Light gray walls with white window frames and gray patterned window coverings

How much do new windows cost?

If you're researching the average price of new windows, our guide will tell you the different factors you need to consider so you can compare new window prices like for like.

There are many factors and variables that contribute to the cost of new windows that means every project can be vastly different from the next.

Everest windows are all bespoke and made-to-measure and we have well over 77 different style options to choose from to design your perfect window. We don't sell 'off-the-shelf' pre-made products, and on that basis, having a price list of pre-made sizes is a little complicated.

Unlike many other online window companies, our prices also include the cost of installation, which is different for every property and can impact the final cost of windows considerably.

As a guide to help you budget the cost of replacing your windows, we have outlined the average costs of new windows in this article. Please note, these are not actual list prices but guide price ranges only.

The average price for new windows (2026)

The cost of new windows is between £700 to £3,600 per window including installation, depending on options.

Material	Average new window cost inc. installation
uPVC casement window	£700-1,800 per window
Sash window	50% more than a casement window
Tilt and turn window	25% more than a casement window
Bay window	150% more than a casement window
Aluminium frame	25% more than uPVC
Timber frame	50% more than uPVC

What is the cheapest type of window?

A white uPVC casement window is the most economical type of new window costing between £700 to £1,800 (inc. installation) depending on size, glazing design and how many are being replaced in the property.

Window cost will increase based on the different options for material, frame style, type of glass installed and colour of the frame.

If cost is an issue, then a good quality uPVC white frame is the best option. If you have a period home, or want to consider enhanced energy efficiency then your new windows will be more of an investment.

Window styles and cost difference

Casement windows

A casement window is the standard and the oldest style of window in the UK. Hinged at the side (or the top) for opening, usually with a single or pair of opening windows in one frame. Casement windows in white uPVC are the most economical style of window you can buy.

The average price to supply and install a new casement window can be anything from £700 up to £1,800.

Sash windows

Usually found on period properties and buildings in London, the sash window is prized for its classic aesthetic appeal but its high maintenance compared to other windows. The window has two panels that slide up and down over the top of each other.

The cost to replace sash windows is usually 50% higher than an average casement window.

Tilt and turn windows

The tilt and turn window has become a hugely popular style for uPVC and aluminium windows because they can be securely left open for ventilation by tilting them inwards whilst remaining fully locked.

The cost to replace double glazed tilt and turn windows is 25% more than a casement window.

Bay windows

Bay windows are built out from the walls of the house and can require planning permission to build to the front of the house. The bay window has windows on the front and at the sides and for these reasons, bay windows are the most expensive to replace.

To replace uPVC bay windows including install will cost 100% more than the average casement window.

Window style	Average price for new windows (per window)
Casement windows	£700-1,800*
Sash windows	50% more than casement
Tilt and Turn windows	25% more than casement
Bay windows	100% more than casement

Everest white window in a living room setting

Casement Windows

White Everest conservatory window with divided panes

Tilt & Turn Windows

Everest kitchen with gray cabinets and a gray countertop

Bay Windows

Light gray walls with white window frames and patterned window blinds

Sash Windows

Window materials and different costs

uPVC windows

Unplasticised Poly Vinyl Chloride, otherwise known as uPVC, has been one of the most popular choices for double glazed windows in the UK since the eighties.

uPVC double glazing is thermally efficient, low maintenance and secure. It's also the most economical material for windows.

The average price for new uPVC windows to supply and install is between £600 to 1,800 depending on size, glazing design and how many are being replaced in the property

Aluminium windows

Aluminium window frames are popular for their durability and this makes them a solid long-term investment. Aluminium frames are popular for their durability and this makes them a solid long-term investment. They look good with slimmer frames and offer a sleeker contemporary look compared to uPVC.

The average price to supply and install new aluminium windows is 25% more than uPVC but around 25% cheaper than timber.

Wooden windows

Installing wooden windows is a long-term investment in your home as you pay a premium for the material, but they are highly desired and can add significant value to a property. Wooden windows look beautiful and authentic and are usually standard requirement for period properties and conservation areas. Nothing can compare to the stunning appeal of a newly varnished frame and the richness of real wood grain.

The average price to supply and install new wooden windows is 50% more than uPVC.

