How Much Does Casement Window Replacement Cost? [2026 Data]

In 2026, the national average cost to replace a casement window is $815. Most homeowners spend between $260 and $950 per window, with window size, frame material, and labor driving the spread. Budget toward the higher end if you're upgrading to energy-efficient or larger windows.

Casement Window Cost Factors: What Determines the Price?

Casement window replacement costs range from $260 to $950 per window, with frame material, window size, and number of panes as the primary cost drivers. Labor adds $100 to $300 per window, and any prep work, such as enlarging an existing opening, can push your total significantly higher.

Size

Casement window costs range from about $260 for a standard 24-by-36-inch window up to around $630 for a 36-by-60-inch window, with larger sizes costing more for both materials and installation. The table below breaks down average casement window replacement costs by size:

Material

When you prepare to buy any type of window, frame material is one of the biggest decisions you'll make, with casement window frame costs ranging from around $200 for standard vinyl to over $2,000 for customized wood. Here’s how your frame material affects the average cost of casement window replacement:

Number of Panes

Casement windows are available in single-, double-, or triple-pane configurations, with more panes offering better insulation and energy efficiency. Costs vary significantly by number of panes, as shown in the breakdown below:

Energy Efficiency

Energy-efficient casement windows cost $200 to $950 per window—more than standard options—but may qualify for tax credits to offset the cost. Pricing depends primarily on four key efficiency features:

• Double- or triple-pane glass

• Low-E or insulated glass

• Argon or krypton gas fills

• Fiberglass or insulated frame materials

Casement Window Type

Casement window costs depend on the type, with single casements at the low end and egress models at the top. Double (French), push-out, top-hinged, and cottage-style designs run $150 to $1,000 depending on size, configuration, and materials. Flanker casements and egress casements cost the most, and egress models are often required by code for sleeping areas and basements.

The table below compares average costs across seven casement window types:

Number of Windows

Replacing multiple casement windows at once is often more cost-effective than doing them one by one. Contractors can often lower their per-window labor rates, and suppliers may offer bulk discounts. If several of your windows need replacing, ask your contractor about bundling before starting the job.

Brand

The brand you choose has a direct impact on cost, with budget-friendly options starting lower and premium brands commanding significantly higher prices. Costs vary by brand, as the table below shows:

Labor

Professional installation adds about $100 to $300 per window. If an existing window needs to come out first, expect to pay about $60 more per window, which covers removal and proper disposal by the installer.

Prep

Prep work can increase your project budget when you're adding a window to a wall that has none or upsizing an existing opening for a larger casement window. Enlarging a window costs $800 to $5,000, while cutting a new opening in a wall costs an additional $1,000 to $5,000.

Ongoing Casement Window Costs: What to Budget For

Beyond the upfront replacement cost, casement windows come with ongoing expenses worth factoring into your budget, including permits if you're enlarging an opening and long-term maintenance costs for wood frames. Planning for these costs from the start helps you avoid surprises once installation is complete.

Repairs

Window repair costs range from $175 to $610, and casement windows, with their many moving parts, may need repairs more often than simpler window styles. Common repairs include hardware replacement at $75 to $200 and seal repairs at $200 to $600.

Maintenance

All casement windows need regular maintenance—primarily keeping tracks, seals, and glass clean. Window cleaning runs about $150 to $300 total, or $4 to $15 per window, at least twice a year. Wood casement windows require additional upkeep: budget about $50 to $110 in materials and tools to repaint or reseal the frames every five years to protect against moisture damage.

Permits

Building permits for windows cost about $50, though a permit may not be required if you're doing a straightforward like-for-like replacement. If your project involves creating a new opening or enlarging an existing one, you'll likely need to pull a permit before construction begins.

DIY vs. Hiring a Pro to Install Casement Windows

Homeowners with experience installing casement windows and all the necessary tools can save on installation costs. DIYing casement window installation costs about $200 to $2,000 for the window materials. Since improper window installation can result in damage to your home, water intrusion, increased energy costs, or even broken glass, hiring a window replacement specialist is your best bet unless you have extensive window installation experience.

A local window contractor will properly install your casement window, ensuring that there are no gaps, safety concerns, or damage. The extra $100 to $300 per window in installation costs can give you the peace of mind that your windows are correctly installed.

How Much Do Casement Window Add-Ons Cost?

When installing new casement windows, many homeowners add upgrades such as remote-controlled blinds or UV-blocking film to improve comfort and make their windows more energy-efficient. Common add-on costs for casement windows include the following options.

• Energy-efficient windows: $120–$1,200

• Window treatments: $150–$1,650

• Blinds or shades: $200–$1,350

• Window cleaning: $150–$300

• Window seat: $500–$8,000

5 Ways to Save Money on Casement Windows

Casement windows are a worthwhile investment in your home. They add a charming look, and they are easy to pop open for a breath of fresh air. However, if you're looking to cut down your budget, there are some ways to save money on casement window costs.

• Shop in winter: Look for off-season deals by shopping for windows in the winter. Wintertime installations may also score you a deal.

• Bundle with more windows: You can often save money when installing multiple windows at once over a one-off.

• Go standard: Choose standard colors and sizes whenever possible, as custom casement windows can cost into the thousands.

• DIY when you can: If you can remove the old window and dispose of it yourself, you could save a little cash.

• Keep up with maintenance: By keeping your windows in good condition, you can save on repairs in the long term.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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