Bay vs. Bow Windows (2023 Guide)

If you want to boost your home’s curb appeal and open up your interior space with abundant natural light, look no further than the elegant and classic bay or bow window. At a distance, bay and bow windows look alike: They both feature a set of windows that open up a room and protrude from the home’s exterior walls, but there are slight differences.

Bay windows have angular lines and typically consist of a large picture window and two smaller operable windows on either side. Bow windows are curved, containing four to six glass sections of equal size. Read our guide to understand the basics of bay versus bow windows and what makes them stand out.

 

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What Is a Bay Window?

A bay window consists of three windows: a picture window at the center and two smaller casement or double-hung windows at the sides. Bay windows extend from the home’s exterior walls, and the two side windows typically angle at 45 or 90 degrees to meet the larger window. 

Whether it’s the bedroom, living room, or kitchen, this window type is ideal in almost any room of the house. Bay windows have numerous purposes, from a breakfast or reading nook to window seating or extra storage. These popular window types provide additional floor space and give an unobstructed outdoor view while the smaller windows open and let in fresh air. Bay windows are common in transitional and contemporary home styles as well as traditional homes, such as cottage or Victorian styles.

Bay windows are often confused with bow windows, as both types extend away from the exterior walls. However, bow windows have more window panels and are rounded rather than angular. Bow windows also require more space and can even go around the corner of your home.

Cost

On average, bay windows cost $900* for small and simple designs and up to $7,100 for larger, energy-efficient windows with added features. Bay window installation costs an additional $300 to $1,000 per window. The window material, size, and brand affect the price, as well as extra features such as a built-in window seat or a cozy nook.

*Article cost data via Home Advisor, Pella, and Angi. 

Materials

Bay window framing materials come in several varieties. Vinyl is one of the most economical materials, while wood is more costly. Higher-quality materials can increase your window price by thousands of dollars. Below are common window framing materials.

• Aluminum costs $360 to $2,050 and is resistant to deterioration.
• Fiberglass costs $400 to $2,500 and is best for large glass panes that don’t require extra support.
• Vinyl costs $570 to $2,950 and is the most cost-effective bay window material. Vinyl requires little maintenance and is known for its durability.
• Wood is $880 to $4,000 but requires regular staining and sealing.

Type

Bay windows come in various types and styles, ranging from $700 to $2,500. Here are four different bay window types and their prices.

• Box bay windows have flanking windows on their sides that meet the picture window at a 90-degree angle. Expect to pay around $700 for smaller box bay windows.
• Canted bay windows, or full bay windows, have a flat front window and angled sides. Canted bay windows cost $800 to $2,100.
• Circle bay windows have large glass panes with smaller panes above the windows, detailed with intricate moldings. This type costs around $2,500.
• Oriel bay windows first appeared during the English Renaissance, costing between $900 and $2,500. Oriel bay windows require the additional structural support of corbels, or brackets of stone or wood.

 

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What Is a Bow Window?

A bow window has four or more glass sections that extend from the home’s exterior wall or corner at a slight curve. Bow windows are referred to by the number of glass sections, such as four-lite bow, five-lite bow, or six-lite bow. This architectural style is common in Victorian-style homes. These windows provide a wider outdoor view and allow more airflow than bay windows.

Bow windows need at least 80 inches of wall space. Because these windows are heavier, harder to install, and have more glass panes, they’re typically more expensive than bay windows. Bow windows are heavy, and installations often require a soffit tie-in or an extended hip roof. If necessary, consult a structural engineer.

Like bay windows, homeowners can opt for additional features such as energy-efficient windows and window seating. Another option is using the extra floor space for a desk area or accent chairs.

Cost

A single premade bow window starts at $1,500. If you prefer custom work, it could cost $15,000 or more. The price of window replacement ranges from $2,000 to $4,500. If you’re installing a window in a new spot, expect to pay $3,000 to $10,000 or more. Besides the window, installation requires new framing, drywall, roofing, and siding. You may also need electrical work depending on your home’s layout.

Materials

Vinyl and wood are very common bow window framing materials, but you can also find aluminum, fiberglass, or composite. Here’s what to expect from each material type.

• Vinyl is the most cost-effective material and comes in premade designs. You can’t paint or stain vinyl, so finding the right color and style for your home could be challenging. Vinyl frames cost $100 to $900 per window.
• Composite frames refer to materials that combine several elements, such as wood fiber and plastic. They cost $300 to $1,200 per window.
• Fiberglass is weatherproof, long-lasting, and more environmentally friendly than most materials. Fiberglass is more expensive at $500 to $1,500 per window. 
• Wood bow window frames are the biggest investment in the long run; they cost $150 to $1,300 per window, but they require more maintenance than other materials.

Type

Bow windows are four to six glass panels of equal proportions. You can choose various types of windows for your arrangement, such as casement, single-hung, or double-hung. The more windows with operable sections, the higher the cost.

 

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Bay Windows vs. Bow Windows Comparison

When it comes to bay versus bow windows, there are small but important differences. Bay windows have three panels and offer a broader view with additional floor space. Bow windows have a curved shape and provide a more panoramic view, enhancing a room’s openness. Here’s a breakdown comparing bay and bow windows.

Factors	Bay Windows	Bow Windows
Window Size	At least 40 inches of exterior wall space	At least 80 inches of exterior wall or corner space
Number of Windows	Three windows	Four or more windows
Special Features	Energy-efficient glass Glass coating Interior trim finishes Window seat	Energy-efficient glass Glass coating Number of panes Operable vs. inoperable
Available Materials	Vinyl Aluminum Fiberglass Wood	Vinyl Composite Fiberglass Wood
Benefits	Lower in cost compared to bow windows Perfect for a bench or reading nook High resale value	Panoramic views Customizable Increased airflow
Drawbacks	Takes up more space around the home’s exterior Finding the right window treatments is a challenge	Harder to install Costly
Cost	$900–$7,100	$1,500–$15,000

 

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Our Recommendation

Adding a bay or bow window can improve your view and boost your home’s resale value. They’re also great for increasing natural light and airflow or adding extra space for a cozy nook or storage. But there are key differences, and one type may suit your home better than the other.

We recommend researching the best window style for your home and contacting several professionals for installation quotes. 

 

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