Frame material	Average cost for new windows (per casement window)
uPVC	£700-1,800
Aluminium	25% more than uPVC
Wood	50% more than uPVC

Light blue gingham window covering over white Everest conservatory windows

uPVC Windows

Everest conservatory window with open section showing garden view

Timber Windows

Everest conservatory black windows garden view

Aluminium Windows

Frame colour	Average cost for new windows (per casement window)
White uPVC	£700-1,800
Grey uPVC	10% more than white
Wood grain uPVC	10-15% more than white

Should I buy off-the-shelf windows?

Other companies might show a fixed cost for new windows where you can buy pre-made sizes 'off-the-shelf' in limited colours and materials. But, these windows don't take into account all the problems that can arise when fitting new windows:

Many houses have windows that are not a standard size
Frames are not straight due to building shifts
You might want windows to open a certain way
You might want bespoke easy-to-reach or secure handles
Listed properties have limitations on materials, style and colour

The cost of a new window listed on a website might seem cheap at first, but these list prices usually don't include installation. All Everest window costs are for supply and installation.

Most importantly, not all uPVC windows are built the same. There is a wide range of difference in the quality of uPVC with the cheapest being susceptible to warping and discolouration.

Are cheap windows good enough?

Badly-fitted windows, and badly-done home improvements can devalue a property and negatively impact the house price. Poor quality windows leave you at risk from:

Scratches on new frames and glass
Poor quality uPVC can warp over time
Incorrect frame sizes that need excessive expanding foam to force fit
Bad installation that causes damp, leaks or draughts
Double glazing desiccant - where the double glazing seal fails and you can see bits in-between the glass
Condensation between the glass from poor or failed seals
Fading on the frames

Cheaper off-the-shelf windows are often not a perfect fit and to make up for this an installer will use excessive expanding foam around the edges to fill in the gaps.

This can also cause damp, draughts and shorten the life of your windows.

Be cautious of new windows prices before an installer surveys your property – a reputable window installer will need to see your home before they can give an accurate cost of windows.

Can I install windows myself to save money?

In theory, DIY window installation can save on labour costs, but in practice it rarely works out cheaper for most homeowners. Installing new windows is a skilled job that requires precise measuring, correct fitting, and proper sealing to meet building regulations and avoid issues like draughts, leaks, or condensation.

In the UK, replacement windows must comply with Building Regulations (including thermal performance and safety standards). If the work isn’t carried out by a FENSA or CERTASS-registered installer, you’ll need to arrange and pay for a Building Control inspection and certification yourself, which can reduce or even eliminate any initial savings.

There’s also the risk of costly mistakes. Poor installation can lead to heat loss, water ingress, or even damage to the window or surrounding brickwork. All problems that may be expensive to fix later. In many cases, manufacturers’ warranties are also dependent on professional installation, meaning DIY fitting could invalidate your guarantee.

For these reasons, while DIY installation might seem cheaper upfront, professionally installed windows often offer better long-term value, performance, and peace of mind.

It's always recommended to buy new windows from a reputable brand company that install and supply, so that they take responsibility for a perfect fit and finishing.

How to compare the cost of new windows online

If you want to compare the cost of new windows like-for-like, you need a full quote that factors in all requirements to make sure your costs are comparable. To work out how much new windows cost you need to consider several variables:

Style of the frame
Size of the frame
Material used for the frame
Double or triple glazed?
Number of windows
Will you need scaffolding?
Do you need planning permission?
The cost of installation

What should your cost of windows quote include?

When researching the average price for new windows from different suppliers make sure that you compare like-for-like. Keep in mind that prices listed on a website don't reflect the full cost of windows and all the variables.

Ask your supplier to provide a full and transparent quote that lists everything that's included from the new windows cost to installation and any aftercare and warranties they offer.

What should be included in your cost of window quote:

A full technical survey of your property
The sizes, styles and colours of the frames
The materials to be used
Type of glass to be used
The window energy rating for the glass
Window furniture and handles
External window cills
Full installation including all fixings, trims and sealants
Disposal of your old windows

Most importantly, make sure you get a certificate to say your installer is registered with a competent person scheme, such as FENSA or Certass. This means that you have automatic approval for building regulations.

How do I know if my windows need replacing?

There are a few clear signs that indicate when your windows might be getting to the end of their life.

If your window shows signs of more serious issues, then it’s better to consider replacing them to avoid costly heating bills or damp and black mould in rooms.

