How Much Do Glass Block Windows Cost to Install in 2025?

This article was updated using automation technology and thoroughly reviewed for accuracy by HomeAdvisor Editor Ryan Noonan.

Installing glass block windows costs an average of $743 per standard-sized window, with prices ranging from $477 and $1,014 depending on location, size, and quality of materials. Larger windows or glass block walls cost up to {MaxCost or more. Individual glass blocks range from $7 to $70. By choosing glass block windows, you'll not only add a stylish touch to your home but also enjoy benefits like improved privacy and energy efficiency. Hiring a professional installer ensures you'll get the most out of your investment, with quality workmanship and durable results.

Glass Block Window Cost Factors

Material

Glass blocks come in a variety of options, including clear, colored, and acrylic blocks in different styles. Although glass and acrylic block windows are similar in price, glass block windows usually have higher installation costs due to their weight and installation process.

Clear Glass Block

Clear glass block windows cost between $7 and $25 per block, with an average of $10. These blocks typically come in packs of four, five, six, eight, or 10, making them suitable for projects of any size. Keep in mind that end pieces usually cost a bit more, but they provide a seamless finish to your installation.

Colored Glass Block

Colored glass block windows, ranging from $20 to over $35 per block, depending on the color, allow you to add a vibrant and personalized touch to your space. Corner pieces, which create smooth transitions in your design, are sold individually and cost between $45 and $70 each.

Acrylic Block

Acrylic block windows, costing between $12 and $20 per block, offer a lightweight and versatile alternative to traditional glass blocks. Available in a variety of prefabricated shapes, these windows mimic the appearance of glass blocks but are made from injection-molded and heat-welded acrylic resin. Their lighter weight makes them ideal for operational windows, expanding your design possibilities.

Style

Glass blocks come in several styles based on their look. The styles often add privacy so the glass isn’t completely transparent, but you can style a glass block to create texture and visual appeal. The price for styled glass blocks tends to increase with more elaborate designs.

Clear

Basic clear glass blocks cost an average of $10 per block, though they can range as high as $25 per block. A clear glass block has no added design but remains the most commonly used type. They come in packs of 8-inch by 8-inch individual blocks, and packs can have as many as 10.

Wavy

Wavy glass blocks cost $7 to $25 per block and provide privacy without having a cloudy look like a frosted pattern. Wavy glass works well in bathrooms or basements, as well as spaces where you want to allow natural light to enter while maintaining privacy.

Alpha

Alpha glass blocks cost between $10 and $20 per block. Alpha glass blocks have a circle design within the block, a more modern look, and remain mostly transparent, though the curve of the circle can distort images. Some homeowners like alpha glass blocks because they can bring a look of sophistication to a space.

Ice

Ice-style glass blocks cost between $15 and $30 per block. They offer texture and privacy, making them popular for shower walls. Ice-style glass blocks also allow natural light to pass through while limiting visibility.

Diamond

Diamond glass blocks cost $15 and $70 each. They offer texture and a unique look and can refract light differently for additional appeal. Diamond-styled glass blocks drastically limit visibility from the outside and can cast interesting shadows.

Frosted

Frosted glass blocks cost $15 to $35 each. They provide the most privacy and can also limit direct sunlight in areas you want to protect items from fading in direct sunlight.

Leathered

Leathered glass blocks cost $10 to $20 per block, with an average cost of $15. They look similar to ice glass blocks but have more distinct lines. Leathered glass blocks have a softer finish than frosted glass and allow more light to pass through. However, leathered glass blocks can be difficult to find.

Size

Common glass block sizes include 29 by 29 inches, 23 1/4 by 46 1/2 inches, 31 1/2 by 15 1/2 inches, and 15 3/4 by 15 3/4 inches. Costs for glass and acrylic blocks vary based on their size and installation. Some common glass block sizes can start as low as $190 installed and rise as high as $780 for an acrylic block window.

Glass Block Installation Cost by Location

Whether you're considering stylish glass block windows, elegant walls, eye-catching bar fronts, or even pool and spa dividers, each option varies in price based on the materials and labor involved. For example, installing a small glass block window is more budget-friendly, while creating a stunning glass block shower wall or room partition is a larger investment. Understanding these cost differences can help you plan your project to fit your vision and your budget.

Windows

Glass block window installation costs range from $460 to $980 and average about $710. Prices will increase with the size of the window and the type of material used. Some homeowners will want an operational glass block window or glass block window with venting, which will add to the cost. New window installation costs between $3,450 and $11,850.

