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How Much Does It Cost To Install A Garden Window?

Typical Range: $1,000 - $4,000

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2021 Notice: Material Prices are Surging

Demand for windows has grown over the past year. And, as a result, manufacturers are increasing materials prices. Prices have gone up 5% to 10% this year, and many parts of the country are experiencing long delivery times. If you're planning a window installation or replacement project, we recommend starting as early as possible in the season, preparing for potential price fluctuations, and allowing extra time to order materials.

Garden Window Prices

Materials and professional installation costs for a garden window range from about $1,000 to $4,000. Depending on size and materials, the cost without installation starts at around $500 and ranges to $2,400, with an average of $800.

the average cost to install a garden window is $2,500 or $1,000 to $4,000

Adding a garden window to your home allows you to grow flowers and herbs indoors, no matter the time of year. Also known as greenhouse windows, they protrude outward, creating a sun-filled, three-dimensional space with a 180-degree view. While you can choose to install windows on your own, professional installation will help prevent leaks and other potentially costly issues. Keep these factors in mind when considering installing a garden window.

Average Cost to Install a Garden Window

Average Cost$2,500
High Cost$4,000
Low Cost$1,000

Kitchen Garden Window Prices

The cost range for a window with glass panels and frame (not including installation) starts at about $500 and can run over $2,000, depending on factors such as size, materials and features.

Garden Window Prices by Material


Wooden garden windows tend to cost from $1,000 to $4,000, depending on size. This framing material offers the best insulation of all frame types, helping lower your energy bills. This material is paint or stain-able to match your home's décor but need regular maintenance.

If left untreated, it may warp, swell and splinter, which can interfere with your window's operation. They may be vulnerable to termite damage, but proper maintenance will deter insects. While wood is the most expensive choice, it does enhance the value of your home more than other types of window frames.


Standard vinyl garden windows tend to cost between $500 and $2,500, depending on size. This type of frame is the most common and inexpensive. Made from durable plastic material known as PVC, they offer a long-lasting finish that won't peel, chip, rust or warp. They're easy to clean with soap and water. While you cannot paint them, they come in a variety of colors to complement your home. However, they may become discolored in extreme heat. Vinyl is energy-efficient, holding heat in during the winter and keeping heat out in summer. While this type of frame doesn't add as much value to your home, they do offer a long-lasting, low-maintenance option.


Aluminum garden windows tend to cost between $800 and $2,000, depending on size. Aluminum frames are light yet sturdy. They come in a wide range of colors and sizes, and they're less expensive to customize than vinyl. They are low-maintenance and help block outside noise. However, they don't hold heat in well, so may not be an ideal choice for cold climates. Sometimes condensation or frost may build up between panes.

Consult with a Pro When choosing a Garden Window for your home

Average Garden Window Costs by Size

Size in InchesPrice Range For Window
Large, Over-sized$2,000-$4,000+

Prices by Top Brand

ThermaStar by Pella

Prices for ThemaStar by Pella garden windows vary by size but start at about $500. Vinyl windows from Pella come with a limited warranty that covers non-glass components for 10 years and glass components for 20 years.


The price of Jeld-Wen vinyl garden windows starts at about $600. Jeld-Wen offers a limited warranty; glass coverage lasts for 10 to 20 years. Vinyl components come with a lifetime warranty.


Prices for Andersen garden windows - known as box casement windows - start at about $700. They have vinyl exterior and wood interior frames. Andersen windows have a limited warranty. Glass portions fall under a 20-year warranty, and non-glass parts for 10 years.


Harvey garden windows cost about $600 at the low end. The vinyl components of Harvey windows come with a lifetime warranty, while the glass has a limited 20-year warranty.


Prices for Milgard garden windows start at about $1,000 for a 35 x 35 window. Milgard offers a full lifetime warranty on all components.

