no reconciling rule that we found, so we publish none. Take it to Commission staff before you order, and get the answer in writing.

How to buy wood or clad so two quotes can be compared

The general specification checklist is on the materials hub. Four things are specific to wood and clad and belong on the quote in writing:

• Landmark status, settled first. It can decide material, muntin pattern and profile before price is discussed, and it is what homeowners discover last.
• Stock size or made to size, per opening, plus glass area before and after. On bungalow, two-flat and greystone openings the honest answer is usually made to size.
• Wood and clad priced on the same scope. One change at a time, or you are comparing a material change and a specification change bundled together.
• A per-opening number, held against the only attributable Chicago figure this site has, the vinyl band of $650 to $1,200 per window installed (Modernize Illinois, March 18, 2026, read 2026-08-11). Wood and clad above that band is expected. How far above, and for what, is the conversation.

The recommendation. On a designated or proposed Chicago Landmark, or in a landmark district, price repair of the existing sash first and treat total replacement as the fallback the Guidelines say it is: the standard names material, glass size, muntin arrangements and profiles, and a repaired original matches all four by definition. If it is not landmark and the elevation matters to you, clad wood is the sensible middle, the interior wood you wanted with an exterior you are not maintaining. If it is not landmark and the elevation does not matter to you, the case for wood is an appearance case, which is a fine reason to spend money as long as it is named as one rather than dressed as performance. Compare it against vinyl on the same written scope before you decide.

What we could not confirm, and will not guess

• Any Chicago price for wood or clad wood, and any price separating aluminum-clad from vinyl-clad or fiberglass-clad. The single clad figure we found groups all three.
• How long a wood or clad window lasts, and how often it needs refinishing. No attributable figure for either, so no lifespan and no schedule. The written warranty is the checkable substitute.
• Any freeze-thaw ranking of frame materials. Nothing attributable was read.
• Whether a specific product satisfies the landmark standard. No adopted Commission windows policy exists and no allow list is published.
• Whether changing frame material breaks the in-kind permit exemption. The city defines in-kind as new elements "of the same type, size, and shape" and never says whether material is part of "type". Ask the Department of Buildings before you order.
• A Chicago labour rate. The national crew figure we read is $40 to $60 per worker per hour, about $100 an hour for a two-worker crew (Today's Homeowner, Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025, read 2026-08-11).
• How many greystones Chicago has. The figure that circulates traced only to crowd-edited and commercial pages.

Sources

All read 2026-08-11. Rules and quoted text: Commission on Chicago Landmarks, Guidelines for Alterations to Historic Buildings and New Construction, adopted March 4, 1992, for the WINDOWS section and the CLAPBOARDS siding sentence; work not requiring a building permit; Express Permit Program terms for exterior window and door replacement; and the ordinance adopting the 2022 Chicago Energy Transformation Code, Table R402.1.2. Housing stock: National Park Service, Chicago Bungalows Multiple Property Documentation Form, and the Portage Park Bungalow Historic District nomination, NRHP reference 14000620; City of Chicago, East Village District landmark designation report; the Historic Chicago Bungalow Association's design guidelines dated 6/21/2012 and its windows page; Chicago Architecture Center. Cost figures are market observations named with authors and dates: Modernize, "Clad Wood Windows", Rob Sabo, reviewed by Catie Bonner, August 29, 2025; This Old House, "How Much Do Wood Replacement Windows Cost?", Stephanie Minasian-Koncewicz, April 13, 2026, citing RSMeans data from Gordian and a 2024 survey of 2,500 homeowners; This Old House window replacement cost guide, same author, June 23, 2026, from a November 2025 survey of 1,000 homeowners; Today's Homeowner, Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025; Modernize national window replacement cost, Catie Bonner, reviewed by Isabella Andersen, March 17, 2026; Bob Vila, Katie Flannery and Evelyn Auer, June 10, 2024; Pella, May 14, 2026, a manufacturer; and Modernize, "Window Replacement Cost and Pricing in Illinois (2026)", Isabella Andersen, reviewed by Catie Bonner, March 18, 2026. How we source is on our methodology page. No competitor page, contractor marketing page, forum or search summary informed anything above.

The rest of this pillar is indexed on the materials hub, and the opening most of this stock is full of is covered on double-hung windows. If you want real quotes to hold against the numbers above, 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 on the about page.

Straight answers

Questions Chicago homeowners ask

Do I have to use wood windows in a Chicago landmark district?

There is no published list of allowed materials, and the Commission on Chicago Landmarks has no adopted policy on windows at all. What governs is the Guidelines for Alterations to Historic Buildings and New Construction, adopted March 4, 1992, which say that if total replacement is unavoidable "the replacement windows must match the historic windows in design and operation, material, glass size, muntin arrangements, profiles, and trim such as brick mold and sill". Material is one of the seven things named. Where the historic window was wood, a specification that matches on material is a wood specification, and that is why wood and clad wood keep ending up as the answer in a district even though no rule names them. Whether a specific product satisfies the standard is decided by Commission staff on your submittal, which is why the city invites a pre-permit conversation before you file. Read at chicago.gov 2026-08-11.

