Blog>Cost Guides>New windows cost guide and calculator
Last updated: 9 December 2024
New windows cost guide and calculator
Understand everything you need to know about the cost of new windows and price up your project with our handy online calculator.
Understanding how much new windows cost and the factors that influence the overall price is essential when considering upgrading or replacing your home's glazing.
Here, you'll find everything you need to know to help budget for your project with confidence.
Cost calculator for new windows
Know what you already want? Then, for a quick estimate, why not add your preferences below?
Add items (specify quantity of each)
Item | Avg Unit Cost | Your Cost |
|---|---|---|
Install uPVC window frame | £80.00 per window | |
Install wooden window frame | £90.00 per window | |
Install glass | £27.50 per window | |
Glass replacement | £100.00 per window | |
Secondary glazing | £400.00 per window | |
Triple glazing | £1,200.00 per window |
Optional extras (specify quantity of each)
Item | Avg Unit Cost | Your Cost |
|---|---|---|
Cutting brick and installing lintel | £600.00 each | |
Removal of old window | £27.50 per window | |
Window tinting | £300.00 per window | |
Obtain FENSA certificate | £25.00 each |
Estimated overall cost:
£0.00
Working with professional estimators, we collate cost estimates for the common home improvement and repair jobs in the UK. All the costs are estimates only and for accurate costs for your particular requirements, you are encouraged to reach out to professional tradespeople to receive a quote for your job. Read our disclaimer for more information.
Factors that impact the cost of new windows (UK)
The cost of new windows varies depending on three main factors:
The style of window you choose
The frame material
The type of glazing you opt for
Then there's the cost of installation, plus extra costs such as scaffolding, waste removal, and 'making good' to factor in.
We explore each of these elements in more detail, below, helping you to better understand the rough cost of new windows in the UK.
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How much are new windows, by style?
Think of window style as the design aesthetic. In the UK, the most popular options include Casement, Sash, Tilt and Turn, and Bay.
Casement windows
Casement windows are hinged at the side or top and are one of the most common types of windows in the UK.
| Cost provided item | Unit | Range - Low +VAT | Range - High +VAT | Average cost +VAT |
|---|---|---|---|---|
| Flush casement windows prices | (Window and installation) 600 x 900 mm | £300 | £400 | £350 |
| Flush casement windows prices | (Window and installation) 1,200 x 1,200 | £450 | £550 | £500 |
| Flush casement windows prices | 940 x 1600 mm | £470 | £570 | £520 |
| Full house uPVC casement | 3 bedroom, 12 windows | £5,000 | £10,00 | £7,500 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||||
Prices typically range from £350- £520 per window depending on the size and material you choose.
If you're looking to upgrade your windows with the casement style, budget around £7,500fornew windows for a 3-bed house.
Sash windows
Sash windows have a classic aesthetic synonymous with period properties. They're typically 50% more expensive than casement windows.
As a guide, expect to pay around:
£520 - £625 for white uPVC sash windows (500x500mm)
£600 - £720for white uPVC sash windows (1,000x500mm)
£625 - £720 for wood effect uPVC sash windows (500x500mm)
£700 - £800 for wood effect uPVC sash windows (1,000x500mm)
Sash windows can be high maintenance. Therefore, it's handy to have an idea of the cost of replacement or repairs:
| Type of repair/replacement | Cost + VAT (Range low - high) | Average cost |
|---|---|---|
| Cost of replacing a sash window | £1,300 | |
| Cost of replacing a sash window with double glazing | £1,300 | |
| Sash window restoration cost | £80 - £488 | £284 |
| Sash window cord repair cost (replacement) | £120 - £160 | £140 |
| Cost of draught proofing sash windows | £200 - £400 | £300 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
Tilt and Turn windows
Tilt and Turn windows are known for offering good ventilation while still being highly secure - they tilt inwards while remaining locked. This style of window is generally around 25% more expensive than casement.
| uPVC tilt and turn windows | Average price | Average fitting cost | Average total cost |
|---|---|---|---|
| 800 x 800 mm | £210 - £820 | £150 - £200 | £490 |
| 1,000 x 800 mm | £250 - £875 | £175 - £250 | £520 |
| 1,000 x 1,000 mm | £280 - £895 | £200 - £275 | £645 |
| 1,200 x 1,200 mm | £300 - £930 | £240 - £300 | £695 |
| Last updated: September 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |||
UPVC Tilt and Turn windowsrange from around £490to £695depending on size and specifications.
