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Windows

Bay Window Costs

Average cost range:

$1,732 - $3,690

The average cost to install a bay window is $1,732 to $3,690 per window as of 2024, which includes the cost of bay window materials ($1,393 to $2,969 per window) plus labor and installation by a local contractor ($70 to $150 per window). The national average replacement cost is $2,551 per window. Be sure to talk to a local contractor to get a quote fitted to your home and needs.

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Replacing a bay window or installing a new one involves costs ranging from materials to labor to your choice in frame and glass types. Here’s what to know about bay window prices.

bay window in a living room

How Much is a Bay Window?

A bay window involves three different windows angled together to jut out from your home and create additional indoor space. Your bay window price will first depend on what kind of bay window you have, if all three of the windows need to be replaced or just one or two of them, and if you already have the bay window installed or need a brand new installation. Below, we look at each of these elements.

You can also visit our bay windows guide to find all the information you need about the design and style considerations you should know about this window type.

Cost of a Bay Window: Labor vs Materials

The average cost for a vinyl, medium sized, three-panel replacement bay window is $1,732 to $3,960, which includes the cost of materials plus installation. Let’s break the cost of installing a bay window down into parts.

Bay Windows

Average Installation Cost $1,732 - $3,960

Cost Breakdown

  • Materials 95.4%
  • Labor 4.6%

Bay window materials, such as the window glass and frames, should cost an average of $1,393 to $2,969 per window.

For each bay window, labor and installation costs an average of $70 to $150. Demolition and materials will be factored into the cost of bay windows.

There are several other factors that can influence the price you’ll pay when you’re replacing a bay window, such as their size, and the type and brand you choose. We’ll break down each of those factors on this page.

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Bay Window Sizes and Prices

Although bay window replacements can be custom made, they generally range in size from 4 to 10 feet wide by 3 feet high. For a breakdown of the cost of bay windows by size, review the table below.

Bay Window Sizes
SizeCost
4'x3'$750–$1,800
6'x3'$850–$2,800
8'x3'$910–$3,200
10'x3'$1,150–$4,850

You can read more about average bay window sizes, the smallest bay windows available, and the largest bay windows available.

Bay Window Costs by Brands

Just as you want to find the best contractor when you replace bay windows, you also want to choose the best brand. Not only does the brand you pick for bay window replacement matter because you want a high-quality product that will last a long time, the right brand is important because not every product may be appropriate for the look you’re trying to achieve for your home.

One of the top brands for bay window replacement is Andersen Windows. For over a century, the company has been known for both the quality of its windows and its customer service, making it one of the best brands for bay window replacement. From colors to frame types to shapes to operable styles, Andersen Windows has a wide range of products to choose from, and these windows are well-known for their energy efficiency as much as their quality.

Another top brand is Pella — known for its sustainable and energy-efficient products — which boasts over 150 patents so you have a large catalog of windows to choose from. The company offers windows that are aesthetically stylish while still being affordable, so homeowners can replace bay windows without worrying about breaking their budget. Also, you can further save money with this brand because Pella products will help lower your utility bills.

Bay & Bow Window Price by Brand
Bay Window BrandsPrice per windowInstallation Costs
Alside Bay Window$1,525 $1,989
Andersen 400 Bay Window$2,045 $2,582
Atrium Bay Window$1,756 $2,045
CertainTeed Bay Windows$988$1,300
Harvey Bay Windows$1,050 $1,289
Jeld Wen Bay Windows$1,692 $2,093
Loewen Wood Bay Windows$1,985 $2,208
Marvin Bay Window$1,567 $1,843
Milgard Bay Windows$1,299 $1,567
Pella Bay Windows$1,800 $2,245
Ply Gem Bay Windows$1,389 $1,625
Simonton Prism Bay Window$1,100 $1,387
Simonton Prism Bow Window$995$1,399

Before You Replace Bay Windows: What Impacts Bay Window Prices

If you want to replace a bay window, the following are some considerations that can ultimately impact your project’s cost. Some of these are only applicable to installing a new bay window, some are applicable to bay window replacements, and some are meaningful to both types of projects.

replace bay windows

Size

Bay windows are usually 4–10 feet wide by 3 feet high. When you make your decision, consider the size of your current windows. If the new ones will be larger than the ones you have, that will add to the cost of the project.

Eaves

An eave is the edge of a home’s roof that hangs over the exterior siding. Bay windows tend to be installed beneath a home’s eaves, so it’s important for contractors to measure them for the proper fit. When there are no eaves on a house, a small roof is constructed for the windows.

Sash

Sashes are necessary to keep any window in place, so you need to pay attention to the kind of sash that fits your specific window. For example, narrow windows work best with a casement sash, while double hung windows need larger sashes.

Frame and Glass

Usually bay windows have small frames, although that may differ depending on the type you choose. Also, you should think about the type and color of glass you’d like to use in your windows, as well as the coating the windows should have.

Installation Location

Although these windows can be installed in living rooms, kitchens, bedrooms, or home offices, you should think about the best place to get a bay window replacement. Depending on the size of the room, as well as how much light and ventilation you want, bay windows may not be the right option for certain areas of the house.

Structural Support

Bay windows can add beauty to your home, but they also add extra weight to its structure. As a result, they need to be supported in some way to maintain the structural integrity of the house. Some options for providing support — depending on the type of bay windows you choose and their location — include installing tension cables, tie rods, reinforced concrete beams, or steel braces to secure the windows in place. Otherwise, the home may sag or even collapse from the weight of the windows.

Budget

While replacing bay windows can add value to your home in the long term, it’s still important to consider your budget in the short term. These windows can be pricey, even when you choose the most affordable options, so as you work with your contractor, don’t forget to keep your eye on the budget.

Climate and Material

Just as with other types of windows, you’ll want to work with your contractor to get the right materials for your bay windows based on your climate. Depending on the weather where you live, certain types of glass may work better for these windows to ensure you’re able to take advantage of the energy efficiency these products provide, as well as making your home as warm or cool as you’d like.

Cleaning and Maintenance

To ensure that your windows always look great, you’ll want to do a deep cleaning at least once a year. This not only includes the interior and exterior of the glass, but also the hardware, frames, and screens.

Lifespan

Bay windows have a long lifespan, so depending on the type you choose, they can last between 20 and 25 years. Of course, this also depends on how well they’re installed, so you want to find someone who specializes in bay window installation to decrease the chances of shoddy work shortening the windows’ life expectancy.

Finding Bay Window Installers

bay window in a dining room

It can be challenging to find the right bay window replacement installer, but Modernize is here to make it easier. We have vetted professionals in your local area, so you can choose a window installer with confidence because you know they have the experience needed to get the job done. 

As you explore your options, be sure to use our interactive checklist, which will help you easily weigh the pros and cons of each potential contractor you’re interested in.

We always recommend getting three to four quotes for your project so that you can find the best price.

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FAQ

Can bay windows be replaced?

Yes, they can! You can replace all three of the individual windows that make up your bay window or replace just one or two of them. You can change the window type, frame type, and more during the process.


What is the average cost of a bay window?

A bay window made up of three medium-sized windows with vinyl frames has a national average cost of $2,551 according to our cost partner, RSMeans.


Are bay windows more expensive than other windows?

If you are installing a brand new bay window, it will be more expensive than to simply add or replace a normal window. However, if you are replacing the windows in your bay window, the cost will be comparable to other window replacements.