Cost to Install Windows: How Much to Budget in 2025 ?

Windows act as the link between your home’s interior and the outside world, letting in fresh air and natural light. They also provide a certain level of insulation, creating a cozy and pleasant indoor environment.

Windows are one of the most important elements of a home. Over time, they may need to be renovated or replaced to meet modern needs. So, how much does it actually cost to install a window?

Replacing windows is no small project—it involves working with glass, a delicate material. That’s why, if you’re planning to replace the windows in your home, it’s important to do your homework to understand what’s involved in this kind of job.

Replacing Your Windows: What budget should you plan for in Quebec?

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What is the cost based on the installation type?

Full-frame Installation

Full-frame installation is usually recommended when your existing windows need to be completely removed and replaced. This involves taking out the entire window, including the frame and all anchor components. This type of installation is necessary when there’s rot in the wood or moisture buildup that has damaged the surrounding area. These problems can only be properly addressed if the full frame is removed. This method is more expensive, with average prices ranging from $500 to $1,500 per window.

Retrofit Installation

A retrofit installation involves fitting a new window into an existing frame. With this type of work, most of the original frame components stay in place. Depending on the style of the existing window, aluminum capping might be needed to cover the exposed frame. This is a more affordable option compared to a full-frame replacement, with prices ranging from $300 to $850 per window (glass only).

Storm Windows

Storm windows are secondary windows installed on the inside or outside of an existing window, primarily to improve thermal and sound insulation. They’re often used in older homes where replacing the original windows isn’t feasible or desirable. In addition to their energy efficiency, storm windows can provide extra protection against the elements while preserving a home’s architectural character. This is generally a more economical option, with installation costs ranging from $120 to $250 per window (glass only).

In some cases, contractors may offer discounts or reduced rates per window if multiple windows are installed at once. Be sure to do your research and consult experts when you’re ready to move forward with your project!

What Is the Cost for Different Types of Windows?

There are several types of windows available on the market, each with its own unique features and benefits. The double-hung window is a timeless classic known for its practicality and efficiency. It opens from both the top and bottom, allowing warm air to escape through the top while cooler air enters from below. This dual-opening feature also makes cleaning easier, as both sashes tilt inward. However, when both sections are open, the reduced opening space can slightly limit airflow. This type of window typically costs between $400 and $1,100, while the single-hung window costs between $200 and $900. 

Casement windows, on the other hand, open outward using a crank mechanism with side hinges. This design offers excellent ventilation and a tight seal for better insulation. Although they only open up to about 5 inches, which may be a drawback in terms of aesthetics, they remain a popular choice for energy efficiency. Casement windows generally range from $350 to $1,200.

What Factors Influence the Average Price of Window Replacement in a Home?

Source : Service Vitrerie ComExpress & Filles inc.

Several elements can affect the cost of installing new windows, including:

Type of Window

The window model you choose has a significant impact on cost. For instance, casement and awning windows typically cost more than sliding or double-hung models due to their more complex opening mechanisms and superior sealing.

Window Size

Larger windows naturally cost more. Custom-made or oversized windows require more materials and more complex installation, increasing the overall price.

Materials Used

The frame material (PVC, wood, aluminum, or hybrid) also directly affects cost. PVC is often the most affordable, while aluminum and hybrid frames offer greater durability and performance at a higher price point.

Installation Accessibility

Where the windows are located in the house can also influence the price. Windows installed on upper floors or hard-to-access areas may require scaffolding or special equipment, leading to additional charges.

Installer or Supplier

Pricing can vary depending on the experience, reputation, and warranty provided by the installer. It’s always wise to request multiple quotes to find the best value without compromising on quality.

Glazing

Double Glazing

Double-glazed windows are very common and widely available in various shapes and frames. While not the cheapest option, they offer solid performance. They feature a sealed gap filled with inert gas, which improves thermal efficiency and sound insulation. Compared to single-pane glass, double glazing helps block more outdoor noise and contributes to better temperature control. Though more expensive upfront, these windows can help reduce long-term energy costs.

High-Performance Glass

High-performance glass is the most expensive option on this list. Various types of specialized glass are available, including:

• Triple glazing

• Soundproof windows

• Impact-resistant glass

• Tinted glass to reduce thermal conduction

Depending on your individual needs and living environment, one of these advanced options may be worth considering.

Additional Factors to Keep in Mind

Professional vs. DIY Window Installation

When it comes to window installation, homeowners often weigh the choice between hiring a professional and taking on the project themselves. While the DIY route can appear to save on labour costs, it comes with notable risks and considerations.

