“How much?” is the first question everyone asks and the last one anyone answers straight. Two quotes for what looks like the same job can differ by thousands.
Here’s a realistic guide to what you’ll pay for windows and doors in the UK in 2026. We’ll cover what moves the price, and how to compare quotes without getting lost.
Windows and Doors Cost: The Short Version
For a typical home, replacing all the windows and a few doors often lands somewhere around £6,000 to £9,000. Larger houses, premium frames, and extra glazing push that much higher.
The real answer depends on material, size, and how much building work sits behind the frames. Let’s break it down.
Window Prices by Material
These are rough installed prices per window for 2026:
- uPVC casement: roughly £350 to £700
- Aluminium casement: roughly £700 to £1,400
- Timber: usually priced above uPVC, and it needs regular upkeep
uPVC is the most common choice because it’s affordable and low maintenance. Aluminium costs more, but it gives slimmer frames and a sharper, more modern look.
Door Prices by Type
Again, treat these as ballpark figures for supply and fit:
- uPVC door: roughly £600 to £1,400
- Composite front door: roughly £900 to £2,000
- Aluminium front door: roughly £1,500 to £3,500
- uPVC patio or French doors: roughly £900 to £3,100
- Bi-fold doors: roughly £3,000 to £6,800, depending on material and panel count
Bi-folds and large sliding doors cost more partly because they often need structural work, such as a new lintel, on top of the doors themselves.
What Pushes the Price Up or Down
- Frame material, with aluminium often costing 30 to 60% more than uPVC
- The size and number of openings
- Glazing, such as triple, acoustic, or laminated glass
- Colours and finishes, especially dual-colour or bespoke shades
- Structural work, plastering, and replacing damaged cills
- Lead times, since aluminium can take six to ten weeks against two to four for uPVC
- Location, because prices for windows and doors in London often run higher than the national average, thanks to labour, parking, and access
A Simple Example
Picture a three-bed semi with eight windows, a front door, and a back door. Eight uPVC windows at £350 to £700 each come to £2,800 to £5,600.
Add a composite front door at £900 to £2,000 and a uPVC back door at £600 to £1,400. The total lands between about £4,300 and £9,000. Switch to aluminium, and the figure climbs sharply.
How to Compare Quotes Fairly
Quotes can vary by 30 to 50% between installers, so the cheapest number isn’t always the best deal. When you compare windows and doors costs between firms, make sure each quote covers the same specification.
- Is every opening listed and priced separately?
- Does the price include removal, disposal, and making good?
- What glazing and energy rating are you getting?
- How long is the guarantee, and who stands behind it?
- Is the installer registered with a scheme such as FENSA or CERTASS?
Ways to Keep the Cost Down
- Use uPVC or composite for less visible openings, and spend more where it shows
- Stick to standard sizes where you can
- Avoid moving or widening openings unless you need to
- Phase the work, starting with the worst windows or the front door
Grants for windows are rare, so don’t count on one to cover the bill.
Rules and Paperwork to Know About
- Replacement windows and doors must meet Building Regulations, and a registered installer can self-certify the work
- Conservation areas, listed buildings, and Article 4 areas can restrict what you can change
- Flats and leasehold properties may need the freeholder’s consent
At Lumiere View, we’d rather explain every line of a quote than leave you guessing.
Lumiere View is based in Uxbridge and provides window and door services across London and the UK.
