New Windows Cost UK 2026
uPVC, aluminium and timber window prices including double and triple glazing options.
Replacing windows is one of the best energy efficiency upgrades for a UK home. Modern double or triple glazed windows reduce heat loss, cut energy bills, and make your home quieter and more comfortable. But the cost depends heavily on the material, glazing type, and number of windows.
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uPVC vs aluminium vs timber
uPVC is by far the most popular choice in UK homes, making up around 85% of all window replacements. It is the cheapest, requires virtually no maintenance, and comes in a wide range of colours and finishes including woodgrain effects. Aluminium frames are slimmer, stronger, and more modern looking, making them popular for contemporary extensions and bifold doors. Timber is the premium option, preferred for period properties and conservation areas where planning restrictions may require natural materials.
Installation costs
Window fitting is typically included in the per-window price when buying from a window company. If buying windows separately and hiring a fitter, expect to pay £100 to £200 per window for installation. Scaffolding for upper floor windows adds £200 to £600 depending on the height and number of windows.
All replacement windows in the UK must comply with Building Regulations. The installer must either be registered with FENSA or Certass (self-certification schemes) or you need to obtain a building regulations certificate from your local council, which adds £200 to £400.
Stop guessing. Get an actual estimate.
Our AI estimator gives you a full materials and labour breakdown for your specific project in under 60 seconds. Free, no signup needed.