In comparison, woodgrain effect Tilt and Turn windowstypically range from £580to £810.
| Woodgrain tilt and turn windows | Average price | Average fitting cost | Average total cost |
|---|---|---|---|
| 800 x 800 mm | £300 - £1,230 | £150 - £200 | £580 |
| 1,000 x 800 mm | £360 - £1,320 | £175 - £250 | £650 |
| 1,000 x 1,000 mm | £410 - £670 | £200 - £275 | £720 |
| 1,200 x 1,200 mm | £450 - £1,400 | £240 - £300 | £810 |
| Last updated: September 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |||
Bay windows
Bay windows create a striking feature from the outside and offer additional space inside. However, they do come at a premium.
With windows at the front and sides, the cost can be as high as 100% more than standard casement windows.
| Item | Range - Low | Range - High | Average cost |
|---|---|---|---|
| Average cost to replace a bay window | - | - | £2,000 |
| Bay windows | |||
| 3-sections | £1,000 | £1,400 | £1,250 |
| 4-sections | £1,500 | £1,800 | £1,650 |
| 5-sections | £1,900 | £2,400 | £2,150 |
| Bow windows | |||
| 3-sections | £1,100 | £1,400 | £1,250 |
| 4-sections | £1,500 | £1,800 | £1,650 |
| 5-sections | £1,900 | £2,300 | £2,100 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |||
To learn more about the different types of bay windows, read our bay window planning guide.
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How much do new windows cost, by frame material?
The material used for the window frames also plays a major role in the overall cost of new windows.
uPVC windows
UPVC is the most cost-effective type of window frame material while being low maintenance and offering great thermal efficiency.
On average, you're looking at around:
Casement windows – £500 - £1,250 per window
Sash windows – £700 - £1,500 per window
Tilt and turn windows – £600 - £1,400 per window
Bay windows – £1,100 - £4,000 per window
If you're curious to understand the price difference between standard white uPVC and a wood effect, these costs will help to give you an idea:
| Type of sash window | Size of window | Average cost |
|---|---|---|
| White uPVC sash window | 500mm x 500mm | £520 - £625 |
| White uPVC sash window | 1000mm x 500mm | £600 - £720 |
| Wood effect uPVC sash window | 500mm x 500mm | £625 - £720 |
| Wood effect uPVC sash window | 1000mm x 500mm | £700 - £800 |
| Last updated: October 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
Coloured uPVC windows
Coloured uPVC windows are becoming increasingly popular with UK homeowners looking for a more contemporary look. However, they do typically come in more expensive than the standard white option:
| Cost provided item | Unit | Range - Low | Range - High | Average cost |
|---|---|---|---|---|
| Grey uPVC casement window (single opener sash) | 1000mm x 500mm | £325 | £375 | £350 |
| Grey uPVC French casement window | 1000mm x 50mm | £475 | £525 | £500 |
| Grey uPVC sliding sash window | 1000mm x 500mm | £700 | £800 | £750 |
| Grey uPVC tilt & turn window | 1000mm x 800mm | £550 | £600 | £575 |
| Install uPVC window frame | Per frame | - | - | £80 |
| Install glass | per pane | - | - | £27.50 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||||
Check out our complete buying guide to uPVC windows for more information.
