How Much Do uPVC Windows Cost?

Across the UK, a standard uPVC casement window typically falls somewhere between roughly £350 and £800 supplied and fitted, depending on size, glazing specification and region. Larger windows, bay or bow configurations, and coloured foils push costs higher. These figures are indicative only — every property and specification is different, so a fixed written quote from a free home survey is the only reliable way to know your actual cost. Avoid comparing headline numbers from adverts, as they rarely include installation, disposal of old frames or making good internally.

Double glazing with standard argon-filled units sits at the lower end of the market, while triple glazing, acoustic laminated glass or specialist coatings such as self-cleaning or solar control glass add to the overall cost. The trade-off is usually worthwhile in noisy or north-facing rooms, or where energy bills are a concern. A reputable installer should explain the U-value and specification options clearly rather than simply upselling, and should be able to justify any premium in terms of comfort, noise reduction or running costs over the life of the window.

White uPVC is generally the most economical finish, while foiled colours such as anthracite grey, black or woodgrain typically add a percentage premium because of the additional lamination process. Flush sash and heritage-style windows, which mimic timber, also cost more than standard casements due to more complex manufacturing. Hardware upgrades, such as heritage handles or enhanced locking, are usually modest additions but worth itemising on your quote so you can compare like-for-like between installers.

Replacing a whole house of windows in one project is usually more cost-effective per window than doing them individually, as scaffolding, waste disposal and labour are shared across the job. Access difficulties, such as upper-floor bay windows or restricted rear access, can increase labour costs. Older properties may also need remedial brickwork or lintel repairs once old frames are removed, which a thorough survey should flag in advance rather than as a surprise on installation day.

Always ask whether a quote includes removal and disposal of old frames, external finishing such as render repair, internal decoration around the reveal, trickle vents required by building regulations, and FENSA or CERTASS certification. Some cheaper quotes exclude these items, only for them to appear as extras later. A transparent, fixed written quote should list everything included so there are no surprises on the day of installation.

Because every property differs in size, access and specification, online calculators can only ever give a rough guide. The most reliable way to understand your actual cost is a free, no-obligation home survey, followed by a fixed written quote that itemises materials, labour, glazing specification and any building work required. This also gives you the chance to ask about lead times, guarantees and finance options before committing.