If you are pricing up new uPVC windows, you will quickly find that quotes vary wildly, sometimes by thousands of pounds for the same house. This guide sets out realistic price ranges, explains what actually drives the cost, and shows you how to compare quotes fairly. The figures below are typical for Bedfordshire and the wider UK as a guide, not a fixed price list.
As a rough guide, a standard white uPVC casement window supplied and fitted usually costs somewhere between £400 and £900, depending on size and specification. A small top-opening window for a bathroom sits at the lower end, while a large lounge window with several opening sections can push past £1,000.
Style matters a great deal. Casement windows are the most affordable. Tilt and turn designs typically add 10 to 20 per cent, and uPVC sash-style windows, popular on older properties around towns like Dunstable and Leighton Buzzard, can cost 30 to 50 per cent more than an equivalent casement because of the sliding mechanism and extra frame detail.
Most three-bedroom semis have between 8 and 12 windows, so a full replacement in standard white uPVC usually lands between £4,500 and £9,000. A larger detached house with 15 or more windows can reach £10,000 to £15,000, particularly if it includes bays or feature windows.
Bay windows deserve a mention because they surprise people. A three-section uPVC bay typically costs £1,200 to £2,500 fitted, and if the existing bay is structural, it may need load-bearing posts or a reinforced frame, which adds to the price. It is worth asking any installer how they will support a bay before you compare quotes.
Two identical-looking quotes can hide very different specifications, which is where most confusion comes from. The frame colour is a common one: white is the baseline, while woodgrain foils such as anthracite grey or oak usually add 15 to 25 per cent. Glazing is another, as triple glazing typically adds 15 to 20 per cent over double, though for most homes a good A-rated double-glazed unit is perfectly adequate.
Access and the condition of your existing openings also play a part. First-floor windows over a conservatory, older properties with out-of-square brickwork, or homes where the old frames are supporting the brick arch above all take more time and care to fit properly. In conservation areas, which affect parts of some Bedfordshire villages, you may also need specific styles approved before work starts.
Always get quotes itemised window by window, with the glazing rating, frame profile and any extras listed. A cheap headline figure sometimes excludes disposal of old frames, internal trims or making good the plaster, so a like-for-like comparison matters more than the bottom line.
Check that the installer is registered with a competent person scheme such as FENSA or Certass, because replacement windows are covered by Building Regulations and you will need the certificate when you sell your home. Ask what the guarantee covers, and specifically whether it includes hardware and sealed units, not just the frames. Finally, be wary of heavy discounting tactics; a price that drops by half if you sign today was never the real price.
Yes, usually by a clear margin. Aluminium windows typically cost 30 to 50 per cent more than uPVC, and quality timber can be double the price or more, which is why uPVC remains the most popular choice for UK homes.
A well-made, properly installed uPVC window should last 20 to 30 years. The sealed glass units and hardware may need attention sooner, so check that your guarantee covers those parts as well as the frames.
Replacement windows must meet Building Regulations for thermal performance and safety glazing, but you do not need to apply to the council yourself if your installer is FENSA or Certass registered, as they self-certify the work and issue your certificate.
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