Black Knight Secondary Glazing
Black Knight Secondary Glazing

Secondary Window Prices

How much are secondary window prices?

When it comes to secondary window prices there is no simple answer to how much you should need to pay. As you would expect all windows are different and the variety of sizes, shapes and designs is almost infinite. All our products are made-to-measure to ensure a perfect fit and each project needs to be costed dependant on which issues such as heat loss, draughts, security or noise that are to be dealt with.


To get an accurate secondary window cost please fill in the contact form below.


We will always price-match any genuine, written, like-for-like quotation and promise to save you at least 5% off the total cost of your secondary glazing.

If you would like to take advantage of this offer, please email a copy of your quote to us and we will contact you to confirm both the secondary window prices and our price-match quotation. 

If you can, please give us details of what you would like an estimate for in the comments box.


For each secondary window that you require please provide the following information.


  • Frame colour (the standard colour is white)





  • whether any of the windows are in a bay 


Otherwise we will e-mail you a form to fill in the details of your secondary window requirements to enable us to quote for you.

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Secondary window prices will vary depending on a number of the factors indicated above.


For an accurate cost estimate and price we will need to visit your property and assess the actual situation for:



We will then send you a fully itemised schedule of the cost -  our secondary window prices are valid for 30 days.


We will never sell or pass your personal details to anybody else.


Where we can supply & install a secondary window

We supply and install secondary glazing in Bedfordshire, Berkshire, Buckinghamshire, Cambridgeshire, Derbyshire, Greater London, Hertfordshire, Leicestershire, London, Middlesex, Northamptonshire, Nottinghamshire, Oxfordshire, Rutland, Surrey & Warwickshire.


If you live in any other area of the UK please refer here

We are a friendly and experienced independent company and do not believe in "pushy" sales tactics which some other companies employ. Depending on whether you are looking to install a secondary window because of heat loss, draughts or thermal insulation issues, noise reduction or to achieve better security the options are extensive and you can achieve an affordable solution to your problem.


We are always happy to offer a no-obligation inspection of your windows in the areas where we supply and install to offer best advice on the possible solutions. We will then send you a full written estimate detailing exactly what we propose and give you as much time as you need to come to an informed decision about how to proceed. 

If you decide to accept our quotation then our surveyor will visit you at a convenient time to take final sizes for manufacture of your products. When our installers visit you we will ensure your property & content are fully protected during the work, they will clean up after themselves and give you a full demonstration of how to operate and look after your new purchase.


Only when you are fully satisfied with the work will we ask you for payment.

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