uPVC (unplasticised polyvinyl chloride) is fitted in the majority of UK homes today. It costs less than aluminium or timber, requires almost no upkeep, and a quality unit lasts 20 to 25 years. Fitted prices run £400 to £1,000 per window, with a standard A-rated casement coming in at around £650. You can price your own project in the uPVC window calculator, or read on to understand exactly what you are buying and whether uPVC is the right material for your home, or let our material classifier suggest one from your priorities.
What is uPVC?
uPVC stands for unplasticised polyvinyl chloride. Standard PVC is softened with chemical plasticisers to make it flexible; remove those plasticisers and you get a rigid, strong material capable of bearing the weight of a window frame without creeping or distorting over time. That rigidity is the key property: uPVC holds its shape decade after decade, keeps the double-glazing unit sealed, and maintains the draught-proofing compression around the frame. The name is sometimes written as UPVC (without the lower-case u), but both refer to the same material.
uPVC became the dominant UK window frame material during the 1980s and 1990s, as householders replaced single-glazed timber windows in large numbers. Today it accounts for the overwhelming majority of domestic window replacements. The technology has improved significantly since those early days: modern uPVC is UV-stabilised to resist fading and yellowing, many profiles include galvanised steel or aluminium reinforcement within the chamber walls for extra stiffness on wider spans, and the hardware (handles, hinges, multipoint locks) is far more durable than first-generation fittings.
Colour options have broadened considerably. White remains by far the most popular choice, but woodgrain foil finishes in anthracite grey, black, rosewood and Irish oak are now widely available. These let uPVC mimic the appearance of painted timber at a fraction of the long-term maintenance cost. The foil is factory-bonded and does not peel in the way a poorly applied exterior paint can on real timber. If you want the warmth of a timber look without the upkeep commitment, a foil-finished uPVC window is a practical middle ground well worth considering.
uPVC window costs in 2026
The style you choose has a bigger effect on price than most buyers expect. A fixed picture window with no opening mechanism can come in under £250 fitted, while a full bay structure can exceed £3,000. The table below covers the main uPVC window styles at fully fitted 2026 prices, including removal of the old window, sealing and the FENSA certificate. Our casement windows guide covers the most popular style in depth if you want to compare side-hung, top-hung and tilt-and-turn mechanisms before deciding.
| Window style | uPVC fitted |
|---|---|
| Casement | £400–£1,000 |
| Sash | £600–£1,500 |
| Tilt and turn | £500–£1,200 |
| Bay (per bay) | £1,100–£3,000 |
| Picture (fixed) | £220–£440 |
Source: DGCC 2026 dataset (uPVC fitted ranges), cross-checked against Checkatrade and FMB.
Within any style, price shifts with glass area, glazing specification (standard A-rated double versus triple glazing) and the installer's location. London and the South East typically sit at the upper end of each range; the Midlands and North come in lower. Getting at least three quotes from FENSA-registered installers remains the single most reliable way to keep your total bill within the lower half of any range. Our guide to avoiding overcharging explains what a competitive quote should look like line by line.
For whole-project estimates, the cost by house size guide shows how quickly the total scales once you are replacing every window in a semi-detached or end-terrace. Most three-bedroom semis need eight to twelve windows, so even a modest saving per unit adds up across the job.
The casement at around £650 is the benchmark I use when quoting a standard job. If an installer is charging significantly more for a plain casement in a regular opening, ask them to break the cost down line by line. Labour, glass unit, frame, hardware and certificate should all be itemised. If they cannot do that, keep looking.
Tom Bradley, FENSA-registered installer
Which homes uPVC suits
Best Buy uPVC is the best-value choice for the majority of modern and post-war UK homes. Semis, terraces, bungalows and new builds all take uPVC well because their proportions and detailing were designed around rectangular, flush-fit windows rather than the deep-set reveals and intricate glazing bars of pre-war architecture. Post-war local-authority housing in particular was built with standardised opening sizes that suit modern uPVC frames perfectly, and the slim white profile sits cleanly in those brick and concrete reveals.
New-build developers almost universally specify uPVC as the default frame material because it meets Part L energy requirements comfortably, needs no maintenance for the first occupier, and keeps build costs predictable. If you are moving into a recently built home and wondering what frame material was fitted, uPVC is by far the most likely answer.
Where uPVC sits less naturally is on Victorian and Edwardian frontages where original sash windows are integral to the character of the streetscape, and in designated conservation areas where the local planning authority requires timber or high-quality timber-effect frames. Our uPVC versus timber comparison sets out the trade-offs in detail, including what to do when you want the look of timber but cannot commit to the maintenance schedule.
Lifespan and maintenance
A properly installed uPVC window from a reputable manufacturer will last 20 to 25 years. That is not dramatically shorter than aluminium (which tends to run 25 to 30 years) and is vastly longer than the single-glazed timber windows most uPVC installations replace. In practice, the sealed double-glazing unit between the panes may show some fogging after 15 to 20 years as the edge seal degrades, but the frame itself will still be sound: only the unit needs replacing at that point, not the whole window.
