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Last updated: 13 March 2024

Bow Window Prices (UK) in 2024: Compare Costs & Save

bow window prices

With some bow windows, you’re allowing lots of ventilation and natural light into your space, creating some extra living space, and adding much character to your home. Bow window prices in the UK are dictated by the number of windows, their size, the frame material, the type of glazing, and the complexity of installation. 

In this guide, we’ll take a look at the cost of bow windows according to these factors. So, if you’re asking yourself: “How much do bow windows cost?”, then this guide is the perfect place to start. 

A bow window features at least 4 or more windows which create a curved shape that protrudes from the side of your house creating some extra living space on the inside to make a window seat. Compared to the installation of other window types, bow window installation costs will run higher because of the additional parts and labour required to build a structure that will support your multiple new windows. 

Bow windows are similar to bay windows since they protrude from the side of your home. The main difference is that bay windows have 3 facets and are typically rectangular in shape. Bay windows prices also typically start lower than that of bow windows. 

That’s why we’ll also take a look at some of the costs involved in the installation of bow windows, and share some key tips for limiting total bow window costs.

For the fairest and most accurate bow window costs, it’s always best to shop around for quotes from suitable window installer companies. By comparing their offers, you can find the most competitive prices and you can make your choice knowing that you have a good deal. 

GreenMatch has a free and easy way to get up to 4 tailored quotes from the best bow window installation companies in your area. All you have to do is fill in the form at the top of this page. With your details, we can match you with up to 4 installers from within our network, all of them vetted by us and based around your local area. 

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How much does a bow window cost in the UK?

So, how much does a bow window cost? For a home with 4 double glazed bow windows, you can expect prices to start around £1,430 and range up to £3,240, depending on factors such as size and material. 

In terms of size, single window units tend to range from 488mm width x 488mm height, up to 1,770mm width x 1,500mm height. Naturally, the largest windows will amount to the highest costs, as shown by the higher end of the price ranges below. 

The material you choose will also have a significant influence on the total cost. uPVC window prices are by far the most affordable among the most popular window materials, as well as being highly durable and maintenance-free, making it a highly popular option. 

Aluminium is also highly durable and works well in especially modern properties. Timber is the most expensive of the three, but remains a popular choice for its aesthetic charm. 

Those living in colder climates might prefer triple glazing over standard double glazing. A third glazing panel can do a lot for the thermal efficiency and security of your home. On the other hand, double glazing is cheaper and there are a few grants for windows and doors from government programs that could help keep the cost even lower.

The average U-value of triple glazing is 0.9W/(m²K), over 50% lower than double-glazed windows, which has an average U-value of 1.4W/(m²K). If indeed triple glazing is a good option for your home, then costs will more likely range from £2,000 to £4,535. 

If you live in a listed building or heritage property, then you may not be permitted to replace the glazing in your windows. In this case, you consider some less intrusive secondary glazing window options.

The table below shows some ballpark bow window cost estimates according to the material you choose to frame your windows. 

Cost of bow windows
Frame stylePrice for 4 double-glazed panels (Inc. VAT)Price for 4 triple-glazed panels (Inc. VAT)
uPVC£1,430 – £2,160£2,000 – £3,025
Aluminium£1,860 – £2,810£2,605 – £3,935
Wood £2,145 – £3,240£3,000 – £4,535

Based on our market research, the average cost of a 4-panel bow window in uPVC is £1,795. You can expect the cost to increase if you choose aluminium or timber windows, around 30% and 50% more respectively. Of course, plenty of people choose bow windows with 5 or more panels. The average cost of a bow window with 5 panels is between £1,820 – £2,825, and around £2,340 – £3,655 for 6 panels.

In terms of window styles, your choice will also affect the price you end up paying. Those keeping to a tight budget should consider casement windows, or if you’d like to enhance the period quality of your bow windows, then sash windows make a great choice, although they are more expensive because of their more complex design.

Bow window installation cost

There are a number of different factors that will affect the price you pay for bow windows. One of the most important costs to consider will be the installation of bow windows, especially if you don’t already have them in your home. Removing a standard window and building the structure for a bow window will add to the cost of the project, compared to the cost to replace bow windows already in place.  

