Aluminium Window Prices UK 2026
Aluminium windows offer a sleek contemporary aesthetic with slim sightlines and exceptional durability. They're favoured for modern architecture, extensions, and period properties seeking a high-end finish.
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Slim aluminium windows on a contemporary UK home extension
Aluminium Window Costs Per Window (2026)
| Window Size | Supply Only | Supply & Fitted |
|---|---|---|
| Small (600×900mm) | £600 – £750 | £800 – £1,000 |
| Medium (1000×1200mm) | £700 – £850 | £950 – £1,200 |
| Large (1400×1400mm) | £800 – £900 | £1,100 – £1,400 |
Overall, aluminium windows cost £800–£1,400 per window installed — compared to £500–£1,000 for uPVC.
Full House Aluminium Window Costs
| Property | Windows | Estimated Cost (Fitted) |
|---|---|---|
| Flat | 4 | £3,200 – £5,600 |
| 2-Bed House | 6–8 | £4,800 – £8,400 |
| 3-Bed House | 8–10 | £6,400 – £10,500 |
| 4-Bed Detached | 12–15+ | £9,600 – £16,000 |
Aluminium vs uPVC Windows
| Feature | Aluminium | uPVC |
|---|---|---|
| Cost per window (fitted) | £800 – £1,400 | £500 – £1,000 |
| Lifespan | 40–45 years | 20–25 years |
| Sightlines | Ultra-slim | Wider |
| Recyclability | 100% | Partial |
| Maintenance | Very low | Very low |
Are aluminium windows worth the extra cost?
Aluminium windows last nearly twice as long as uPVC (40+ vs 20+ years), look more premium, and suit modern architecture better. If you're planning to stay in your home long-term, the higher upfront cost can represent better value.
Do aluminium windows suffer from condensation?
Modern aluminium frames use a thermal break — an insulating layer within the frame — that virtually eliminates the condensation problems associated with older metal frames.
Can aluminium windows be repainted?
Aluminium is powder-coated at the factory and can be professionally re-sprayed in any RAL colour. This typically costs £60–£150 per window.