COST GUIDES
Soundproof windows: Cost breakdown 2026
Updated 06/26
Is traffic, noisy neighbours, or aircraft noise affecting your home life and sleep? Soundproof windows could be the answer.
Find out how much soundproof windows cost in this handy guide.
Fast Facts
An entry-level soundproofing solution is secondary glazing, at an average cost of around £400 per window
You can expect soundproof windows to be considerably higher in cost than standard windows and secondary glazing
The average cost of soundproof windows starts from £895 per window
On average, window installers charge in the region of £300 per day (team of two)
How much do soundproof windows cost?
| 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: June 2026 Our costs are ballpark averages - get a local tradesperson to quote now | ||
As you can see from the costs above, there are several ways to soundproof your windows, and some are more expensive than others.
Let's get into the costs, starting with the cheapest option – installing secondary glazing.
Cost of soundproof windows: secondary glazing
Many homeowners assume they need to replace their windows entirely, but secondary glazing can often deliver excellent noise reduction at a lower cost.
That's because you won't need to install new windows or frames; you'll just have the additional secondary glazing unit installed.
This entry-level solution is popular for homes near busy roads and for listed buildings where replacing windows isn't an option.
On average, installing secondary glazing will cost around £400 per window
Our secondary glazing cost guide has plenty more details on prices.
As well as comparing prices, you should also pay attention to the sound transmission class (STC) rating. The higher the STC rating, the better the windows are at blocking unwanted noise. However, this is also likely to increase the price.
Soundproof windows cost: triple glazing & specialist glass
If you have old frames or secondary glazing isn't possible, you'll need to get new soundproof windows installed. This is where you'll see a big leap in costs.
Let's look at the price difference between soundproof casement and sash windows based on size:
Soundproof casement windows cost
Soundproof casement window (1,100m x 900mm): Around £895 per window
Soundproof casement window (1,350m x 1,200mm): Around £1,600 per window
Soundproof casement window (1,400m x 2,100mm): Around £1,860 per window
Soundproof sash windows work out more expensive as they're more intricate to build:
Soundproof sash windows cost
Soundproof sash windows (900mm x 500mm): Around £1,365 per window
Soundproof sash windows (1,800mm x 1,250mm): Around £2,230 per window
Soundproof sash windows (1,225mm x 2,480mm): Around £4,760 per window
Don't know your sash window from a casement window? We don't blame you. There are as many types of windows as there are types of houses. Our expert advice guide to types of windows helps to clear up any confusion.
Why are soundproof windows so expensive?
As you can see, soundproof windows don't come cheap.
But here's the thing to know. With soundproof windows, you're paying for:
One or two panes of thick acoustic glass, laminated with a PVB (polyvinyl butyral), which enhances sound-absorbing properties
Often, an additional pane of standard glass
A larger-than-normal cavity between panes to disrupt sound waves (often 12mm-20mm+)
Specialist window construction
Soundproof windows labour costs
In addition to the cost of your soundproof window, you'll need to factor in installation costs.
The good news is that the labour costs for window fitting are very reasonable:
On average, window installers charge in the region of £300 per day (team of two)
Just looking to install one soundproofing window in a living room or bedroom? For smaller jobs, a glazier typically charges in the region of £25 per hour
However, prices may vary depending on where you live in the country. For instance, London and parts of the South East might be higher due to demand.
That's why we always recommend contacting a window fitter directly to get an exact quote.
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Soundproof windows cost calculator
Not quite ready to contact a tradesperson? Why not try our cost calculator tool for an instant estimate based on the size and number of windows you need fitting?
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Factors affecting your soundproof window price
Several factors will affect your total soundproof window cost:
Size and amount of windows: Costs for projects involving multiple windows will soon add up
Type of windows: As explored, soundproof sash windows will work out a lot more than secondary glazing
Glazing specification: Thicker glass, acoustic laminated glass and wider glazing gaps all increase costs
Access: Hard-to-reach windows will increase the labour time
Frame type: Prices for timber, uPVC and aluminium frames vary
Waste removal (for new installation): Don't forget your old windows will need to be disposed of
Hidden soundproof window costs to watch out for
While not necessarily 'hidden' costs, there are some additional factors to be aware of:
Location: Installation costs may be higher in London and parts of the south east, where demand is higher
Making good: Internal plasterwork, trims or decorating may be needed after installation
Planning requirements: If you live in a listed building or conservation area, additional permissions may be required
For an exact quote, contact a glazing specialist near you.
