New Windows Cost

Looking to find out the cost of replacing windows in 2025?

New windows cost around £375 to £450 per window. This includes material prices and window fitting labour costs in the UK.

The cost of new windows will depend on a variety of factors, though. This includes what material the window is made from (uPVC, aluminium, wood, composite), the style of window (casement, sash, bay), your location in the UK, and more.

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Keep reading to find out everything you need to know about the cost of replacement windows for different-sized houses in the UK.

How Much Do New Windows Cost?

How much does it cost to replace windows?

The cost to replace 8 to 10 windows in a 3 bed semi-detached house will total £3,750, taking between 2 to 3 days to complete.

The cost of window replacement can vary due to the number of windows you want to fit as well as the overall size of your house. The cost of fitting new windows will also depend on the size of the window, the type of window you want to replace, and the type you want to replace it with.

For example, the average cost of new windows for a 4 bed house can total £2,250 for a terraced home, but that price will increase if the property is detached as there will be more windows involved, and potentially more storeys to contend with, bumping up overall labour and supply costs - and even scaffolding fees.

Most homeowners change their windows if they've noticed an increase in draughts, as it is a perfect way to help save and cut down on energy and heating costs. Most new fittings use uPVC, which helps with insulation and keeping the heat in your home, instead of escaping out.

New Window Installation Costs

Window Fitting Labour Costs

Window fitters in the UK typically include labour costs in the total new window price that you're quoted by them. Installing new windows usually follows a consistent process, so tradespeople tend to be comfortable with quoting homeowners a fixed price per window.

If the quote is structured this way, then you can expect around 20% to 30% of the total cost of new windows to be labour costs.

This would put the cost of window fitting labour per window at between £100 and £150.

In some cases, you may instead be quoted a day rate for window fitting labour costs. As already noted, this isn't as common in the UK. However, it might be the case if you're negotiating with a sole trader or your project is complex or unusual.

The average window fitting labour cost per day is between £175 and £300, which equates to about £20 to £40 per hour for a standard workday.

Keep in mind: Window fitters typically work as a team of two people. This means you should expect the total window fitting labour cost per day to be twice as much as this, at £350 to £600.

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Different Types of New Window Costs

Windows come in all shapes and sizes - and their costs range, too. Let's look at some common new window styles to give you an idea of what's available for what price:

Double Glazed Window Costs

Starting with uPVC double glazing costs, a set of 4 casement windows start at £1,300 for supply only.

Triple Glazed Window Costs

In comparison, triple glazing costs £300 more for the same size of window, with the added benefit of an extra layer of glass.

Bay Window Costs

Bay window costs vary greatly depending on the size and material chosen, with uPVC being the cheapest and aluminium frames being the most expensive.

Velux Window Costs

Lastly, Velux windows cost anywhere from £630 for a top-hung window to £1,555 and above for a solar-controlled Velux window.

Additional New Window Costs

Once your new windows have been fitted, you should factor in some ongoing maintenance and upkeep costs to ensure you don't need to fully replace your windows again for a while.

Here's what you might need to consider:

• Window Cleaning: An ongoing cost that comes with owning windows is window cleaning. The cost of cleaning windows is typically calculated by house size, number of storeys and windows, but is around £45 for a semi-detached house.
• Windowsill Replacement: Your windowsill may have degraded over the years - and this is especially true if you have timber frames that are susceptible to warping with moisture exposure. The cost to replace your windowsills is around £175 on average, but costs are higher for stone and concrete sills.
• Broken Glass Replacement: It might not always be necessary for you to replace an entire window if just the pane of glass has broken. The cost of replacing a broken window depends on the size and type of window, but costs between £55 to £195.

Should You Hire a Window Fitter or a Joiner?

Window fitting specialists will typically be the go-to choice for most homeowners in the UK, as they're capable of efficiently installing new windows in homes where customisation isn't required. They're normally the lower-cost option if you're getting standard-sized uPVC, aluminium, or composite windows installed.

It might make more sense to hire a joiner if you want to install wooden windows. In particular, you'll want to consult with a joiner if you're looking for new windows that are non-standard sizes or with custom designs.

Unlike window fitters, joiners will quote for custom jobs like this on a daily or hourly basis. The cost of a joiner is around £200 to £300 per day, which equates to around £25 to £40 per hour for a standard workday.

How Long Does Window Fitting Take?

The average window fitting team can replace around 4 to 6 standard-sized windows per day. This means that a window fitting team can usually complete one window replacement for every 1 to 2 hours on a job.

This estimate assumes that your windows are easily accessible, no complications arise, and no custom work is required.

Here's a look at how long it would typically take a team of two window fitters to install new windows in different-sized houses:

It can take up to a week to install new windows in a larger property, as there are not only more windows — but a higher number of bigger windows, which tend to take longer for a specialist to install.

