How much do glass block windows cost to install?
Ashburn, VA

How much do glass block windows cost to install?

Ashburn, VA

How much do glass block windows cost to install?

$300 – $1,500average cost per window installed

Get free estimates for your project or view our cost guide below:

$300 – $1,500 average cost per window installed


Get free estimates for your project or view our cost guide below:
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Jennifer Carlson
Written by
Jennifer Carlson
Edited by
Kristen Cramer
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Tom Grupa

Cost of glass block windows by size

Glass block windows cost $300 to $1,500 with installation on average, depending on the size, style, and whether it is a custom job or prefabricated. Glass block material prices are $10 to $60 per block. Glass block windows and walls are commonly used in basements and bathrooms.

Cost of glass block windows by size
Window dimensions (inches) Average cost installed (prefab window) Average cost installed (custom window)
25x25 $60 – $300 $400 – $1,400
31x31 $70 – $350 $450 – $1,500
36x36 $100 – $500 $550 – $2,800
48x48 $160 – $800 $600 – $3,900

Get free estimates from window installers near you.

Glass block window prices by material

Block prices range from $10 to $60 per block before installation, depending on the material. Acrylic block windows are harder to find and limited style-wise, but they're lighter and more durable than glass. Glass blocks come in a wider variety of prices, styles, and colors.

Glass block prices by material
Block material Average price per block*
Glass $10 – $60
Acrylic $15 – $25

*Not including installation.

Glass blocks come in a range of sizes but are typically 6- to 8-inch squares and 2 to 4 inches thick.

A home with a glass block wall separating the living room and hallway.
A home with a glass block wall separating the living room and hallway.

Glass block cost by location

Glass block windows and walls often cost more when installed on a home bar or accent wall because they are more likely to be custom-made. Basement and bathroom windows are more likely to have prefabricated options.

Glass block cost by location
Location Average cost installed
Bar front $1,000 – $3,000
Basement window $300 – $1,200
Bathroom window $400 – $3,000
Wall $1,300 – $5,000

In comparison, a standard glass window replacement costs $xxx to $xxx per window, depending on the size and frame material.

Cost to install glass block basement windows

A glass block basement window costs $300 to $1,200 installed, depending on the size and style. Different safety options are available for basement block windows, including fire-rated glass and impact-resistant blocks.

A finished bedroom or living space in a basement legally requires an egress window for escape in an emergency, and glass block windows do not qualify. An egress window costs $3,000 to $7,000 with installation.

Glass block in the bathroom or shower

A glass block window in a bathroom or shower costs $400 to $3,000 with installation, while a glass block shower wall costs $1,000 to $3,000. Glass blocks are most commonly used in bathrooms for windows and shower walls. Frosted or translucent styles preserve privacy in these areas.

In comparison, a standard glass shower door costs $400 to $1,900 installed for a prefabricated door or $1,400 to $3,300 for a custom door.

A glass block wall in a bathroom shower.
A glass block wall in a bathroom shower.

Glass block wall cost

A glass block accent wall costs $1,300 to $5,000 installed, depending on the size and style. Custom designs, curves, colors, and other styles cost more than a basic design with clear blocks. In comparison, a standard glass wall costs $xxx to $xxx when made with a glass pane instead of blocks.

Glass block window installation costs

Glass block materials make up 35% to 50% of the total project cost, with labor making up the other 50% to 65%.

Glass block window costs
Factor Average cost
Materials $150 – $500
Labor $150 – $1,000
Total installed cost $300 – $1,500

The following factors affect installation costs:

  • Prebuilt vs. custom – Prefabricated block designs cost much less than custom designs. Prefabricated windows come in basic shapes and designs but often have ventilation built in.

  • Brand – Prices vary by brand and retailer. Popular glass block manufacturers include TAFCO, Pittsburgh Corning, Seves, and Mulia.

  • Frame – Unframed glass block windows are most common, although some prefabricated sets come with a vinyl frame. Some framed glass block windows can be opened, but most glass block designs are not functional.

  • Ventilation – Glass block windows and shower walls may need ventilation, which costs about $40 to $60 to add.

Labor cost to install glass block windows

The labor cost to install glass block windows is $150 to $1,000 total on average. Complex custom builds cost more in labor than small jobs using prefabricated glass block windows.

  • Contractor ratesA handyman charges $50 to $80 per hour on average, while general contractors charge $50 to $150 per hour.

  • Installation type – Traditional mortar costs less than silicone or vinyl mortar, which are durable and waterproof.

  • Job complexity – Custom jobs, curved walls, intricate block patterns and layouts, and difficult site conditions typically drive up labor costs.

  • Repairs – Preexisting damage to the surrounding wall or trim may cost extra to repair:

A bathroom with a glass block window over the tub.
A bathroom with a glass block window over the tub.

Glass block price by style

Glass block prices are $10 to $60 per block, depending on the style. Plain, clear blocks are the least expensive. Frosted, diamond, and colored blocks usually cost more.

Get free estimates from window installers near you.
Glass block prices by style
Pattern or style Average price per block* Details
Alpha $10 – $25
  • Large circle in the middle of clear glass
  • Common in living spaces
Wavy  $10 – $25
  • Provides privacy and light
  • Popular for basement windows
Frosted $15 – $50
  • Textured glass
  • Provides privacy and blocks some light
Ice $15 – $50
  • Frosted and wavy
  • Popular in bathrooms or private spaces
Diamond  $10 – $60
  • Internal pattern
  • Use for privacy and accent walls
Leathered  $10 – $40
  • Rare
  • Similar to frosted but less opaque
Clear  $10 – $20
  • Less privacy but maximum amount of light
Color  $20 – $60
  • Can be monochromatic or a mixture of multiple colors

*Not including installation

Glass block windows FAQs

Are glass block windows energy efficient?

Glass block windows are energy efficient because they are airtight and prevent heat from entering or leaving your home. A glass block window blocks UV rays and has a higher R-value than a standard single-pane window.

Can you replace a single glass block if it breaks?

Yes, you can remove and replace a single glass block if it breaks. Contact a professional to make sure the block is replaced properly and the wall or window isn't damaged further.

Can you see through glass block windows at night?

You can see through glass block windows at night only if they're clear or transparent. Frosted or translucent glass block styles either partially or completely obscure the view. If anyone tries to look through them, they'll only see a vague shape.

Are glass block windows hurricane proof?

Some manufacturers make glass blocks that meet the requirements to be considered hurricane proof. Standard glass blocks are typically 2 to 4 inches thick, which makes them durable if not indestructible.

Are glass block windows out of style?

Glass block windows have gone in and out of style for many years but are becoming popular again, especially contemporary designs, shower windows, and accent walls.

Getting estimates from glass block window installers

When hiring a glass company or window installer near you, consider the following steps:

  • Choose a licensed, bonded, and insured company.

  • Get multiple estimates of similar styles to compare.

  • Read reviews from previous jobs on HomeGuide and Google.

  • Get a written estimate, contract, and warranty in advance.

  • Follow a payment plan. Only make the final payment when the work is completed.

Questions to ask

When hiring a glass block installer, ask these questions:

  • How long have you been installing glass block windows and walls?

  • Are you licensed, insured, and bonded?

  • Is my block style in stock? If not, how long will it take for it to ship?

  • What style do you recommend for this project?

  • Will you subcontract any of the work?

  • How do you handle on-the-job damage?

  • Does your estimate include delivery and cleanup?

  • How long will the installation take?

  • What does your warranty include?