How Much Do Double-Pane Windows Cost?

Typical Range:

$150 - $6,900

Find out how much your project will cost.

Cost data is based on research by HomeAdvisor.

Updated October 24, 2022

Written by HomeAdvisor.

Double-pane windows cost between $150 and $6,500 per unit to replace, with an average cost of $1,200. Most people pay between $300 and $2,100 per window.

The price difference is due to the glass type, frame type, hidden problems that arise during installation, and the size of the windows. The cost of replacing the window glass is less than that of replacing the whole window, including the frame.

Average Cost to Install Double-Pane Windows

Average CostHigh CostLow Cost

What Are Double-Pane Windows?

As the name suggests, double-pane windows contain two sheets of glass separated by a spacer. Inside the gap caused by the spacer is trapped inert gas, which creates an energy-efficient barrier or a thermal break, regulating the internal temperature of your home and minimizing heat or cooling loss.

Double-Pane Window Installation Cost Breakdown

How much are double-pane windows? While materials make up the bulk of the cost to replace windows, you shouldn’t overlook the price of labor. Additionally, unless you have a guaranteed price quote from your contractor, you'll need to leave some wiggle room in your budget for unexpected problems that could crop up during installation.


For a small storm window, the materials may cost as little as $50. But you can pay as much as $6,500 for a full bow window with many small panes. The prices of materials for custom and highly ornate windows can reach over $10,000


The labor cost generally ranges from $100 to $300 per window, equating to about $40 per hour. Note that complex or substantial installations, like replacing a bow window, may accrue significantly higher labor costs, but your window installer should include that information in their quote. 

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Double-Pane Window Installation Costs by Size

One of the key factors in determining the cost of your double-pane windows is the size. You determine the pane size by multiplying the width by the height. You may also be asked what pane thickness you want, ranging from 1/8 inch to 1 inch. 

If you only want to replace the glass, then you need to choose the same glass thickness as your current glass because if you change the glass thickness, you'll have to change the frames to accommodate the difference and maintain efficiency. 

The double-pane window prices below are based on the standard window thickness of 1/2 inch per pane and the costs of double-glazed windows.

Window Size in In. Average Cost Range Including Labor Average Cost Including Labor
24 x 36 $230 – $480 $360
30 x 36 $260 – $570 $420
24 x 54 $300 – $590 $450
36 x 42 $420 – $720 $570
28 x 58 $430 – $740 $590
46 x 46 $480 – $820 $650
46 x 54 $750 – $1,100 $930

Double-Pane Window Replacement Cost by Window Type

The type of window you're replacing makes a huge difference to the price you can expect to pay. Storm window installation costs start at $150 for materials and labor, but a bow, ornate, or oversized window can cost as much as $6,900.

Window Type Average Cost Range Including Labor Average Cost Including Labor
Storm $150 – $600 $380
Fixed and picture $170 – $1,000 $590
Single-hung $200 – $700 $450
Double-hung $250 – $1,050 $650
Sliding $250 – $1,100 $680
Casement $250 – $2,000 $1,130
Folding $600 – $1,100 $850
Bay $700 – $4,800 $2,750
Bow $1,600 – $6,800 $4,200
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Double-Pane Window Replacement by Glass and Fill Type

Dual-pane windows are generally filled with either argon or krypton gas because they're inert and provide an efficient thermal protection barrier. You can also choose to have high-efficiency and safety coatings applied. These choices all impact the cost to replace double-pane windows.

Glass and Fill Type Average Cost Range Including Labor Average Cost Including Labor
Tempered $280 – $1,000 $640
Laminated $380 – $930 $660
Frosted $450 – $1,100 $780
Low-E coating $450 – $1,140 $800
Argon gas $480 – $1,150 $820
Krypton gas $630 – $1,490 $1,060

Double-Pane Window Cost by Frame Material

How much does a double-pane window cost? If you're planning to replace the whole window and not just the glass, the frame material you choose is a significant cost factor. Aluminum is the most affordable option, while composite and fiberglass frames are the most costly. The frame choice impacts longevity, durability, efficiency, and ongoing maintenance needs.

It's important to note that some locations are legally required to have vinyl impact windows or at least hurricane windows. Vinyl impact windows and hurricane windows cost more than standard double-pane windows because they use more robust materials and provide better protection against storms. Other states have minimum energy-efficiency requirements. Therefore, you must check with your local building code office and contractor before you start replacing windows. 

Take a look at the cost of double-pane windows by the frame type: 

Material Type Average Cost Range Including Labor Average Cost Including Labor
Aluminum $180 – $700 $440
Vinyl $200 – $1,200 $700
Wood $250 – $1,600 $930
Composite $400 – $1,500 $950
Fiberglass $600 – $1,800 $1,200
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Other Double-Pane Window Cost Factors

Various factors impact the cost of installing windows, ranging from which brand you choose to seasonality and whether you're able to keep the existing frame or need new ones. 


