For big glazed openings, pricing window by window gets awkward, so it is often easier to think about aluminium windows cost per m2. That per-square-metre approach lets you scale a rough budget up or down as the size of the opening changes, which is handy when you are planning a large picture window, a run of glazing or a modern extension.
This guide explains how the per m2 figure works, what it typically comes to in 2026 and what pushes the rate higher or lower.
Why price aluminium windows per m2
Aluminium is the go-to for larger, slimmer-framed windows because the metal is strong enough to hold big panes of glass in a thin frame. When openings get large, a flat per-window price stops being useful, since one window might be the size of three. Working in pounds per square metre gives you a rate you can multiply by the area, which makes budgeting a big opening far simpler.
It is a planning tool, not an exact science, but it gets you close enough to know whether a scheme is affordable before you commit.
Aluminium window costs per m2 in 2026
As a rough 2026 guide, supplied and fitted, aluminium windows often work out around 550 to 900 pounds per square metre. Premium systems, complex shapes or high-spec glazing can push that higher.
So, very roughly:
- A 1.5 square metre window might land around 850 to 1,350 pounds.
- A 3 square metre run might sit around 1,650 to 2,700 pounds.
- A large 5 square metre glazed opening might come to 2,750 to 4,500 pounds or more.
These are guide ranges, not a quote. The rate per m2 actually drops a little on very large panes and rises on small, fiddly ones, so treat these as a starting point. For a firm figure, request a free quote and we will price the actual openings. You can see the range in our aluminium windows section.
What moves the rate up
A few things push the per m2 figure higher:
- Opening styles. Fixed picture windows are cheaper per m2 than lots of opening casements, because every opener adds hardware.
- Glazing spec. Triple glazing, solar control, acoustic or safety glass all add to the rate.
- Colours and finishes. Standard anthracite grey is common, but dual colours or special finishes cost more.
- Shape. Squares and rectangles are cheapest. Curves, angles and bespoke shapes add labour.
- Access and fitting. High or awkward openings take longer to fit safely.
What keeps the rate down
To keep the figure sensible:
- Go for larger fixed panes where you can, with fewer openers.
- Stick to a standard colour unless a special finish really matters to you.
- Keep shapes simple. Rectangles are the most cost-effective.
- Do the whole job together, since a single visit for one big opening spreads the setup cost efficiently.
Aluminium versus uPVC on cost
Aluminium costs more per m2 than uPVC, there is no hiding that. What you get for the extra is a much slimmer frame, more glass and less frame, a crisp modern look and a frame that stays rigid on very large spans. For big openings where you want maximum light and a clean line, that trade-off is usually worth it. For standard-sized windows on a budget, uPVC often makes more sense. The right choice depends on the opening and the look you are after, and we are happy to talk both through when we visit.
FAQs
How much do aluminium windows cost per m2 in 2026?
As a rough 2026 guide, aluminium windows often work out around 550 to 900 pounds per square metre supplied and fitted, with premium systems and high-spec glazing costing more. The rate eases slightly on very large panes and rises on small, complex ones. Get a quote for a firm figure.
Is the per m2 price accurate for small windows?
Not really. Small windows have a higher per m2 rate because the hardware, fitting and setup costs are spread over less area. The per m2 approach works best for larger openings, where it gives a reasonable budgeting figure.
Why is aluminium more expensive than uPVC per m2?
Aluminium is a stronger, more premium material that allows slimmer frames and larger panes of glass, and it comes with a more involved manufacturing and finishing process. You pay more per m2 but get more glass, a slimmer sightline and a rigid frame on big spans.
Does triple glazing add much to the per m2 cost?
It adds a fair bit, since triple glazing uses more glass and a heavier unit. Whether it is worth it depends on the room and your priorities. On many homes good double glazing is plenty, so it is worth weighing up before you spec triple.
Want to see the finishes and styles behind these figures? Download our latest brochure, or request a free quote and we will pop out to measure up.