Bay windows add style to any home, bringing in natural light, providing sweeping outdoor views, and even creating additional seating. These windows are expensive, but with proper planning and budgeting, they can transform your space.

We at the This Old House Reviews Team have researched bay window costs and available styles from top window brands to help you kickstart your next home improvement project. We’ve also provided saving tips.



Bay Window Cost

Bay windows can cost anywhere from $750–$4,800 each but average around $1,900. Homeowners can expect to pay $1,125–⁠$4,800 total, including additional labor costs.

Bay window costs vary based on the following factors: 

  • Bay window type: Bay windows come in various types that vary in cost depending on their design, details, and complexity. 
  • Size: The larger the window, the higher the price. 
  • Window frame material: Bay windows made from inexpensive materials, such as vinyl, are more budget-friendly than expensive options, such as wood. 

Cost by Bay Window Type

Bay window prices vary by type. Box bay windows are more affordable than traditional full bay windows, while oriel bay windows cost considerably more than other types. Here’s an estimated price breakdown for each bay window type.

Bay Window TypeAverage Cost for Window TypeAverage Cost With Installation
Box Bay$750–⁠$1,200$1,125–⁠$1,350
Circle Bay$1,800–⁠$3,200$2,700–⁠$4,800
Canted Bay$1,050–⁠$2,800$1,500–⁠4,200
Oriel $1,125–⁠$3,250$1,600–⁠$4,800

Bow Windows

Bay windows and bow windows are often confused due to their similar designs. Bow windows are usually picture windows that don’t open, while bay windows are movable. Bay windows are also typically made offrom three to four separate windows, whereas bow windows use five to seven windows or more. Bay windows have sharper angles than bow windows, which have smooth, curved angles that form their distinctive shape. 

Bow windows cost more due to their complicated design. They average $1,600–⁠$4,800 and can range as high as $2,400–⁠$5,300 with installation costs. 

Canted Bay Windows

Also referred to as full bay windows, canted windows have the most traditional bay window shape. They have three window panes with a larger center window that runs parallel to your home. The two smaller windows are angled at 30 or 45 degrees.

These windows run down to the floor and include a nook for storage space or a sitting area. Canted bay windows are always on a home’s first floor. They cost $1,050–⁠$2,800, or $1,500–⁠4,200 with installation. 

Circle Bay Windows

Circle bay windows originate from the English Victorian age. They form a semicircle, making them more pronounced than bow windows. These windows have additional embellishments and crown molding to enhance their decorative appeal. They cost $1,800–⁠$3,200, or $2,700–⁠$4,800 with installation. 

Box Bay Windows

Box bay windows, or box windows, are smaller than classic bay windows and form a box shape. The small side windows form a 90-degree angle from the center window to create a rectangle ideal for displaying plants or decorations on the formed ledge. Box bay windows provide the benefits of a bay window but for less money, starting as low as $750–⁠$1,200 or $1,125–⁠$1,350 with installation. 

Oriel Windows

Oriel bay windows date back to the English Renaissance. They’re ornate and don’t touch the ground, making them an excellent addition to any floor. Although these windows don’t provide much extra space, they elevate your home’s aesthetics: The bottom is typically decorated with carvings, sculptures, and figures. You can expect to pay $1,125–⁠$3,250 for oriel bay windows, or $1,600–⁠$4,800 with installation. 

Cost by Size

Bay windows are considered quite large, costingso they cost more than traditional window styles. They’re custom-built and can be as small or big as you want, but they are typically between 3 feet and 10 feet wide and 3 feet and 6 feet high. The larger the window, the more it will cost. We’ve calculated bay window costs based on some typical sizes below.

Window SizeAverage Cost for WindowAverage Cost With Installation

Cost by Window Frame Material

Whether you choose a low-maintenance vinyl or a rich wood, material costs must be considered when creating your window budget. Here are prices for some of the most popular window frame materials.

Window Frame MaterialAverage Cost for Materials


Aluminum bay windows work well in warm climates and resist bending and warping. Aluminum is strong and lightweight but not energy-efficient. Aluminum bay windows cost $375–$1,800 on average. 


Fiberglass bay windows are as sturdy as aluminum ones but offer the energy efficiency of vinyl windows. You can customize them by adding a wood appearance without paying for real wood windows. Fiberglass bay windows cost around $500–$2,800. 


Vinyl bay windows are a low-maintenance, affordable option for homeowners on a tight budget. These windows are durable and energy-efficient but have fewer customization options than other materials. Vinyl bay windows cost $600–$2,800 on average.


Wood bay windows are the most expensive but most visually appealing. They come in various wood types and can be customized with interior and exterior colors. Wood windows can crack and peel over time and require regular maintenance. However, they can be repaired, saving on replacement costs. Wood bay windows cost $850 to $3,800 on average.



