Double-pane (or double-glazed) windows cost an average of $300–$5,500. This window type improves your home’s insulation, internal temperatures, and energy efficiency. According to Energy Star, you could achieve up to 12% in energy savings per year by upgrading to double-pane windows.
This guide details the average double-pane windows cost, different price factors, and tips on choosing the best replacement window options for your home.
What Are Double-Pane Windows?
Double-pane windows, also known as dual-pane or double-glazed, incorporate two glass panes in their design. The panes contain a space filled with gas, typically krypton or argon, that forms a thermal barrier to help reduce heat transfer. A spacer is added to maintain a uniform gap between the panes and provide an airtight window seal. This added insulation makes them more energy efficient than single-pane windows.
Double-pane windows are the most common type used in homes today. These windows offer long-term durability with an average life span of up to 20 years, according to the International Association of Certified Home Inspectors (InterNACHI). Although triple-pane windows offer the best insulation with three window panes, they are more expensive. Upgrading to double-pane windows provides the right balance between energy efficiency and affordable multi-pane design.
Average Double-Pane Windows Cost
The cost of double-pane windows ranges from $300–$5,500, but final window prices vary based on several factors. These factors include frame type, window size, and desired style. Here’s an overview of each.
- Material: Different materials require different maintenance and insulation levels, both of which affect price.
- Size: The larger the window, the greater the cost.
- Style: The style of replacement window you choose only makes a big impact on cost if you’re changing the window size. Replacing your windows with the existing size is cheaper than adjusting your home’s framing.
We’ve detailed how these factors affect cost below.
Cost by Window Frame Material
Dual-pane windows come in various materials, each with pros and cons. Here are price ranges for the most popular materials.
| Material | Average Cost (Installed) |
|---|---|
| Aluminum | $350–$1,450 |
| Fiberglass | $450–$2,500 |
| Steel | $650–$5,500 |
| Vinyl | $300–$1,450 |
| Wood | $450–$3,500 |
Aluminum
Aluminum double-pane windows are durable but generally not well-insulated. Some aluminum-framed windows have added insulation that increases efficiency.
Fiberglass
Widely considered one of the best materials, fiberglass-framed windows are well-insulated and require little maintenance. A fiberglass frame can even be manufactured to mimic wood.
Steel
Steel-framed windows are another durable, low-maintenance material but with little insulation. Some have an added insulating core, but these windows are more expensive.
Vinyl
Vinyl windows are budget-friendly and require minimal maintenance. However, they’re not very durable, so you may need to replace them again sooner.
Wood
Wooden windows are an attractive choice for durability and insulation. However, they require routine maintenance, such as scraping and painting, that adds to your overall expenses.
Cost by Size
Double-pane windows come in a variety of shapes and sizes. Generally, homes have a mixture of window sizes. Basement windows, transoms, or single-hung kitchen or bathroom windows are considered small. Medium-sized windows are the most common; standard single and double-hung windows fall into this category. Bay and picture windows, sliding windows, and other custom decorative options are considered large.
The table below outlines double-pane window costs by size, including installation.
| Size | Average Cost (Installed) |
|---|---|
| Small | $300–$750 |
| Medium | $400–$1,850 |
| Large | $650–$4,500 |
Cost by Window Style
Replacing a window with the same style is common but not required. You can upgrade to a new style but you’ll spend more to fit the window replacement properly if the new style’s sizing is different. Here are the average costs for the most common double-pane window styles.
| Style | Average Cost (Installed) |
|---|---|
| Bay | $780–$2,920 |
| Casement | $300–$850 |
| Double-hung | $400–$3,250 |
| Picture | $400–$950 |
| Single-hung | $300–$2,750 |
| Sliding | $400–$2,500 |
Bay
Bay windows are 3D-shaped and project outward from your home. They typically serve as a decorative window for the front of the house and can include a box seat or ledge for additional indoor seating. Most bay windows don’t open and include other window types in their design.
