Replacing windows can improve your home's energy efficiency, security, and aesthetic appeal. The cost of new windows in 2025 is primarily determined by the material and style you choose.
uPVC windows are the most popular and affordable option in the UK. For a standard casement window, you can expect to pay between £300 and £600 per window, including installation. Wooden windows offer a more traditional look but come at a higher price, typically ranging from £700 to £1,500 per window. Aluminium windows provide a sleek, modern aesthetic and are priced similarly to wood, at around £600 to £1,400 per window.
The style of the window also affects the cost. A simple casement window is the cheapest, while a sash window or a bay window will be significantly more expensive due to their complex construction and installation. The energy rating of the glass is another factor; triple glazing will cost more than standard double glazing but will offer better thermal performance.
For a whole-house replacement on a typical 3-bedroom semi-detached property with 8-10 windows, you might budget between £4,000 and £7,000 for uPVC, and £8,000 to £15,000 for wood or aluminium. Always use a FENSA or CERTASS certified installer to ensure your new windows comply with building regulations.