Double Glazed Sash Windows – Prices and Costs Guide

Double Glazed Sash Windows Cost Summary
Price Range = £167 to £524
Average Cost = £332
Cheapest Price = £167

Related Guides: Double Glazing Prices and Cost Guide

Unlike cheaper uPVC frames, sash windows offer an authentic look for older homes and these days they can still be manufactured to reduce your energy bills. Older sash windows often consist of only a single pane of glass causing draughts and resulting in higher energy bills. Fortunately, however, you can save money and keep warm with new double-glazed sash windows. Made with frames styled to suit old Georgian and Victorian designs, they still offer all the insulation and energy-efficient qualities of cheaper uPVC window models.

New double-glazed sash windows will vary in price according to the size of your windows, how many you need installed, what type of material you opt for and the final style you choose, but the following table lists some average costs for three of the more popular kinds of double glazed sash window:

Measurements (mm) u-PVC White (£) u-PVC Cream/Natural (£) Oak Timber (£)
600 x 1000




1100 x 2950





Although the prices listed above only include the smallest and largest double-glazed sash window options available, the cost estimates should help you to work out a rough guess of any measurements in-between. It is important to remember, however, that this is just a table of average quotes, and for a more accurate guide to pricing you should get in touch with a professional window installer, who will be able to carefully calculate costs according to your chosen design and size of your new sash window.

*Sources: Energy Saving Trust says:

Can you tell me please for replacement double glazed sash windows on oak finish do they come with sills and are they taken right back to the brickwork? Thank you

ablyth says:

Hi, please fill in this form and a window specialist in your local area will be in touch to discuss your project in more detail and provide a free, no-obligation quote.

N. Thomas says:

Please can you say what year these guide prices relate to and from what geographic location? I’d be very interested to know where i could get an oak double glazed sash window 1100x 2950 for £524.

mjackson says:

Hi and thanks for posting,

This article was last updated in December 2013 with costs based on an average of the whole of the UK (unless stated otherwise in the article).

We are always updating and improving our articles and cost guides therefore your feedback has been forwarded over to our content team for future reference.

Should you require quotes regarding windows, please fill in our online form and we will aim to match your request with up to 4 local companies who will each contact you in order to arrange a free quote.

Thanks again.

Mark @ ServiceMagic

Hello all,

My girlfriend and I have moved into a 100 year old victorian house and there is some single pane sash bay windows in the living room that are typically drafty/cold…

We are keen to keep the period features in the house and would like to consider our options to update the glass to double glazed.

Please can someone be in touch to quote for the works?


mjackson says:

Hi Leigh,

Thanks for your post.

Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote.

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