Sash Window Prices

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Average Sash window cost

The regular cost of sash windows is around £400-600 per window, so you're looking at about £2,000 to install 4 sash windows in a flat, and up to and exceeding £5,000 for replacing all the windows in a standard-sized home.

Average price per Sash window job in 2025

Avg. price low

Avg. price low
£1,233

Avg. price

Avg. price
£3,499

Avg. price high

Avg. price high
£6,105

£6700

£5025

£3350

£1675

£0

Prices based on actual Sash window costs for your area, as reported by local LeadsDoWork members.

Sash window installation cost in your area 2025

Labour cost £1,400
Material cost £700
Waste removal £100
Time frame: 1-2 days

Advantages for Sash window

  • Low cost vs other materials such as wood and aluminium
  • Available in a wide range of designs and styles
  • A good insulator that is highly energy efficient
  • High security to make your home more secure

Disadvantages for Sash window

  • Does not use natural materials so not as environmentally friendly
  • Can discolour if not cleaned very regularly
  • Adds less value to your home than wooden windows

Sash window Manufacturers

Sash window FAQs

What is double glazing?

If a window is double glazed, it has two panes of glass that have a space between them containing argon gas. The gas works as an insulator, keeping heat inside the house as well as reducing noise. It also strengthens the window.

How to fit a double glazed window?

Did you just purchase a double glazed window and confused about how to have it installed? Fitting the window yourself can be quite easy with the help of this step by step guide. However, if you lack proper training or experience, we’d recommend you reach out to a trustworthy professional who can guarantee the best results for help. That said, now let’s take a look at the process.

• Remove the old windows by detaching the old beading and glass window safely. Then make some interval cuts using a hand saw before using a crowbar to pry it out.

• Cut the external double glazed window seal. Once done, take a measurement of the window area’s width once empty. Then transfer the measurement to the window sil to face outside and cut using a handsaw.

• Seal the window sil. Add a bead of clear silicone along both inside lip as well as the centre to seal the sil.

• Screw the double glazed window to the sil. Position the window on the top of the lipped section that was siliconed. Then pre-drill them together and screw in three places. You should make sure the screws do not go totally to the sil’s bottom.

• Install the double glazed window. After successfully screwing the double glazed window to the sil, you can now fit in the double glazing. Make use of packers to make sure it’s even in the slot.

• Screw the uPVC window to the wall. If you’re happy and satisfied with the position of the window, you can then pre-drill through the frame of the window and the brick wall. Once done, simply screw it in place using masonry screws or Spax screw as they do not require crawl plugs in bricks.

• Seal around the window. To do this, simply fill any gaps with expanding foam, wipe out the excess and seal with silicone.

What is the Window Energy Rating (WER)?

The energy efficiency of windows is measured using ratings, varying from A, the most efficient, to G, the least efficient. This scheme is run by the British Fenestration Council (BFRC). To comply with Building Regulations you’ll need windows of energy efficiency at least level C.

Do I need to stay at home while my windows are being replaced?

Most installers will not need you to be at home while they are fitting your windows. It is a good idea to be present though, just in case they have any questions for you and perhaps for your own peace of mind. If you cannot be there, you will need to arrange access to the property and/or agree securing the property at the end of the day.

What happens to my old windows?

After fitting your new windows, your installer should take away and dispose of your old windows. If you want to keep them, just let your installer know before they start work. The UPVC frames are melted down and used on the unseen parts of new windows. Aluminium frames are re-smelted and wooden are broken down and used as chipboard.

What if my home isn’t suitable for double glazing?

Some properties are unable to have double glazing, especially those in conservation areas or listed buildings. To counter this problem and still benefit from a warmer home and cheaper bills, secondary glazing is an option. Secondary glazing is a second pane fitted inside your original window. Secondary glazing will still save you around £105 yearly.

Are A-rated windows worthwhile?

On the grand scale of things there isn’t a huge difference between B-rated windows and A-rated windows. Consumer watchdog Which? have calculated an extra 6.5% would be saved on energy bills with A rather than B rated panes. Be aware that A rated windows are slightly more expensive, however.