Bow window installation costs vary depending on whether you have existing bow windows, a supporting structure and a roof cab already in place. If you’re interested in installing bow windows for less, then replacing existing bow windows with new ones of the same size is a sure way of avoiding huge costs mounting up. Bow window replacement costs in this case cost around £250 – £300 per window. 

You may also be happy to know that, when planning for new window installation, installers may offer a small overall discount the more units you install, so you may end up paying around the same for one unit versus multiple. 

However, for those who would like to have completely new bow windows, then there are some additional costs to consider. The process involves removing the old windows, professionally measuring out the new area, fitting the new windows, and attaching them with a cab roof and support structure. You should also take into account any finishing touches, such as insulation. Altogether, this takes considerably longer and requires more parts and labour than a usual window installation. 

Considering the potentially quite lengthy and costly installation process, it’s crucial that you discuss the project with your installer beforehand so that you’re aware of all the material costs, as well as parts and labour costs. Asking for a fixed, itemised quote is the best way to get an accurate overview of what is involved and how much you can expect to pay. 

Receiving multiple quotes from different installers will allow you to compare installer rates and determine which installer is offering the fairest prices. It can be tricky to be sure of an installer’s credibility, especially if this is your first time undertaking this kind of renovation. 

Luckily, with GreenMatch, you can rest assured that all of the installers in our network have been vetted against the latest industry standards. We’ll also help you find a good deal by matching you with installers based in and around your local area. This helps you avoid overpaying for the services of nationwide companies that will usually charge far more to cover their overhead costs. 

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Which is cheaper: bay windows or bow windows?

Generally speaking, bay windows cost less than bow windows, primarily because bay windows consist of fewer panels and use less material. However, the exact cost of either option will depend on a variety of factors, such as size, material, and glazing type. According to our estimations, bay window prices tend to start around £1,190, whereas bow windows start closer to £1,400.

Bay windows or bow windows?
MaterialBay (3 panels)Bow (4 panels)
uPVC£1,190 – £1,800£1,430 – £2,160
Aluminium£1,550 – £2,340£1,860 – £2,810
Wood£1,785 – £2,700£2,145 – £3,240

Bay windows are similar to bow windows, but far from identical. Bay windows typically have three panels, with a larger central panel flanked by two smaller ones, and project outwards from the wall at a 30 to 45-degree angle. Bow windows, on the other hand, consist of four or more panels of equal size, and are set at a more gentle angle that creates a more rounded projection. 

One key difference between bay and bow windows is the amount of space they take up. Because of their more substantial projection, bay windows tend to take up more room than bow windows. 

When considering bay or bow window prices, it’s essential to factor in any additional costs associated with installation. Installation for bow windows can be more complicated than installing bay windows due to their curved shape and the need for more panels, which can make them more expensive to install. Ultimately, the choice between bay and bow windows will depend on your personal preferences, budget, and the design aesthetic you’re trying to achieve in your home.

How to find the best bow window replacement costs

As we’ve discussed throughout this guide, replacement bow window prices very much depend on the types of windows you’re replacing and the scale and complexity of your project. In terms of the company you choose to install your replacement windows, then several other factors will also come into play. This includes the size of the company, the quality of the materials, and its location (relative to yours). 

When comparing companies, be sure to look out for any credentials they feature on their website to be sure of their qualifications. Also, check customer reviews to make sure that their previous customers are happy with the quality of service they have received. 

As you can probably tell, choosing the right company can take some time and practice to get right- not great if you’re in need of an urgent window replacement. This is where our exclusive quotes service can save you all this extra time and effort. 

Simply by filling out our quick and easy form, you will be matched with up to 4 professional installers in your area, all within 48 hours of completing the form. With multiple quotes, you have the opportunity to select the best deal between already vetted companies. 

It’s fast, reliable, and completely free! You’re also under no obligation to accept any of the quotes you receive. To get started, simply click the button below.

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Ciaran Wark
Written by Ciaran Wark, Writer

Ciaran is a content writer at GreenMatch. Whether writing about sustainable aviation fuel or heat pumps, Ciaran has passion for informing readers about pivotal technologies that are reshaping our world.

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