Find glaziers near you
Are costs mounting up more than you hoped? Consider soundproofing only the windows facing the main noise source, or prioritise key rooms such as bedrooms where peace and quiet matter most.
Why might you need soundproofing windows?
Reasons for investing in soundproofing windows include:
Live in a busy city or town centre
Have noisy neighbours
Are located near a flight path or a busy road
Live near a railway or underground station
Work from home and need a quieter space
Looking for other ways to soundproof your home? Our soundproofing guide is a handy read.
Is installing soundproof windows worth it?
Surprised by the cost of soundproof windows? You won't be the first.
But for many homeowners, it's a worthwhile, long-term investment. Here's why:
Creates a more peaceful environment (for work, relaxing and sleep)
Increases the value of your home
Improves energy efficiency
Noticed companies mentioning both acoustic double glazing and soundproof windows? It's confusing, we get it. Acoustic double glazing is a type of window that uses specialist glass and wider gaps between panes. Soundproof windows is simply the broader term for a range of noise-reduction windows.
What should your soundproofing window installation quote include?
Before hiring a glazing specialist, make sure you understand exactly what's included in the quote, so there's no unexpected costs later on.
Your quote should clearly outline:
Initial inspection to recommend the type of soundproofing solution being installed (acoustic glazing or secondary glazing?)
The number and size of windows included (if they are sourcing windows for you)
Labour and installation costs
Removal and disposal of old windows (if needed)
Any access equipment required, such as scaffolding (in rare cases)
Making good of internal and external finishes after installation
Guarantees or warranties on products and workmanship
VAT, where applicable
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Soundproof windows cost checklist
Wondering if you need energy efficient windows? Whatever your need, from double glazing repairs, to finding an installer, we've got you covered. Even if you can't choose between window types.
FAQs
What's the difference between acoustic double glazing and soundproof windows?
Acoustic double glazing is a type of soundproof window designed to reduce noise using specialist glass and wider gaps between panes. Soundproof windows is a broader term that covers a range of noise-reduction solutions, including acoustic double glazing, secondary glazing and specialist acoustic window systems.
Do soundproof windows actually work?
Yes. Soundproof windows can significantly reduce external noise from traffic, aircraft and neighbours. The amount of noise reduction will depend on the glazing type, window design and installation quality.
Can windows be 100% soundproof?
No window can completely eliminate all external noise. However, high-quality acoustic glazing and secondary glazing can dramatically reduce the amount of sound entering your home.
How can I soundproof my windows cheaply?
Secondary glazing, acoustic window film and draught-proofing seals are some of the most affordable ways to reduce noise without replacing your existing windows.
Can I soundproof windows without replacing them?
Yes. Secondary glazing, acoustic curtains and sealing gaps around window frames can all help reduce noise without the need for full window replacement.
Does soundproof foam work on windows?
Acoustic foam is designed to reduce echoes within a room rather than block external noise. Secondary glazing or acoustic glass are usually much more effective solutions.
Can car windows be soundproof?
Acoustic laminated glass and specialist soundproofing materials in vehicles can help reduce road and wind noise, although it's not possible to make a car completely soundproof.
What are the different types of soundproof windows?
Double glazing: The most affordable option, offering good noise reduction and improved energy efficiency for homes exposed to moderate levels of noise
Triple glazing: Features three panes of glass for enhanced insulation and slightly better soundproofing than standard double glazing
Secondary glazing: Adds an extra pane of glass to your existing window, creating a larger air gap that can significantly reduce external noise at a lower cost than full window replacement
Laminated acoustic glass: Uses a specialist sound-dampening layer between glass panes to help block and absorb noise, making it one of the most effective soundproofing solutions available
A glazing specialist can recommend the most suitable solution based on your home's noise levels and budget.
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