Building Regulations and Planning Permission for New Window Installations

One important factor you need to be aware of before fitting new windows is that you will need to get your new windows certified so that they meet UK building regulations.

When having new windows fitted, you will have to contact the building control at your local council to inform them of this. They will then arrange to come out and complete an inspection. However, this can come at an extra cost — which can vary depending on where you live in the UK.

You can also avoid an inspection by hiring a window fitting specialist who is FENSA-certified. They'll then be able to self-certify the new fittings and provide you with the certificate.

When hiring a tradesperson, be sure to ask whether they are FENSA registered.

Things to Consider When Fitting New Windows

When planning on installing new windows, there will always be things you will need to check off first. As with any home improvement plan, it is always a good idea to understand what the job entails and what your options are when planning.

Before fitting your windows, you will need to identify what type of windows you want for your home. A new set of modern windows will add to the overall look of your house, as well as increase the property's value if you wish to sell in the future.

A new set of uPVC windows could also last you 20 years, so make sure to choose a style of window you are certain you will be happy with in the long run – saving you the cost of changing them in the near future.

One of the most common types of windows is the uPVC casement window. The hinges of the casement window sit on the side, and by turning a lever either located on the side of the sash or at the bottom of the frame, the window swings open.

And as mentioned before, uPVC frames are durable, easy to maintain, stylish, and low cost — making them common in new fittings and new builds. Because of its plastic-like look, some people look for something a bit more stylish and can be put off uPVC frames.

However, modern uPVC comes in a range of colours and finishes. So, if you are looking for that timber look without the hassle of having wooden frames, then uPVC will still be a good fit.

Essentially, you will need to do a bit of ‘window shopping’ before you decide on what you want fitted in your home, as getting the right windows will make all the difference in the future.

Can You Install New Windows Yourself?

For any enthusiastic and experienced DIY person, fitting a new window could be a very rewarding challenge, especially if you are looking for a new project and want to put some new skills into practice.

However, we would recommend hiring a specialist for this type of job, as there are a number of complications that can occur when fitting new windows. The risk factor is just too high if anything were to go wrong, leaving you with a pretty expensive problem to fix.

One way that you could feasibly get involved and save on the cost of new windows is by dealing with the removal of the old window and frame yourself. This will significantly increase how many windows a specialist team can install per day and should have a noticeable impact on the new window costs you're quoted.

A team of two window fitters would typically be able to install about 6 – 8 windows per day if they don't have to worry about removing the existing windows and frames from your property.

You can start this by:

• Remove any opening windows by unscrewing them at the hinges. Be sure to remove it carefully, and ask for help when lifting the window out of the frame.
• You will then need to remove any non-opening or fixed window panes.
• You will now need to remove the frame, starting with the central uprights and then the outer main frame - a tip on doing this is to saw through the frame at an angle all the way to the wall, but make sure not to cause any damage.
• Then, by using a hammer and chisel, you can begin to remove the rest of the framework and levering off any awkward parts using a wrecking bar.
• Be sure to clear away any debris whilst working so as not to cause any injuries or damage, and to dispose of the old window, including glass panes and frames, responsibly.

By doing this part of the job yourself, you have saved on the time, effort and cost of your hired tradesman doing it.

Keep in mind: If you're considering installing new windows yourself, then it will likely take longer to complete the job than a specialist team. This is because you will likely not be as efficient or effective as an experienced tradesperson. It could also take longer if you run into complications that you're not prepared for.

Checklist: Hiring a Window Fitter in the UK

Ready to hire a local window fitter? Here's what you should keep in mind:

• Gather multiple quotes - at least 3 is recommended. This lets you compare costs, helping you find a reasonable price for your job.
• Ask for a written quote that details each part of the job. Be sure to check for waste removal fees or additional scaffolding hire costs, as these may be added as extras without you realising it.
• Check the window fitters' certifications. Look out for FENSA-registered specialists or fitters with other accreditations.
• Be sure to ask about the arrangements on the day of fitting - do you need to leave the property, tidy a certain area, or make space outside for your workers?
• Speak to your window fitter about the best window for your property - uPVC is most popular for energy efficiency, safety and durability.
• If you live in a restricted covenant or own a listed building, make sure you contact your local building authorities to ensure what you have planned is permissible.

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FAQs

Sources

https://www.planningportal.co.uk/permission/common-projects/doors-and-windows/planning-permission
https://www.planning.data.gov.uk/dataset/conservation-area
https://maghulldoubleglazing.com/single-glazing-vs-double-glazing/
https://www.gowercroft.co.uk/news/what-are-sash-windows/
https://www.pella.com/ideas/windows/replacement/benefits-replacement-windows