Casement
Casement windows open outward and close inward via a crank, similar to a door. They range in cost depending on size and material but are generally a less expensive option.
Double-hung
Double-hung windows have two sashes, or the part of the window that opens, allowing them to open from the bottom and top. Double-hung windows are often medium-sized and used throughout the house.
Picture
Picture windows are purely decorative. They’re large and provide sweeping outdoor views, plus lots of natural light.
Single-hung
Single-hung windows are another typical medium-sized window. Unlike double-hung windows, single-hung windows only open and close from one sash at the bottom.
Sliding
Sliding windows come in a range of sizes. They open by sliding from left to right on a track. Small sliding windows are often installed in basements, while medium- and large-sized windows can be installed throughout the rest of the house.
Free quote: Get your quote on double-pane window installation today
Factors Affecting Double-Pane Window Cost
Material, size, and style are the most influential cost factors for double-pane windows, but there are a few other things to consider, outlined below.
- Add-ons: Additional window features, such as an insect screen, low-emissivity (low-e) coating, tint, or coloring, increase the cost.
- Glass design: Double-pane glass comes in several designs. Though glazed is the most common and the least expensive, for an additional price you can choose from textured to mirrored.
- Glass type: Laminated glass is most common, but you can opt for tempered or argon gas-filled glass for an additional cost.
- Hardware: Window hardware isn’t always included in the price. Consider this expense when estimating the cost, especially if specialty hardware is required.
Energy Efficiency Upgrades
Replacing your windows with double-pane windows or choosing Energy Star-certified products can increase your potential energy savings. In fact, Energy Star states that upgrading from single-pane to Energy Star double-pane windows helps you save an average of $101–$583 annually.
Energy-efficient windows can also help keep your home’s temperature consistent, increasing its efficiency and comfort while lowering carbon emissions.
Number of Windows Installed
It’s more expensive to replace just a few windows than many at the same time. The labor for replacing one window costs an average of $150–$250 per window. Replacing 20 or more windows costs $80–$180 per window. So, if it’s within your budget, replacing many windows simultaneously is an excellent way to reduce your overall project cost.
Retrofit Replacement vs. New Construction Window
A retrofit replacement window involves less labor than a new construction window. A new construction window requires the installer to build framing and trim, essentially building out the window from scratch. It can involve modifying the structure of your home’s interior and exterior.
Retrofitting a replacement window means removing the old window and replacing it with a new one of the same size and style. It doesn’t usually require modifications. If any modification is required, it’s usually minimal to ensure a proper fit within the existing framing.
Window Brands
Most top-rated window companies manufacture and install double-pane windows. Some companies specialize in specific dual-pane window types, while others offer various options. Some companies will even create custom double-pane windows for your specific needs.
For homeowners seeking a full-service window replacement company, we recommend Renewal by Andersen. The company sells and installs its own high-quality composite windows in various styles and includes double-pane window options.
If you’re interested in up-front financing terms and exclusive product discounts, you should consider Champion Windows. Offering a catalog of custom products, such as windows, sunrooms, and siding, the company provides special promotional offers to help make your home improvement project more affordable.
Benefits of Double-Paned Windows
Though single-pane windows are less expensive, dual-pane windows offer cost-saving benefits that last well into the future. You’ll also boost your home value due to the improved energy efficiency and comfort levels. We’ll highlight some benefits of dual-pane windows below.
Add Value to Your Home
Replacing your home’s windows with new ones increases property value and appeals to potential buyers. Replacing your windows with double-pane windows can add to this selling point because many buyers are interested in environmentally friendly homes. Double-pane windows reduce the heat escaping from your home, thus preserving energy.
Increase Energy Efficiency
Double-pane windows are a great way to maximize energy efficiency. Whether you live in a warm or cold climate, double-pane windows insulate your home and maximize your energy usage.
Maintain Your Home’s Temperature
Because of their insulating properties, double-pane windows help to keep your home at a consistent temperature. They’re sometimes filled with argon or krypton gas, increasing insulation, reducing draftiness, and adding to your overall comfort.
