Windows are one of the most important parts of your home. In most cases, they are one of the first things that someone sees when they look at your property. For this reason, you should make sure to invest in high-quality sash windows. These windows will give you the most control over the airflow coming into your property. They also suit a wide range of homes, from modern to historical. If you want to install these types of windows, you should know that there are several factors that will affect how much it will cost. Let’s look at some of these considerations, so you can accurately estimate sash window prices in London.


One of the most important factors that dictate sash window prices in London is the size of the window. Generally, the larger the window, the more expensive it will be. This is because bigger windows will require more materials. There are a few steps that you can use to make sure that you get accurate measurements. First, you should make sure to take three horizontal measurements. Ideally, they should all be the same size. But if they aren’t, make sure to consider only the smallest size. You should repeat this process when measuring the vertical windows. This should give you a rough indication of how big the window will be. When you choose your window contractor, they will re-measure the window space more accurately.


The next factor that can affect the cost of the instalment is the type of materials that you want to use. For example, you can either choose a wooden frame or a metal frame. Each of these materials will have a different price. You should also consider the type of glass that you want. In some cases, you might want to tint the glass, making it darker. This can limit the amount of glare that you experience. It can also make your property more secure, as people will have more difficulty in seeing inside. However, this procedure can often make the windows more expensive to install.

Suggested further reading: Finding the appropriate repair parts for your sash window

Condition of the property

You might also want to think about the state of the property when you install your windows. This can affect whether you will encounter any unexpected problems. For example, if you have an older property, you might be more likely to get termites and wooden rot. This can impact on how easy it will be to install the windows. For example, in some cases, you will need to get the wall beams replaced or repaired before you can install the window. Because of this, the installation process will take longer and become more expensive.

Number of opening sashes

The sash is the part of the window that you can open and close. In most cases, you might only have one sash. However, larger windows might require two sashes. The more opening sashes you require, the more complex it will be to build the window. For this reason, these windows will be more expensive to install.

Colour and finish

You should also consider the type of finish you want. This will often vary, depending on the type of material that you choose to get. For example, if you get a wooden window, you might want to paint it, or you can simply stain the wooden frame. When considering which finish you want you should also think about how you will apply it. For example, will you stain the window yourself, or get a professional to do it for you?

Paying for professional installation

Once you have ordered and received your window, you will need to have it installed. While you can try to do this yourself, this isn’t recommended. There are several important stages in this process. If you do it incorrectly, it could damage the home. For example, the window might not be waterproofed properly, causing water damage inside the property. When you hire a professional company, your mind will be at peace, as you know that everything has been completed to a high standard. However, you will also need to pay for their fees. Generally, the more difficult the job, the more expensive it will be to get it installed. For example, you might want to customize the shape of the window or add a glass design. These elements are great ways to customize your window, but they will make it more expensive to install.

Get a quote

One of the best ways to make sure that you remain on a budget, you should make sure that you request a quote before any work begins. This will give you a rough idea of how much it will cost to install the windows. Most companies will be willing to visit your windows and provide a free quote. This is also a great chance to discuss your budget with the window installation company. They might be able to give you some tips on how you can reduce the cost of the process. As we discussed, several factors affect how much it will cost to install the window. It’s easy to overlook one of these elements when deciding on what window you want to install. By talking with a window installation company, they will be able to help guide you through the process, ensuring that you are happy with the finished product.


Sash windows remain one of the best ways to make an impact in London, suiting a wide range of buildings. However, as we discussed, there are several factors that affect sash window prices in London. By considering these factors you should be able to get a window that you are happy with and avoid breaking the budget. It’s also important to remember to be open to making changes. Often, you will need to deviate slightly from the plan to ensure that you complete the project on budget. Consider these factors to make sure that you get a great sash window at an amazing price.

This article was written on behalf of Fix a Sash by Pieter Boyce. Pieter has an intense passion for English Architectural history and has been specialising in the conservation of original wooden windows and doors for decades. His exceptional knowledge of timber windows and doors, both listed or non-listed, is attributed to his hands-on approach to learning all aspects of the complete restoration of original features as well as having personally surveyed thousands of items throughout his long tenure as a head surveyor for one of the largest window and door restoration companies in the UK. He now runs a boutique wooden window and door consultancy and fervently champions the retention of original windows and doors. To learn more of Pieter’s services, visit his website at