Composite windows
Composite windows are made from a combination of materials that offer increased strength, durability, and energy efficiency.
| Item | Unit | Low-High | Average |
|---|---|---|---|
| Window Type | |||
| Composite Bay Window | Each | £2,000 - £3,500 | £3,000 |
| Composite Tilt & turn Window | Each | £1,100 - £1,600 | £1,400 |
| Composite Casement Window | Each | £1,000 - £1,500 | £1,300 |
| Composite Sash Window | Each | £1,500 - £2,000 | £1,800 |
| Frame Material | |||
| Timber-aluminium (aluclad) framed window | Each | £1,200 - £3,000 | £1,800 |
| uPVC-aluminium framed window | Each | £1,000 - £2,500 | £1,500 |
| Fibreglass framed window | Each | £1,500 - £3,500 | £2,500 |
| Last updated: September 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |||
Depending on the style of window you choose, expect to pay in the region of £1,300 for a composite casement window, up to around £3,000 for a composite bay window.
How much do composite windows cost?
Composite windows are often said to combine the best qualities of both timber and uPVC. But how much do composite windows cost?
Aluminium
Aluminium windows are durable and sleek, but they come with a more expensive price tag. Expect to pay at least 25% more for aluminium vs uPVC windows.
| Type of window | Cost + VAT (Range low - high) | Average cost |
|---|---|---|
| Cost of aluminium windows | £350 - £600 | £475 |
| Cost of uPVC windows | £250 - £400 | £325 |
| Cost of aluminium sliding windows | £340 - £990 | £665 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
Steel
Steel windows have become synonymous with Crittal windows, known for their slim, contemporary aesthetic. They're strong, secure, and versatile.
| Window type | Unit | Low-High | Average |
|---|---|---|---|
| Steel Bay Window | Each | £2,000 - £3,000 | £2,500 |
| Steel Tilt & turn Window | Each | £1,100 - £1,500 | £1,300 |
| Steel Casement Window | Each | £1,000 - £1,400 | £1,200 |
| Steel Sash Window | Each | £1,500 - £2,000 | £1,800 |
| Last updated: September 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |||
Steel windows range in price from around £1,200 to around £2,500 depending on the window style you choose.
Timber
Wooden window frames add a beautiful, natural look to your home, but expect to pay at least 50% more for wood vs uPVC windows.
| Window type and size | Unit | Price - low | Price - high | Average price |
|---|---|---|---|---|
| Timber casement window 600 x 900 mm | Window and installation | £850 | £1,000 | £925 |
| Timber casement window 1,200 x 1,200 mm | Window and installation | £900 | £1,500 | £1,200 |
| Timber sash window 600 x 900 mm | Window and installation | £1,400 | £1,580 | £1,490 |
| Timber sash window 1,200 x 1,200 mm | Window and installation | £1,500 | £1,800 | £1,650 |
| Last updated: August 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||||
The supply and install of a timber casement window (600x900mm) normally sits around £925.
However, if you're looking at large timber sash windows (1,200x1,200mm), you can expect to pay around £1,650.
Remember, quoted prices are ballpark figures to act as a guide. For an accurate quote for your project, contact a certified local installer.
See the tradespeople we've checked and recommend for your job
How much for new windows, based on the type of glazing?
Finally, the type of glazing you choose will influence the price you are quoted for your new windows. Depending on your requirements in terms of thermal efficiency, soundproofing, and looks, you have several options:
Double glazing
There are a lot of variables when it comes to double glazing. The size and shape of the window will affect how easy the project is, and how much labour is required.
| Type of window | Range - Low | Range - High | Average cost |
|---|---|---|---|
| Casement windows | £500 | £1,250 | £1,000 |
| Sash windows | £700 | £1,500 | £1,200 |
| Sliding windows | £600 | £1,400 | £1,100 |
| Tilt and turn windows | £600 | £1,400 | £1,100 |
| Bay windows | £1,100 | £4,000 | £2,500 |
| Bow windows | £1,500 | £5,000+ | £3,000 |
| Last updated: April 2025 Our costs are ballpark averages - get a local tradesperson to quote now | |||
As you can see, the cost of double glazing can vary quite extensively.
