The average per-window cost in 2026
If you have asked for three quotes lately, you already know how wide the spread is. In 2026, a standard double-hung replacement window in a typical-sized opening runs somewhere between $400 and $2,200 installed. Most homeowners landing on a mid-range vinyl or fiberglass package end up paying $650 to $1,100 per window once installation, disposal, and basic trim work are bundled in.
The cost varies based on three things: the frame material, the glass package, and how easy the opening is to work with. A clean second-floor swap on a 1990s house with vinyl siding is the cheap version of the job. A 1920s plaster home with rotted sills, lead-paint protocols, and odd-sized openings is the expensive one — and contractors price each window the same way insurance prices a car, with the modifiers stacking up fast.
Typical per-window installed cost for mid-range vinyl or fiberglass in 2026
Cost by frame material
Frame material is the single biggest lever on the final price. Glass packages add or subtract a few hundred dollars per window; frames change the entire job tier. Here is what each material runs installed in 2026.
Vinyl: $400–$1,000 per window. Still the volume leader. Modern vinyl is durable, low maintenance, and energy efficient. The downside is appearance and resale — high-end neighborhoods often want something better, and dark exterior colors can warp on cheap lines.
Fiberglass: $700–$1,500 per window. Stiffer than vinyl, paintable, and far more dimensionally stable in extreme temperatures. This is what most editorial reviewers point homeowners toward when budget allows.
Composite: $700–$1,400 per window. A mix of wood fiber and polymer. Performance sits between vinyl and fiberglass. Pricing depends heavily on the brand — some composites are sold at fiberglass prices, others at vinyl-plus.
Wood: $800–$2,000 per window, more if custom. Premium look, real maintenance burden. Historic districts often require wood, which is when prices climb hard.
Aluminum-clad wood: $900–$2,200 per window. Wood interior, aluminum exterior. Top of the line for many homeowners. The aluminum skin solves the maintenance problem but adds significant cost.
What is included in a typical quote (and what is not)
Most window quotes look the same on paper. They list a window count, a frame material, a glass package, an installation line, and a total. What is usually included: the window itself, basic interior stop trim, exterior capping in aluminum or vinyl coil stock, foam insulation around the frame, haul-away of the old window, and a one-year installation warranty.
What is usually not included — even though most homeowners assume it is — covers the expensive surprises. Interior trim replacement (especially stained or custom-milled trim) is almost always extra. Drywall repair around the opening is extra. Painting of any kind is extra. Repairing rotted sills or studs is extra. And in homes built before 1978, EPA-compliant lead-safe work practices are extra, often $50–$200 per window in added labor.
Read the line items, not the total. A $9,500 quote with everything included can beat an $8,200 quote that has half a dozen exclusions buried in the fine print.
Where contractors add markups
This is the part of the conversation most installers do not volunteer. Window companies make solid margins on the windows themselves, but the real markup hides in the add-ons.
The first is interior trim. A typical replacement window leaves a gap around the new frame. Re-trimming that opening to match existing stained wood casing can run $150–$400 per window. Painted MDF trim is cheaper, but it still gets billed at a markup of two to three times the actual lumber cost.
The second is drywall and plaster repair. If the installer has to cut into the wall — common on full-frame replacements — you will pay for patching and re-texturing. Quotes often list this as “TBD upon inspection,” which is contractor-speak for “we will tell you what it costs after we open the wall.”
The third is lead paint remediation in older homes. The federal rule requires EPA-certified renovators to follow specific containment protocols. Some contractors quietly skip the paperwork and pocket the savings. Others bill the full premium without showing you the certification. Ask for the firm’s EPA RRP certification number on any pre-1978 home.
Added labor per window for lead-safe work in pre-1978 homes
Energy efficiency: what features actually pay back
Window marketing leans heavily on energy savings, and the math is usually softer than the brochure suggests. The honest version: upgrading from old single-pane windows to modern ENERGY STAR double-pane saves most homeowners $125–$465 per year, according to Department of Energy estimates. Upgrading from already-decent double-pane to triple-pane saves much less — and the upcharge is steep.
The features that actually move the needle on a typical install: Low-E coating (almost universal now), argon gas fill (cheap, worth it), warm-edge spacers (small but real), and a tight installation that does not leak air around the frame. The features that are sold hard but rarely earn back their cost on a normal job: krypton gas, triple-pane glass outside cold climates, and most “premium” tinted or decorative coatings.
If your contractor quotes a $300–$500 per window upgrade for triple-pane and you live anywhere south of Pennsylvania, the payback math almost never works. Spend that money on better installation or better frames instead.
Standard size vs custom — the cost cliff
Window manufacturers build to standard sizes in roughly 2-inch increments. As long as your opening fits one of those sizes (with a small adjustment), you pay standard pricing. Once you cross into truly custom dimensions, prices jump hard — often 2x to 4x — and lead times stretch from two weeks to two or three months.
Bay and bow windows live in custom territory by default. A standard bay window installed runs $2,000–$5,500. Large picture windows over 4 feet wide can hit $1,500–$3,500 per unit. Architectural shapes like arched or octagonal windows are essentially priced individually by the manufacturer.
If you have unusual openings, get the custom-size pricing in writing before signing anything. Some quotes lump “all windows” into one number and let the custom premium hit during change orders, which is a much weaker negotiating position than catching it up front.
The bottom line
For a typical American home with 10 to 15 standard-size windows, plan on $5,000–$25,000 for a full replacement in 2026. Vinyl jobs cluster on the lower end of that range. Mid-range fiberglass projects average around $12,000. Aluminum-clad wood or premium wood pushes the upper end, especially in older homes that need trim restoration.
Get three quotes, line up the inclusions side by side, and ask each contractor what they would remove from the quote to hit a lower price — the answer tells you which line items are real and which are padding. Frame material drives the headline number, but inclusions, trim, and installation quality are what separate a $9,000 job from a $14,000 job on the same house.