The number of new windows

Simply put, the more windows you require, the more you will have to pay. With that said, the individual window cost goes down in accordance with how many you buy. So, the more you order, the more you save. By taking advantage of one of our fantastic finance options, you can also spread the cost of new windows out over a period of time that better suits you.

View our finance options
Double Glazing
Timber Casement windows

The replacement window material

Another factor that has an effect on window costs is the material that they’re constructed from. Generally, but not always, uPVC windows tend to be more cost-effective than the other materials. This is not because of a lack of quality but because they are cheaper to manufacture than timber and aluminium windows.

Why timber windows are an excellent investment

The style of new window

Your chosen replacement window style will also determine its cost. When buying from T&K, there’s plenty of choices when it comes to the window style too. From versatile casement windows to timeless vertical sliders and practical tilt & turn windows, we’ve got a style of replacement windows to suit any homes in and around the Northamptonshire area.

View T&K's range of window styles
Sliding sash double glazing
TKHI staff

The standard of the double glazing installer

The old adage ‘you get what you pay for’ is very true when it comes double glazing and window installers. If a double glazing company offers to install your windows on the cheap without any reasonable justification for the low price, such as a deal they’re currently running, their credentials as a trusted local window installer should be brought into question.

A quality window installation from a Which? Top Trusted Trader like ourselves will also last much longer than a shoddy one, so will constitute far better long-term value. Why not check out our Checkatrade reviews for further proof of the fantastic service we offer?

Why you should pick a local company over the nationals

Additional factors affecting the cost of new windows

In addition to the aforementioned factors, the price of new windows is affected by:

The glazing – opting for triple glazing instead of double will improve security and soundproofing, although it does tend to cost more.

The glass they’re fitted with – new windows are available with a variety of glass options, which includes acoustic glass and decorative glass to suit individual requirements.

Colour/finish – there is a huge range of window colour/finish options, including smooth, wood grain and matte finishes, all of which have an effect on their price.

Window furniture – you might want to fit your windows with monkey tail handles, trickle vents or another form of window furniture.

Locking hardware – windows can be fitted with multipoint locks, window restrictors and other forms of window locks and hardware.

Check out our windows buying guide
White Tilt & Turn

Does planning permission have an effect on the cost of windows?

Most of the time planning permission is not required for new window installations, especially if the new ones are similar in appearance to those that are being replaced. However, if planning permission does have to be obtained, it can have an effect on how much new windows cost.

What do you need planning permission for?


Fabulous from start to finish

Fabulous from start to finish. I would have no hesitation recommending your organisation. Thank you […] for their professionalism.



couldn’t have asked for more

Throughout the process, he couldn’t have asked for more. All the staff have been helpful and friendly, and the finished installation is fantastic.



Prompt & professional

I’m very pleased with the work, quality and efficiency. A very good top job carried out.



I would recommend T&K to anyone!

I would recommend T&K to anyone! They have done a fabulous job installing a new front door and canopy. First class job!



Professional, courteous and friendly

I had dealt with T&K before and had full confidence in their work and company values. The work was completed on time, at the agreed price and in a professional manner. The fitters were professional, friendly, respectful and tidy.



excellent company

We have had all our doors & windows replaced by T & K, excellent company.



Fantastic company

Fantastic company that designed the perfect conservatory for my home and at a very cheap price, I would recommend them to anyone.



Thank you for my recent installation

Thank you for my recent installation. I am delighted with the result, and would recommend your organisation without hesitation.


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With full accreditation from the appropriate regulating bodies, you can feel assured of the quality that’s on offer.

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Serving homeowners across Northamptonshire

During our tenure as traders, we’ve provided bespoke home improvement solutions across the Northamptonshire area and beyond. This includes areas in counties like Oxfordshire and Buckinghamshire. We've installed home improvements in places such as Corby, Northampton, Bedford, Kettering, Milton Keynes, Cambridge, Aylesbury, Oxford, Rugby, Bicester, Luton, Market Harborough & Banbury.

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