Draughts and Cold Areas Near the Window

When a window’s seal deteriorates, restoring it to its original performance is rarely straightforward. Poorly performing windows can account for a significant proportion of heat loss in a home, so if you feel cold air around the frame or notice chilly spots near the window, it’s likely that warmth is escaping. This can make rooms harder to heat and increase energy costs compared with homes fitted with modern, energy-efficient windows.

Moisture Trapped Between the Panes

Any misting or water droplets appearing between the panes of double glazing is a clear sign the sealed unit has failed. This happens when the airtight seal breaks down, allowing moisture to enter and dramatically reducing the window’s insulating ability. Left unaddressed, this type of condensation can contribute to damp problems and mould growth, which may affect both the building fabric and indoor air quality.

External Noise Sounds Louder Indoors

Double glazing should significantly reduce sound from outside. If traffic, neighbours or general outdoor noise starts to feel more noticeable indoors, it can indicate that the glazing unit is no longer performing as it should. A compromised seal reduces not only thermal efficiency but also sound insulation.

Stiff or Difficult Window Operation

Windows that stick, jam or become awkward to open and close often point to frame movement or distortion over time, particularly with timber. When frames shift or warp, gaps can form around the edges, leading to heat loss and reduced security. In some cases, these issues can also place additional strain on locks and hinges.

If your window has a more simple problem, like loose handles, these can usually be replaced (depending on window compatibility) without a major expense.

How much are new windows for a 3-bed house?

When budgeting the double glazing cost for a 3-bed house you will need a price for how many windows there are.

An average 3-bed semi-detached house has 3-4 windows at the front and back = 8 windows.

An average small detached house has 4 windows front and back and 2 on the side = 10 windows.

Are grey windows more expensive?

Yes, coloured window frames including grey are about 10% more expensive than a white window frame.

The cost of Woodgrain effect uPVC is usually around 10-15% more than a plain white frame.

Is triple glazing windows worth the cost?

The cost of triple glazing is only 10-20% more than new double glazed windows, yet it's just under two-and-a-half times more efficient than old double glazing.

Standard double glazing windows have a WER rating of A, with A+ being the best rating on offer. Triple glazed windows achieve A++ rating for their efficiency. Triple glazing is 23% more efficient with a Uw rating of 1.0 compared to 1.3 for the best double glazing. Upgrading from old double glazing to triple glazing can expect 58% more energy efficiency.

The superior efficiency of triple glazing can help to create a house that reduces carbon emissions and uses less energy to heat. Depending on your needs, triple glazing is worth the investment for the increase in energy efficiency and comfort in your home.

What is the cost of secondary double glazing?

As an alternative to double glazing, secondary glazing might be a more economical option to consider.

Instead of replacing the full window, secondary glazing fits internally over your window recess to give a second layer of insulation over the window.

Why would you choose secondary glazing over double glazing?

If you live in a period property or have a clause in your lease that stops you from replacing your single-glazed (usually sash) windows.
You want to retain the style of your original windows.
You want to eliminate draughts without the expense of new windows.
You want to reduce the noise if you live next to a busy road.
Secondary glazing is great for acoustics and can reduce external noise pollution by up to 80%.

The cost of secondary glazing can be up to 50% less than installing double glazing new windows.

Does double glazing increase the property value?

House buyers in the UK rate double glazing and central heating at the top of their list when looking for a new home.

Double glazing can increase the property value by up to 10% if the windows are of good quality and the style and colour are in keeping with the property. Therefore, an investment in new windows can pay back if you are thinking of selling.

Beware though, the windows must suit the property and if you get this wrong you can decrease instead of increasing the value. For example, period properties suit timber frames and traditional sash windows. If you remove old sash windows to replace with uPVC double glazing you can devalue the house.

Can I not buy cheap double glazing windows?

Don't ever be fooled into thinking that cheap double glazing is a better option than paying more to install quality windows.

As we highlighted above, fitting uPVC in a period property instead of timber can decrease the property value and turn off buyers.

Poor quality double glazing can have a host of issues and you may also find that a cheap supplier has a cheap or non-existent guarantee. More importantly, only reputable well-established companies can offer a lifetime guarantee with the confidence they will be there in twenty years to replace a window if there is a problem.

Cheap window companies are more likely to not be around to honour warranties when you need them.

For any investment, you make in your home, quality should always take precedence over price. Trying to do anything on the cheap always turns out to be expensive in the long-term.

BSI ISO 9001 quality management systems certified