Walls

Glass block walls cos between $200 and $2,900 per linear foot, depending on the style of the glass block. Adding any colored glass block or styled glass will increase the cost, plus any type of design like a curve. A simple hallway or accent wall costs an average of $1,250.

Bar Fronts

Glass block bar fronts cost $1,000 for a basic design. A bigger or more elaborately designed glass block bar front costs between $2,000 and $3,000. It must support the weight of the bar countertop, which requires additional diligence during installation. Homeowners also like to accentuate their bar fronts with lights or colored glass blocks, both of which will raise costs.

Pool and Spa Dividers

A glass block pool and spa divider costs $1,000, installed. A glass block is one way to divide a spa from a pool while maintaining a clear look between the two areas. You can often use glass blocks to create a waterfall effect in a pool or separate an elevated spa and a pool.

Glass Block Installation Labor Cost Factors

Labor to install a glass block averages $45 per hour. The total labor expense depends on how big and complex your project is. For example, larger installations take a day or two and cost up to $4,500 in labor. If you're considering a prefabricated glass block, labor costs can range from $150 to $1,000.

Installation Method

You can either install a glass block as a prefabricated block or install each one individually. In either case, you’ll need to use mortar to secure the wall, window, or blocks in place. You’ll also need spacers and reinforcing rods as you construct the wall. For some projects, you can use silicone instead of mortar, but mortar typically provides better protection in areas like showers because it does a better job of preventing moisture from penetrating.

Ease of Installation

If you're replacing a glass block window and your existing frame is in good shape, that's great news—it can help keep costs down. However, if the frame is damaged or you're looking to expand the opening for a larger window, expect some additional expenses.

Similarly, integrating a glass block installation into a larger project, like a full bathroom remodel with a new shower, can increase costs but also offers a chance to create a cohesive and stunning design. Adding unique features like curves or custom shapes to your glass block wall will enhance the visual appeal but may also impact your budget. Knowing these factors upfront can help you plan your project with confidence.

New or Replacement

Window replacement costs $300 to $2,100 per window. Adding a new glass block window in a new opening ranges from $150 to $800. Installing a window in concrete walls tends to be more expensive than cutting a rough opening through wood framing.

Reusing your existing window frame can save you money if your current frame is in good condition. Window frame replacement costs $185 to $600. Being aware of these factors can help you make the most cost-effective decision for your project.

Ventilation

Ventilation is an important consideration for spaces like basements and bathrooms. Hopper vents, which can be purchased separately or integrated into your glass block window, cost an average of $20. These vents are a great way to allow fresh air to circulate while maintaining the stylish look of your glass blocks. Incorporating ventilation can enhance comfort in your space without compromising on design.

Size of Project

The size of your glass block project plays a big role in determining the overall cost. Larger projects require more materials and labor, which increase expenses. This includes not only the glass blocks themselves but also essential materials like sealant, spacers, and mortar. For instance, installing an interior glass block wall costs more than a window installation due to the amount of materials and work involved. Being mindful of the project's scale can help you anticipate costs and make informed decisions that align with your budget.

Benefits of Glass Block Windows

Glass block windows offer numerous benefits for your home, especially in areas like basements and bathrooms. They allow ample natural light to brighten your space while ensuring privacy, thanks to their unique designs and textures. With an R-value of 1.96, glass block windows provide better insulation than single-pane windows, helping to improve your home's energy efficiency.

Additionally, when installed with mortar, glass block windows are nearly waterproof, offering excellent protection against water infiltration. This durability makes them a smart choice for moisture-prone areas, adding both style and functionality to your home.

DIY vs. Hiring a Professional Glass Block Installer

Hiring a professional installer brings peace of mind, knowing that your glass block project is in expert hands. Professionals have the experience and skills to ensure precise measurements and safe installations, which are crucial for the longevity and performance of your glass block windows or walls. Their expertise helps prevent potential issues like moisture intrusion, which can save you from costly repairs down the line.

To install glass block windows as a DIY project, you'll need to purchase mortar at $10 to $40 for an 80-pound bag, a perimeter channel for $60, spacers at $20 a pack, and possibly silicone sealant, plus the glass block windows themselves.

Building a glass block or shower wall takes time, skill, and patience. It's especially important to hire a pro to install a glass block window because a poorly installed window can lead to moisture problems, which can turn into catastrophes if they're not caught early. Hire a local glass block installer to ensure your project is completed safely and professionally.

How HomeAdvisor Gets Its Cost Data

No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. After a project is complete, we survey real customers about the costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from 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.