Maintenance requirements are minimal by design. The frame will not rot, rust or need repainting. Cleaning with warm soapy water and a soft cloth once or twice a year keeps the frame looking its best. A drop of light oil on the hinges and locking points every two or three years prevents stiffening. That is genuinely all that is required across a 20-plus year lifespan. There is no sandpaper, no primer, no topcoat and no annual window-painting weekend to schedule.
By comparison, timber frames need repainting or re-staining every 8 to 10 years to protect the wood from moisture ingress. Over a 25-year period that is two or three full paint cycles, with associated labour, possible scaffolding for upper floors, and the disruption of having tradespeople on site. Our timber windows guide sets this out in full if you are weighing total cost of ownership rather than purchase price alone. For a straightforward comparison of how lifespan stacks up across all mainstream materials, see our window lifespan guide.
I have taken out uPVC windows installed in the 1990s that were still functioning perfectly, just looking a bit dated. The technology today is better in every dimension: tighter seal, better insulation, more durable hardware. A good uPVC unit fitted now will still be doing its job when your children are old enough to worry about their own window bills.
Tom Bradley, FENSA-registered installer
uPVC versus aluminium and timber
The two main alternatives to uPVC are aluminium and timber. Both have genuine merits in the right context, but for the typical UK home the price premium they carry is hard to justify on performance grounds alone.
Aluminium offers slimmer sight lines (the visible frame strip around each pane), an extremely long service life, and a contemporary aesthetic well suited to modern architectural styles. It is available in any RAL colour and is increasingly specified on architect-led new builds and high-specification renovations. However, aluminium windows run roughly 30 to 40 per cent more than uPVC equivalents. For a three-bedroom semi with ten windows, that difference can amount to several thousand pounds on the project total. Our uPVC versus aluminium comparison examines where the premium is and is not worth paying, and the aluminium windows guide covers specification and colour options in detail.
Timber commands an even larger premium, running roughly 60 to 110 per cent more than uPVC across the same styles. That figure reflects the raw material cost, the skilled joinery involved, and the protective factory coatings applied before despatch. Timber is the correct choice for listed buildings, designated conservation areas, and heritage restoration projects where appearance and planning compliance take precedence over whole-life cost. Outside those contexts, the maintenance commitment and higher purchase price make timber a hard sell for most homeowners. The timber windows complete guide is worth reading in full before committing to any premium frame material.
On energy performance, the frame material is only one variable. The glazing specification (A-rated double versus triple glazing) and the quality of the installation seal have a larger practical effect on U-value than the choice between uPVC and aluminium. A well-installed, A-rated uPVC window achieves a U-value of 1.4 W/m²K or better, which meets and typically exceeds the Part L building regulations requirement. Our U-values guide explains what these numbers mean in practice and which specification to request when ordering.
The verdict on uPVC windows
Best Buy For most UK homes, uPVC is the right answer. It delivers the lowest purchase price, the lowest maintenance burden and a lifespan long enough that the whole-life cost per year is genuinely competitive with more expensive materials. An A-rated uPVC casement at around £650 fitted is the cheapest entry point into proper energy-efficient double glazing and is the specification we recommend as the sensible default for semis, terraces, bungalows, post-war housing and new builds across the country.
The clear exceptions are conservation areas and listed buildings where timber is required by planning condition, and high-specification contemporary builds where slim aluminium sight lines genuinely matter to the design. If neither applies to you, uPVC will serve you well for 20 or more years at the best price available. All the major material and style comparisons are collected in our guides section. When you are ready to price the job, the uPVC window calculator turns your window count into a 2026 range in seconds.
Frequently asked questions
A fitted uPVC window costs £400 to £1,000 in 2026. A standard casement is around £650 typical. Sash styles run £600 to £1,500, tilt and turn £500 to £1,200, and a bay window £1,100 to £3,000 per bay.
A well-made uPVC window lasts 20 to 25 years with almost no maintenance beyond an occasional wipe. The frame does not rot, rust or need painting, which gives uPVC strong whole-life value compared with timber.
uPVC stands for unplasticised polyvinyl chloride. Removing the plasticisers from standard PVC produces a rigid, load-bearing material that holds its shape over decades and is well suited to window frames.
Usually not on the street frontage. Conservation areas and listed buildings generally require timber or high-quality timber-effect windows to preserve the character of the area. Always check with your local planning authority before ordering.
Yes. Aluminium windows run roughly 30 to 40 per cent more than the equivalent uPVC window. For most homes the performance difference does not justify the extra cost, though aluminium does offer slimmer sight lines and a longer theoretical service life.
No. uPVC frames do not need painting, staining or wood treatment. Cleaning with soapy water once or twice a year and oiling the hinges occasionally is all that is required across a 20 to 25 year lifespan.