Solar Innovations

Garden windows from Solar Innovations use solar technology that allows plants to receive the greatest amount of sunlight. Price varies by size and includes installation. Solar Innovations offers a one-year warranty on aluminum products. The warranty for vinyl products varies, depending on the warranty offered by the manufacturer of the non-glass components, while there is a one-year warranty for the glass.

Hire a Professional to Install a Garden Window

Greenhouse Window Installation Costs & Factors

On average, professional installation costs from $300 to $1,000, depending on factors such as size, how much labor is necessary on the rough opening, and which types of changes will fit and secure the window. In most cases, installation charges will add about 20 to 35 percent to the cost of a window itself. However, professional installers may be able to get a better price.

Labor costs should include the actual installation, removal, disposal and cleanup. Steps involved in installation may include:

  • Covering floors and furniture in the interior to prevent damage
  • Carefully removing existing window
  • Flashing out to prevent leaks
  • Insulating with high-quality foam
  • Installing window
  • Caulking inside and out around sills and moldings
  • Cleaning up and disposing of materials and debris

Adding a New Window in the Kitchen

Expect to pay about $500 to $800 or more in installation costs to add a new window to a kitchen wall where none currently exists. These costs are due to added labor requirements, including creating a space in the wall. Factors such as plumbing, wiring, drywall repair, trim and interior and exterior paint add to the cost of the project and, in some cases, may need another professional to complete, such as a plumber or electrician.

Average Cost of Purchasing & Installing Replacement Windows

The average cost of buying and installing replacement windows ranges from $1,000 to $4,000 and up. The cost of replacing a window that's the same size as the existing one will be lower than the price required to expand the space to accommodate a larger-sized model.

Building Your Garden Window

If you're handy with tools, you can save hundreds of dollars by building your own garden window. You'll need the following materials:

  • ¾-inch exterior plywood ($40)
  • 1x4 pine ($10-$15)
  • tapered casing or drip tap molding ($5)
  • acrylic window well cover ($30)
  • drill ($50)
  • jigsaw ($50)
  • screwdriver ($5)

The costs of going the DIY route add up to just under $200, saving you around $800 or more.

DIY vs. Hiring a Pro

Installing a garden window yourself can save you hundreds of dollars, but it's not a simple project. Set aside at least two days to complete the installation and make sure you have the necessary skills before taking it on.

If you're the least bit unsure, hire a window pro. Mistakes on window installation can lead to more work - or even costly repairs - down the road. An incorrectly installed garden window could lead to damage from leaks as well as reduced energy efficiency. Though DIY installation is possible, play it safe and go with the pros.


Where can you buy garden windows?

You can find garden windows at home improvement stores such as Home Depot, Lowe's and Menards, as well as independent or local stores. In many cases, professional installers may be able to get a better price. When you're researching installers, be sure to confirm if you must buy the window or if they will source it as part of the installation cost.

What's the difference between a garden and a bay window?

The average cost of replacing and installing a bay window is about $2,200. While both garden and bay windows project from your house and offer peripheral views, the difference between the two lies in their angles, size and usage. In most cases, the sides of a bay window angle away from the house at 25 to 45 degrees, while garden windows tend to have 90-degree sides, creating more of a box shape.

Size is another differentiate. Garden windows tend to be smaller, with standard sizes reaching up to 48 by 48 inches. In contrast, bay windows can come in a wide range of sizes, including very large models that can accommodate seating and furniture.

These different windows also tend to serve different purposes in the home. While bay windows create a focal point or enhance a view, garden windows usually have a shelf that allows you to grow plants or display items, rather than simply create a view.

Can I buy used garden windows?

While buying used may save you few dollars up front, in the long run they may end up costing more in repairs. Today's windows are more energy efficient than ever, with advances such as double-panes that save energy, lower your electricity bills and reduce heat loss. In addition, used windows may be warped or otherwise damaged in such a way that they simply don't fit exactly the way they're supposed to. This may lead to drafts, leaks and further damage over time.

Hire a Garden Window Installation Professional
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