Factors Affecting Cost

Several factors affect bay window costs, including labor, design, brand, and energy efficiency upgrades. Here’s an overview of the key factors affecting your bay window budget. 

Bay Window Roof Add-on

If you have a roof that extends out around your home, your bay windows may be protected from heavy rain and snowfall. If not, your windows will be unprotected from the elements and could sustain long-term damage. You may need to install a separate roof for your bay window for added protection. Many homeowners match their bay roofs to their homes to create a unified look. Costs vary by material and design.

Energy Efficiency Upgrades

Window replacement projects are an excellent opportunity to increase your home’s energy efficiency. Although energy-efficient bay windows cost more, you’ll save more on utility bills in the long run. According to Energy Star, you can save $27–$197 on your energy bills annually by upgrading to Energy Star-certified double-pane windows. Look for multi-pane windows and efficient window frame materials. You can also use energy-efficient glass with a low-emissivity (Low-E) coating and argon gas to improve insulation.


It’s important to consider how you want your windows to function. Though most bay windows have a fixed window in the center with two side windows, you can change the design and incorporate functioning windows. 

For example, some homeowners use opening casement windows instead of fixed picture windows to allow for better air circulation. Other designs use double-hung windows for each part of the bay window. Adding non-traditional window styles to your bay windows will increase your costs. 

Labor and Permits

Installation costs can increase window prices by 40% to 60%. Bay windows are more expensive to install than other window types due to their size and complicated design. Most window installers require additional help for bay window installations, and the installers will need to cut a hole in your exterior wall. Your bay window’s location also impacts labor costs, as installations on higher floors require special equipment and tools. 

You may need a permit to complete an external build on your home. Your installers may file the paperwork for you, or you might have to do it yourself. Check your local city and county regulations before starting a bay window project. 

New vs. Replacement Bay Windows

Installing new bay windows is more expensive than replacing existing ones, as installation companies charge more to cut a hole for a new window. This could double your individual window costs depending on your project size. Companies such as Renewal by Andersen offer affordable bay and bow window replacement options, though bay window replacements are still costly. 

Window Brands

Bay window availability varies between window brands. Pella, for example, offers bay and bow windows in five different product lines. Other companies such as Simonton, Andersen, and Jeld-Wen sell bay and bow windows in various materials, sizes, and customization options. Product availability depends on the window manufacturer in your area. You should also consider that more popular, name-brand manufacturers will cost more than local alternatives.



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Professional vs. DIY

Although you can install many other window types on your own, installing a bay window is too complicated. Bay windows are large, hard to maneuver, and require cutting into your walls, so hiring a professional is best. A window installer will have the necessary tools, experience, and additional hands to complete the installation properly. You’ll also get the added protection of a labor warranty to cover any faulty installations or workmanship issues.

A professional window installer can recommend the best windows for your project and ideal locations for the installation. They’ll provide an itemized quote and a project timeline. It’s important to research your prospective installer, review their previous jobs, and verify their credentials. We don’t recommend working with an unlicensed window installer or contractor.



Benefits of Bay Windows

Here are some of the benefits of installing bay windows in your home. 

  • Added seating and storage: Bay windows create additional space indoors. Many homeowners build a window seat, but you can also use this space for extra storage or a bookshelf. 
  • Curb appeal and home value: These visually stunning windows can upgrade your home’s overall appeal. The added square footage and new windows will also increase your home value. 
  • Improved natural light and views: Bay windows let more natural light into your home, adding ambiance and warmth to any room. They also provide better views of your surrounding landscape and scenery.
  • Increased room size: Bay windows can add 10 feet or more to your living space, thanks to their protruding structure. The added footage depends on your bay windows’ size and depth.



How To Save on Bay Windows

Bay windows cost more than other window styles due to their size and multi-window design. Below are a few tips for keeping costs low.

  • Compare quotes: Get quotes from multiple companies to find the best deals. Many window manufacturers offer discounts for new customers. You should also compare customization options and warranty coverage. 
  • Limit your installations: Bay windows are a beautiful addition to any home, but costs can increase quickly with the more windows you install. Limit your bay window installation to rooms with frequent traffic, such as a kitchen, living room, or den. You can also use a bay window as an accent piece for your home’s exterior. 
  • Low-cost window materials: Wood bay windows are elegant but expensive. Consider cheap window replacements and materials to maintain a reasonable budget.
  • Negotiate your final price: Some window companies are open to negotiating installation prices. If your quote price seems too high, negotiate for a lower price. You can also use other quotes as leverage for a better deal.



Our Conclusion

Bay windows cost considerably more than other windows to install, but the added curb appeal, improved natural light, and additional space make them worth the investment. Your final project costs will depend on your selected window style, size, and material. We recommend working with a professional window installer to ensure your project is completed efficiently. Request at least three quotes from different companies to compare their services and rates. 

Use the tool below to find professional window companies that service your area.



FAQs About Bay Window Cost

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