Because double-paned windows offer the best combination of value, price, and energy efficiency, they're widely available, with all the top brands making and installing them. You'll find some brands only offer vinyl frames, some that provide a range of materials, or others that specialize in wood- or metal-framed windows. If you have an older home or one with odd-shaped windows, you'll need to choose a company specializing in custom-fit windows.

Window Brand Average Cost Range (All-In) Average Cost (All-In)
Feldco $150 – $1,450 $800
Alside $150 – $1,750 $950
Pella $150 – $3,500 $1,830
Andersen $250 – $3,500 $1,880
Marvin $250 – $4,000 $2,130


Most localities require you to obtain permits before installing or replacing windows. If unsure, check with your local authority before starting work. Most contractors include the permitting fees in the price of the window installation quote. However, not all contractors take care of this for you, so be sure to double-check.


Window installers are busiest during the spring and fall. Because demand during these periods is higher, so too are the costs. However, if you can wait until the summer or winter, you may get a better deal. During the off-season, many companies offer discounts and special offers, so it's worth waiting and shopping around.

New vs. Existing Frame

If you've already got double-pane frames in good condition and just need the glass replaced, you'll save around 50%. However, the window panes have to be the same thickness, and the frame has to be in a good enough condition to reseal. If, for example, you're upgrading from single-pane windows to double-pane or switching to a different type or thickness of glass, you'll also need to replace the frame.

Extras and Upgrades

Many upgrades, extras, and additions can increase the price of your window replacement project but also create a higher-quality finish that meets your design needs. As well as necessary upgrades, you need to consider the nice-to-haves, like the cost of window treatments, and ongoing maintenance fees, like the cost of window cleaning

Take a look at the costs of some of the most common extras and upgrades:

  • Exterior window trim: $1–$10 per lin. ft.

  • Window treatment: $600–$1,000

  • Window screen: $70–$200 each

  • Window cleaning: $40–$75 per hour

  • Window tinting: $330–$570

  • Hurricane shutters: $2,300–$7,900

  • UV film coating: $5–$12 per sq. ft.

  • Creating a window wall: $700–$1,600 per lin. ft.

  • Installing a new window in an existing wall: $1,000–$5,000 per window

DIY vs. Hiring a Pro

Installing windows is a job for the pros. Instead of trying to save money on the installation, call a local window installer to get the job done right. Aside from the fact that replacing windows—even if you keep the frames—is difficult and requires a high degree of skill, the savings are likely to be minimal, if any. Retail-priced windows and the expensive tools and equipment needed to install double-pane windows offset your labor savings. 

Using a pro to install your windows means they have their own specialist equipment. Plus, they can access trade-only pricing for a much better price on the windows and frames. If you want to try and save money on the window installation, shop around or wait until the off-season (summer or winter) when you'll likely get access to better deals.

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Frequently Asked Questions

Can you repair the seals on double-glazed windows?

Yes, you can repair seals on double-glazed windows, but it's a delicate and time-consuming process. If the seal has blown, the glazier will need to remove one of the panes, thoroughly clean the area to remove all contaminants and debris that may have got in, replace the pane, refill the gap with argon or krypton, and install the seal. The cost of window repair may be more budget-friendly than window replacement.

How do you get rid of condensation in double-glazed windows?

You can get rid of minor condensation in between the panes of double-glazed windows by warming the window with a hair dryer. Keep the nozzle of the hair dryer at least 6 inches from the window and set it on moderate heat. This quickly removes condensation. But note that you should only try this if you're certain you don't have cracks or chips in the window.

Can I replace just one pane in a dual-pane window?

While it's technically possible, replacing one pane in a dual-pane window isn't recommended. This is because replacing just one pane still requires a significant amount of work and will likely result in inefficient windows that lack the necessary tight seal.

How do I know if the seal is broken on dual-paned windows?

You can tell that the seal is broken in a double-paned window because moisture gets between the panes and causes condensation or a permanent foggy, misty patch. You may also notice drafts and temperature fluctuations, and your HVAC system will likely have to work harder to correct the inefficiency of the windows. You may also find that your windows are harder to open and close.

How much more efficient are double-pane windows?

Double-pane windows are 24% more efficient in winter and 18% more efficient in summer than single-pane windows. Triple-pane windows cost significantly more than double-pane but are 20% more efficient. Please note that you'll only get the full energy-efficiency benefit if you replace all the windows in your home. Replacing one or two won't make a significant difference, as the old windows won't have the same thermal break as those with the inert gas between the panes.