How Much do Soundproof Windows Cost in 2021? | Checkatrade
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Soundproof windows cost guide

Live near a noisy road? Soundproof windows could be the solution. They can help you to reduce noise pollution and make your home more pleasant to live in.

Typically, good quality noise reduction windows cost quite a lot of money. But you can consider it an investment, helping to increase the value and appeal of your home should you ever come to sell it.

In this guide, we’ll take a look at the average cost of soundproof windows, so you can see if it’s the right option for you.

How much do soundproof windows cost?

Cost provided itemUnitAverage cost
Soundproof sash window900mm x 500mm£1,365
Soundproof sash window1,800mm x 1,250mm£2,230
Soundproof sash window1,225mm x 2,480mm£4,760
Soundproof casement window1,100mm x 900mm£895
Soundproof casement window1,350mm x 1,200mm£1,600
Soundproof casement window1,400mm x 2,100mm£1,860
Secondary glazingPer window£400
Window fitters (team of two)Per day£300

There are a number of ways to soundproof your windows, some more expensive than others. The overall soundproof window price will depend on the types, sizes and number of windows, as well as your location.

The cheapest and least disruptive is to install secondary glazing. You won’t need to install new windows or frames, just replace the glass. On average, installing secondary glazing will cost around £400 per window. 

If you have very old frames or it isn’t feasible to install secondary glazing, you’ll need to get new soundproof windows. These can cost from £895 to £1,860 for soundproof casement windows. Soundproof sash windows can be much more expensive, at around £1,365 to £4,760 each.

As well as comparing soundproof window 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. This is also likely to increase the price.

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Types of soundproof windowssoundproof window price

Double glazing soundproofing

If the levels of ambient noise outside your home are currently below 65 dB, double glazing should help you to reduce unwanted sound entering the property.

Triple glazing soundproofing

For homes where ambient noise levels are higher, triple glazing could be a good solution. On average, they offer an additional 4-decibel reduction compared to double glazing.

Secondary glazing

Secondary glazing is where another layer of glass of a different thickness is installed on the window. It also has an insulated air gap, which is what helps to cushion and block unwanted noise. Compared to the cost of installing new soundproof windows, secondary glazing can be much more affordable.

Laminated glass

This is glass which is specially coated in order to block the transfer of sound. The glass is laminated with a PVB plastic coating, which adds another layer to the sound barrier. Laminated glass has the potential to reduce noise levels by up to 35 dB, provided there is a 100mm sound gap and it is used as secondary glazing on an existing single-pane window.

Key takeaways

  • Speak to a professional about your noise problems and they will be able to provide you with the best window soundproofing solution.
  • Secondary glazing is usually the most affordable option, but if your windows are too old it won’t be worth it.
  • Soundproofing your windows is undoubtedly costly – but you should see it as an investment, especially if there is a lot of ambient noise outside your home.

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