What is uPVC?

uPVC is unplasticised polyvinyl chloride. It is a favourite amongst homeowners and manufacturers for its cheap production cost and excellent benefits. uPVC is used for window frames, conservatories and doors. In fact, uPVC can be three times cheaper than wooden frames and is also the most energy efficient option.As well as this, uPVC is now available in a range of colours other than the typically seen bright white finish. It can also be recycled, is durable and resistant to changing weather conditions.

Sash Window Restoration, Rennovation and Draught-proofing by Heritage Sash Window Specialists

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WFS Anglia

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Here at WFS Anglia Ltd, we have built ourselves a fantastic reputation throughout Cambridge, Northam...

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Colin S., PE14
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Windows | uPVC in Wisbech

Straight forward no pressure quotation took 1/2 hour. Fitted within a few weeks.very...

ECO WARM HOMES SW

Based: in Rotherham, EX17

We are a Home improvements company specialising in replacement windows doors and conservatory instal...

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Vaughan N., EX39
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Windows | uPVC in Bideford

Very polite, no pressure

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Based: in Doncaster, DN8

Secured homes is based in Doncaster and have 11 positive reviews

Latest review

Nigel L., BD10
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The Window Company have been trading since 2001 in the East Midlands area, offering a bespoke servic...

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Denise M., S80
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A Rated Home Improvements

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Lesley H., CF36
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Based: in Neath, SA10

Affordable Quality Windows is based in Neath and have 6 positive reviews

Latest review

Lesley H., CF36
14th March 2024

Windows | uPVC in Porthcawl

Already had three engagements so declined appointment .

A One Home Improvements South West

Based: in Swansea, SA5

Over 35 years’ experience, we offer the complete package from design to installation & 10 years be...

Latest review

Lesley H., CF36
14th March 2024

Windows | uPVC in Porthcawl

Really positive appointment fully explained everything and the products .. seemed to...

Barriertherm UK

Based: in Middlesbrough, TS1

We are a family run company run on family values we provide a personal professional service offering...

Latest review

Shane W., NE9
20th February 2024

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ALL Weather Roofline

Based: in Doncaster, DN7

AWR have years of experience in creating stunning home improvement products, carefully crafted right...

Latest review

David M., LN2
12th October 2023

Windows | uPVC in Lincoln

Stuart was really open and honest. Nice chap, no hard sell.

Britelite Windows

Based: in Maidstone, ME15

We fit high quality double glazing and the next generation triple glazing, using only the best mater...

Latest review

Mazdak A., SM4
24th September 2023

Windows | uPVC in Morden

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Rated Local window installers

Britelite Windows Ltd

156 review(s)
Based: in Maidstone, ME15 9XY

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Conservatories & Windows Direct

2 review(s)
Based: in Cannock, WS11 0BW

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WFS Anglia LTD

60 review(s)
Based: in Peterborough, PE2 9PS

Here at WFS Anglia Ltd, we have built ourselves a fantastic reputation throughout Cambridge, Northamptonshire, Peterborough, Milton Keynes, Buckinghamshire and surrounding areas. This is based upon our perfect harmony between high quality workmanship...

Crystal Windows and Doors Ltd

64 review(s)
Based: in Romford, RM7 7PN

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Omega Lifestyle LTD

56 review(s)
Based: in Peterborough, PE7 3EL

Omega Lifestyle prides itself on providing a high quality of customer service from the initial order right through to aftersales. Our professional customer service team make the whole process of buying a new conservatory, windows, doors and patios/dr...

The Window Company

13 review(s)
Based: in Nottingham, NG14 5FP

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Verdi Home Improvements Limited

82 review(s)
Based: in Leicester, LE8 4GZ

Verdi Home Improvements We specialise in transforming properties like yours into secure, elegant and energy efficient homes. We achieve this by using expert installers to fit British made windows and doors of immense quality. "Your home, our Passi...

A Rated Home Improvements Limited

26 review(s)
Based: in Swansea, SA4 9WN

Founded in 2010 in Port Talbot, but now based in Gorseinon, A-Rated Home Improvements install double glazing, uPVC and Aluminium windows, doors and conservatories to a professional and very high standard. With almost 10 years’ experience operating ...

Kent Glazing Limited

43 review(s)
Based: in Gillingham, ME7 3NE

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A One Home Improvements South West Ltd

1 review(s)
Based: in Swansea, SA5 4JB

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