Reduce External Noise
Double-pane windows offer better noise insulation than single-pane options. The multi-pane design and added insulation help absorb the soundwaves of noise pollution. As a result, you’ll experience less outdoor noise and create a more comfortable indoor environment.
Save on Electricity Costs
Double-pane windows help you save on electricity by preserving energy and heat, making them a wise long-term investment.
DIY vs. Professional
Installing windows on your own is possible, but there are some things to consider before you decide if you want to do the job yourself or hire a pro.
Professional Window Installation
Professional window installers are trained and can ensure the job is done properly. Any reputable installer should also have insurance coverage, meaning you won’t have to pay if anything unexpected happens during installation. Depending on your project’s scale, professional window installers can complete the job in a day or two.
DIY Window Installation
It’s possible to complete a window replacement project on your own if you’re generally handy and have experience with home improvement projects of a similar scale. However, installing windows can take a lot of time and leave your home as a construction zone for longer than desired if you aren’t entirely sure what you’re doing.
You’ll also need an array of tools to complete the installation. While most tools are standard, you’ll want to ensure they are all on hand before getting started. Here’s what you’ll need:
- Caulk gun
- Cordless drill/driver
- Flat pry bar
- Hammer
- Paint scraper
- Putty knife
- Spade bit (three-eights inch)
- Tape measure
- Utility knife
If you need to replace more than a few windows, it may be best to hire a pro.
Free quote: Get your quote on professional window installation today
Signs That You Need To Replace Your Windows
Here are some telltale signs that you should replace your windows.
- Condensation buildup: Condensation on your windows could allow moisture into your home, leading to many problems, including mold and mildew. Condensation buildup signifies damage to your window’s seals. Sometimes, seals can be replaced, but total window replacement is often recommended.
- Drafts or cold glass: Your windows may not be insulating properly if the glass is cold or you feel a draft. Insulation issues are usually remediated by replacement.
- High electricity bills: Higher electricity bills are another sign of an issue with your windows. If your heating and cooling system works overtime to maintain temperature, it’s likely due to a problem with your windows.
- Worsening functionality: If your windows don’t open or close as easily as they once did, it may be a sign of loose hardware that’s easily fixed, or it could mean that a pane or other component is broken. See a breakdown of window components below, as illustrated in our How to Replace a Window article.
How To Save on Double-Pane Windows
Replacing your windows can be expensive, but there are a few ways to reduce window replacement costs. These are our recommendations.
- Choose a material based on your needs: Choosing suitable materials for your windows can save you a lot in the long run. Wood windows are an excellent choice for insulation and durability, but they require maintenance. Choose a less fussy material if you think you may have trouble keeping up with the maintenance schedule or don’t want to pay for maintenance materials.
- Opt for retrofit replacement: You may be tempted to upgrade to a new window style, but a retrofit is the way to go if you’re on a budget. You’ll save money if you don’t have to alter your home’s structure.
- Replace multiple windows at once: Replacing most—or all—of your windows at once can save you a lot of money if it’s within your budget. Labor costs per window decrease if you’re installing multiple windows.
Our Conclusion
Although double-pane windows cost more than single-pane options, they offer better long-term savings and boost home value. Your final costs depend on your selected style, material choice, and additional energy efficiency upgrades. You can lower project costs by using affordable, durable materials and keeping your existing window styles. If you decide on a large window replacement project, work with a professional installer for the best results.
We recommend requesting free quotes from at least three contractors before deciding.
FAQ About Double-Pane Windows
Our Rating Methodology
The This Old House Reviews Team backs up our window ratings and recommendations with a detailed rating methodology to objectively score each provider. We conduct research by speaking with company representatives, browsing product selections, analyzing window line specifications, and conducting focus groups and consumer surveys. We then score each provider against our review standards for window variety, value, trustworthiness and transparency, window features, and customer service to arrive at a final score on a 5-point rating scale.
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