Bay Window Installation Cost


Written by:  Howmuchisit.org Staff
Last Updated:  August 13, 2018

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Bay windows, from the outside, can often draw more attention than a traditional window due to size and attractive features many have, often increasing the curb appeal of a home.

Adding space, warmth, lighting and functions, a bay window, of course, will come at a price.

Bay Window Installation Cost
Bay Window” (CC BY 2.0) by basheertome

How much does a bay window cost?

The cost of a bay window will depend on a few factors, including the size of the bay window, the type (either boxed or full), the complexity of the job (where the window is located, how large it is and if an older window needs to be replaced), the manufacturer, the contractor you choose and your geographical region.  Most contractors will often quote both the window and the installation, but some may just quote the installation, so you need to be careful when gathering any quotes to ensure you’re getting the price for both the materials and labor.

TypeWhat is it?WindowLaborTotal
BoxedAs stated, a boxed bay window is shaped like half of a box with glass on all of its side, with panels meeting at a 90-degree angle. Most of these types are smaller in size, usually smaller than 4x4 feet and are commonly found in the kitchen/dining areas.$500-$1,000$100-$400+ (straightforward job tends to be less while cutting a frame to size for a new window could be much more)$600-$1,400
FullA lot larger than the box mentioned above, a full bay window will meet at a 45-degree angle and will be found in the living room, dining room or in some higher-end bedrooms.$1,500-$2,000$100-$400+ $1,600+$2,400

NOTE:  These are the ranges for a straight-forward, even swap most of the time.  Be sure to read the extra costs to consider below to see what other factors may increase the costs.

As all jobs are so unique and there are so many factors which can affect the costs as you can see, we highly recommend you use the free tool HomeAdvisor.com.  With this tool, you can explain your job and locally licensed contractors will contact you with a free no-obligation quote.  No credit card is needed to use this tool and is 100% free.

BrandPrice Range (Window only)
Alside$800-$1,500
Andersen$900-$2,000
Atrium$900-$2,000
CertainTeed$800-$1,800
Jeld-Wen$600-$1,900
Marvin$700-$1,900
Milgard$800-$1,500
Pella$900-$1,900
Silverline$800-$1,300
Simonton$700-$1,800

NOTE:  Remember to add another $100-$500 for a simple swap and replace.  If it’s much more complicated, as we get into below, it can add $1,000+

What should be included in installation quote?

When quoted for installation, it should, at a minimum, include the removal and disposal of the old window, and the cleanup in the end.  Of course, the installation will be included as well, and this will depend on the scope of the job.  As a bay window is much different than a traditional window, if it needs to be installed for the first time, supports and a roof of some sort will be needed in order to support the bay window fully.

The extra costs to consider

For larger windows that need to be replaced and disposed of, a disposal fee, often ranging from $40 to $80 may apply, depending on your geographical location and dump fees.

Average bay window often used an asphalt shingle, but it can often be upgraded to copper or other materials for an additional fee.  This could increase the price by more than 30-40% on average.

From finishes to hardware, adding these optional add-ons can increase the costs by more than $500+.  Adding tint to the windows, for example, could cost about $600.

Taxes and permits are often not part of the contractor’s quote and need to be factored in as well, and depending on your local laws, a permit may need to be pulled, regardless of the install job.

In complex cases where a wall needs to be opened in order to frame the window, some experts recommend budgeting at least $60 per square foot to create just the opening.

If you’re not replacing an existing bay window and want to complete the look on the inside such as adding a shelf, bench and/or storage area, for instance, the average carpenter, depending on your local rates and the professional you hire, can charge anywhere from $700 to $1,500.

Upgrading the glass to a more energy efficient option can cost up to 40% more.

Tips to know

While these types of windows can add to your interior, they can impede on your walkway or patio if the location isn’t well researched.  Just remember these windows will pop out much more in comparison to a traditional window.

Ask your contractor about any bulk discounts.  In some cases, he or she may be able to bring down the costs if you were to install more than a few windows at once.

Talk with your local government or look online to see if your county/government offers any tax rebates/subsidies if you were to upgrade to a certain type of window.

Pros of a bay window

As they are larger, they will allow in a lot more natural light.

In some cases, the angled part of the window is able to allow in natural breezes, keeping a room cooler during the warm months and even warmer in the cooler months due to the additional sunlight.

Because bay windows add close to three feet more in space, you can opt to add additional shelving and/or seating because of it.  In some cases, if done right, a bay window can make a room appear larger than it seems.

As mentioned in our intro, a bay window almost always increase your home’s curb appeal.

The cons of a bay window

Because of all the glass, the warmth in a room can be a con sometimes, especially for those who live in a hotter climate; however, this problem can be fixed if you were to upgrade to a more efficient window.

Due to the unique shape of the window, it can be hard to find a window treatment.  While it is possible, plan on spending more for the material and hardware.

Already mentioned in the tips, a bay window will protrude from the home, often impeding on a walkway or patio, taking away from some of the outdoor space.  However, on the positive side, this lost space on the outside will add more floor space on the inside.

While a traditional window can often be installed by the average DIY-er, a bay window, even if straightforward, should be left up to the professionals.  A faulty job can often lead to load-bearing problems, causing foundation issues if not rectified.

Bay window material choices

On the market, there are four common types of material choices:  either aluminum, fiberglass, vinyl or wood. Steel and composite materials are also available, but often will not be found in a residential setting.

Aluminum – Aluminum, unlike vinyl, can be painted and is known to last quite some time, even in extreme weather situations.  Another reasonably priced option, it’s known to be very deteriorated resistant.

Fiberglass – As the most expensive option on this list, it can be painted, but it cannot conduct heat or cold as well as vinyl or aluminum.  Unlike wood, however, it will not expand or contract as the temperatures change, making it a very durable choice.  Due to its lightweight features, fiberglass bay windows can hold a larger-than-average glass without the need for special supports.

Vinyl – Being one of the most affordable options, vinyl can cost up to 50% less than wood.  Durable and low in maintenance, it’s available in a myriad of colors, but keep in mind it cannot be painted.  Over time, it can begin to age due to excessive sun exposure or as it naturally ages.

Wood – Designed for those who want an organic look, wood bay windows will require a lot of maintenance over the years, such as staining and sealing, as the wood expands and contracts with the outdoor temperatures.  While wood can cost more than most of the choices on the market, it is known as a great insulator and can even increase the value of your home due to the aesthetic values.


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