What does a wood window cost in Chicago?

We do not know, and we are not going to invent it. No Chicago-specific price for wood or for clad wood exists in any source we read, so this page publishes none. What we can give you is national, labelled national. Today's Homeowner puts wood at $600 to $1,500 per window (Elisabeth Beauchamp, reviewed by Amy DeYoung, September 3, 2025). Modernize puts it at $800 to $1,500 or more (Catie Bonner, reviewed by Isabella Andersen, March 17, 2026). Clad wood appears exactly once anywhere we read, at $950 to $1,800 per window, and that figure groups aluminum-clad, vinyl-clad and fiberglass-clad together (Modernize, "Clad Wood Windows", Rob Sabo, reviewed by Catie Bonner, August 29, 2025). All read 2026-08-11. Hold those against the one attributable Chicago figure, standard vinyl at $650 to $1,200 per window installed (Modernize Illinois, March 18, 2026), and treat the gap as a national gap rather than a measured Chicago one.

What is the difference between aluminum-clad, vinyl-clad and fiberglass-clad wood?

All three are the same idea: a wood window with a factory-applied exterior skin, so the wood stays on the inside where you see it and the weather hits something else. What changes is the skin. Aluminum is the thinnest and strongest section, so it holds the narrowest sightline, and it takes a factory finish. Vinyl carries its colour through the material. Fiberglass takes paint. The honest limit on this page is the price: the single clad figure we found, $950 to $1,800 per window, does not separate the three at all (Modernize, "Clad Wood Windows", Rob Sabo, reviewed by Catie Bonner, August 29, 2025, read 2026-08-11). So nobody we read can tell you what aluminum cladding costs against vinyl cladding, and a salesperson who quotes you that difference is quoting their own price list, which is legitimate and is not a market figure.

How much maintenance does a wood window actually need in Chicago?

No source we read publishes a repaint cycle, a maintenance interval or a service life for wood windows, so this page publishes no schedule. Stated as general material behaviour rather than as a Chicago measurement: exterior wood depends on a maintained finish, water sits at the bottom of the sash and on the sill rather than running off the face, and a finish that fails at those two places is where rot starts. Cladding moves that exposure off the wood on the outside and changes nothing on the inside. The practical version is that the exterior finish on bare wood is a recurring job you either do or hire, the sill and the bottom rail are where to look first, and a clad unit trades that job for a skin you cannot refinish the way you can repaint wood. Ask the supplier for the written finish warranty and what voids it, because that is the only part of this anyone will put their name to.

Can I repair the wood windows I already have instead of replacing them?

Often yes, and Chicago's own adopted guidance argues for trying. The 1992 Guidelines say: "The first and best answer to the question of how to treat windows is not to replace them but rather to retain and repair the existing sash and frames. Where this is not possible, replacing only deteriorated parts an new sill or a sash for instance is preferable to total replacement." (Quoted exactly as the city prints it, including the missing words in the second sentence.) The city goes further on the energy argument, writing that "properly weather-stripped, single-glazed sash can greatly reduce or eliminate air infiltration between sash and frame where most energy is lost" and that "The cost of weather stripping is nominal compared to the price of replacement windows, yet the effect can be considerable." Repairing damage to an existing window and replacing glass in an existing sash both sit on the city's list of work needing no building permit, in any building at any height. Read at chicago.gov 2026-08-11.

Does a wood window meet Chicago's energy code?

It can, and so can every other material, because the code names no material anywhere. For a residential building up to four stories above grade the city caps a replacement window at a 0.30 U-factor and a 0.40 solar heat gain coefficient, read in Table R402.1.2 of SO2022-2008, the ordinance adopting the 2022 Chicago Energy Transformation Code, on chicago.gov, 2026-08-11. That table is titled "MAXIMUM ASSEMBLY U-FACTORS AND FENESTRATION REQUIREMENTS", so the number is written against the whole window, frame and glass together. A wood unit rated at 0.30 satisfies Chicago exactly as a vinyl unit rated at 0.30 does. Ask for the rated U-factor and SHGC of the exact unit on the quote, in writing. One caution specific to this page: a landmark specification that matches historic single glazing and the code requirement can pull in opposite directions, and only Commission staff can settle that for your address.

Will a clad wood replacement shrink my glass area?

It can, and Chicago has a rule about it that most material comparisons never mention. Frame and sash sections differ in thickness between products, so a replacement fitted inside an existing opening can end up with less glass than the window it replaced. Under the Express Permit Program terms for exterior window and door replacement, a window installed under that permit "must have an equal or greater area of transparent or translucent glazing as the window or skylight it replaces", and in a residential building it "may not have less openable area than the widows it replaces" (the misspelling is the city's own). Read at chicago.gov 2026-08-11. Those terms bind work done under that permit rather than every job in the city, and they are still the right question to put on a quote: what is the glass area before and after, per opening, in writing.