Professional installers bring experience, specialized tools, and knowledge of local building codes to the job. They can identify potential issues—such as hidden structural damage or the presence of hazardous materials like lead paint—that might go unnoticed by an amateur. Most manufacturers also require professional installation to maintain warranty coverage, meaning a DIY job could void your window warranty if problems arise later.

On the other hand, DIY installation may appeal to those with advanced renovation skills and a desire to cut costs. However, improper installation can lead to air leaks, water infiltration, and even structural damage—issues that often result in higher repair costs down the line. Additionally, poorly installed windows may reduce energy efficiency and home comfort.

In most cases, unless you have substantial experience with window installation, hiring a qualified professional is the safer and more cost-effective choice. Not only does it ensure the job is done right the first time, but it also provides peace of mind through warranty protection and expert workmanship.

Tips to Save on Window Installation

Window installation can be a significant investment, but there are several practical ways to keep your costs down without compromising quality or comfort. Here are some proven strategies to help you save on your window installation project:

• Many contractors offer discounts during slower periods, such as fall or winter. Scheduling your installation during these times can result in lower labour rates and faster project turnaround.

• Vinyl windows and standard double-pane glass are typically more affordable than wood or fiberglass options. Sticking to common window sizes and styles can also help you avoid expensive custom orders.

• Replacing several windows in a single project often qualifies you for bulk pricing or volume discounts from installers. This approach reduces the per-window cost and minimizes disruption to your home.

• While features like triple glazing, custom shapes, or built-in blinds are appealing, they can quickly increase your overall costs. Focus on essential features that meet your needs and skip unnecessary add-ons to stay within budget.

• Always get estimates from at least three reputable contractors. Comparing quotes allows you to find the best value and may give you leverage to negotiate a better deal.

• If your existing window frames are in good condition, opting for a retrofit installation—where new windows are fitted into the existing frames—can be more affordable than a full-frame replacement.

By following these tips, you can make informed decisions and achieve a quality window installation while keeping costs manageable.

Our Tips for Making an Informed Decision

Replacing or installing new windows is a major investment that can enhance the comfort, energy efficiency, and curb appeal of your home. Before you start, take time to assess your needs, budget, and home’s specific characteristics. Compare installation types, available materials, and window models to find the right solution for your situation. Don’t hesitate to request multiple quotes from certified professionals to get the best quality at a fair price. With the right information, you’ll be ready to make a smart, lasting choice.

To find out about the average prices of different home renovation projects, check out our Home renovation price guide.

FAQ

Is it worth replacing 20 year old windows with new ones?

Yes, it absolutely is! Windows that are 20 years old have likely reached the end of their typical lifespan, and advancements in energy-efficient technology mean that newer windows can offer significant improvements. Replacing them with more energy-efficient options could lead to immediate savings on your energy bills, as modern windows are designed to better insulate your home and reduce heat loss.

Are there discounts for replacing multiple windows at once?

Yes, many contractors offer bulk pricing or volume discounts if you replace several windows during the same project. This can lower the per-window cost, as installers save on mobilization and labour by completing the work all at once. It’s a good idea to ask prospective installers about any available discounts or promotions for larger projects.

What is a window sash?

A window sash is the part of the window that holds the glass panes and moves to open or close the window. For example, in double-hung windows, both the top and bottom sashes can slide up or down. Replacing old or worn sashes with new, energy-efficient ones can improve your home’s comfort and reduce heating and cooling costs.

Is it worth replacing old single-pane windows?

Absolutely. Single-pane windows are much less efficient than modern double- or triple-pane options. Upgrading to new windows with better insulation can improve comfort, reduce drafts, and lower your energy bills by 10–15% or more, depending on your home and climate.

Will replacing my windows increase my home’s value?

Yes, installing new windows can boost your home’s resale value. Not only do modern windows improve curb appeal, but they also offer better energy efficiency, which is attractive to potential buyers. Studies show that homeowners can recoup a significant portion of their investment in new windows when selling their property.

Can I save money by installing windows myself?

While DIY installation can eliminate labour costs, it’s important to be cautious. Improper installation can lead to air and water leaks, void warranties, and cause costly repairs down the line. Most manufacturers require professional installation for warranty coverage. Unless you have advanced renovation experience, hiring a qualified installer is usually the safer and more cost-effective choice.

Is it cheaper to replace all windows at once?

Replacing all your windows in a single project often results in a lower per-window cost due to volume discounts and reduced labour mobilization. However, the total upfront investment will be higher. If budget is a concern, ask installers about phased replacement options.