Triple glazing
In order to maximise the insulating qualities of glass, many people are now choosing a third layer of glaze.
| Triple glazing project | Unit | Average cost (incl. installation and VAT) |
|---|---|---|
| Two-bedroom flat | 4 windows | £4,800 |
| Two bedroom terrace | 5 windows | £6,000 |
| Semi-detached house | 8 windows | £9,600 |
| Detached house | 12 glazed windows | £14,400 |
| Triple glazing | 1 window | £1,200 |
| Triple glazing | Per m2 | £1,200 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
The cost of triple glazing might seem extensive, however in time, you will inevitably offset this with savings on your energy bills.
Specialist glazing
Specialists glazing options include items such as soundproof windows, secondary glazing, and self-cleaning glass. Here's what to expect in terms of prices:
Soundproof windows
| Cost provided item | Unit | Average cost |
|---|---|---|
| Soundproof sash windows | 900mm x 500mm | £1,365 |
| 1,800mm x 1,250mm | £2,230 | |
| 1,225mm x 2,480mm | £4,760 | |
| Soundproof casement windows | 1,100mm x 900mm | £895 |
| 1,350mm x 1,200mm | £1,600 | |
| 1,400mm x 2,100mm | £1,860 | |
| Secondary glazing | Per window | £400 |
| Window fitters (team of two) | Per day | £300 |
| Last updated: July 2024 Our costs are ballpark averages - get a local tradesperson to quote now | ||
Self-cleaning glass
| Item | Standard Cost £ |
|---|---|
| Double glazed self clean, Activ (Clear) sealed unit, outer glass and inner glass 4mm. cavity width 4mm 1200mm x 1200mm | £181 |
| 1000×1500 triple glazed self cleaning glass skylight with timber kerb | £700 |
| Standard double window labour fitting | £300 |
| Last updated: May 2024 Our costs are ballpark averages - get a local tradesperson to quote now | |
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Additional costs to budget for when planning for new windows
When estimating the cost of your new windows, it's best to be realistic from the offset to avoid any surprises further down the line.
The cost of installation is to be expected - this should be clearly outlined in your quote.
However, you may not anticipate costs such as scaffolding, waste removal, or 'making good'; ask your installer if this is included in the quote before work begins.
We've outlined some average costs, below, so you have an idea of what to expect.
New windows installation costs
Make sure your window fitter is registered with a competent person scheme such as FENSA or Certass.
They will provide a certificate to prove your new windows have been installed in line with building regulations. This is a legal requirement and is essential for selling your home.
Expect to pay around £600 a day for two installers.
Scaffolding costs
If scaffolding is needed for your new window installation, budget around £1,000 a week to your project cost.
Waste removal
Waste removal may be included in your window fitter's quote, but it's best to ask the question to be sure.
If you do need to hire a skip to get rid of your old windows, budget between £125 - £320 per week, depending on the size required.
Plastering
Finally, ask whether the quote includes making good any plaster or timber around the new window installation.
If not, it's handy to know plasterers tend to charge around £35 to £40 per hour.
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Average cost of new windows for UK homes
Many homeowners want to understand ballpark costs for getting new windows installed based on the size of their property.
The cost of new windows for a 3-bed houseaverages around £7,500. This is based on fitting 12 uPVC casement-style windows.
For an accurate quote, contact a certified installer. They will visit your property, discuss your requirements, and provide a detailed cost breakdown.
Contact or pay a trade through Checkatrade and you’re covered by our 12-month guarantee of up to £1,000*
Find a certified installer for your new windows
New windows are a long-lasting investment in your home; it's crucial to consider all the costs wisely and choose a certified tradesperson for professional installation.
Search your postcode to find experienced and approved installers with Checkatrade.
See the tradespeople we've checked and recommend for your job
See the tradespeople we've checked and recommend for your job