New windows cost UK 2026
Replacement windows in the UK typically cost £400–£1,200 per UPVC window installed, depending on size, glazing spec, and window style. Whole-house replacement on a 3-bed semi (8–12 windows) typically lands £4,000–£14,000. Aluminium adds 25–40%; hardwood timber adds 50–100%.
Cost guide ranges
| Window type | Per window | 8 windows | 12 windows |
|---|---|---|---|
| UPVC casement (small) | £350–£600 | £3,000–£5,000 | £4,500–£7,500 |
| UPVC casement (standard) | £500–£900 | £4,200–£7,500 | £6,000–£11,000 |
| UPVC sash window (heritage) | £900–£1,500 | £7,500–£12,500 | £11,000–£18,000 |
| Aluminium casement | £700–£1,300 | £5,800–£10,800 | £8,500–£15,500 |
| Hardwood timber casement | £900–£1,800 | £7,500–£15,000 | £11,000–£22,000 |
| Triple glazing upgrade | +£100–£250 per window |
What's typically included
- Removal of existing windows + frames
- Disposal of old units
- New window with double glazing
- Trickle vents (required by current building regs)
- Sealing, beading, and external pointing
- FENSA or CERTASS certification
- Standard 10-year manufacturer guarantee
What's typically NOT included
- Internal redecoration after install (£200–£500 per room)
- External rendering or repair if frame larger than original
- Sash horns or heritage details (Georgian / Victorian properties)
- Window film or solar control coatings
- Acoustic glass for noisy locations (£40–£100 extra per window)
- Bespoke shapes (arched, octagonal) — usually +30–60%
What drives the price
- Frame material — UPVC cheapest, aluminium mid (slimmer profiles, modern look), hardwood timber most expensive (heritage/conservation areas often require it).
- Glazing — standard double glazing baseline. Triple glazing adds £100–£250/window. Acoustic glass £40–£100 extra. Solar control £30–£80 extra.
- Window size — large picture windows or floor-to-ceiling units cost 50–200% more than standard. Many suppliers price by frame perimeter.
- Window style — casements cheapest. Sashes 50–80% more (more parts, more labour). Tilt-and-turn 15–30% more. Bay windows 30–60% more (multi-panel + structural lintel).
- Heritage / conservation area — full hardwood, slim sightlines, sash horns can double the per-window cost vs equivalent UPVC.
- Whole-house vs single window — most installers offer 10–25% volume discount on whole-house orders.
Try the free text quote demo — no signup needed
Branded PDF quote with a costed scope of works in 30 seconds. No card, no photo needed.
How we estimated these ranges
This is a guide only. The ranges below are intended for early budgeting and trade benchmarking. They are not a substitute for a site visit or an itemised quote from a qualified tradesperson. Always get a site-specific quote before agreeing work.
What's included in these ranges: typical labour costs, common materials at standard specification, and routine preparation or installation work for a standard project of this type.
What's excluded: unusual access (multi-storey, restricted parking), unforeseen structural issues, specialist design or architect fees, planning and building control application fees, premium or high-end finishes, emergency or out-of-hours work, and regional extremes.
Regional note: London, the South East and remote rural areas can vary significantly from the UK averages shown. London labour rates in particular can run 30–50% higher than national averages on the same scope.
Sources and checks used: publicly available UK trade supplier pricing (2025–2026), common day-rate and labour-duration assumptions used in trade quoting, internal example quote structures from TailoredQuote platform data, and where relevant cross-referenced regional contractor surveys and BCIS-style construction cost data.
Last reviewed: May 2026 by TailoredQuote. Prices in this guide will be reviewed and updated periodically.
Frequently asked questions
£400–£1,200 per UPVC window installed. £4,000–£14,000 for whole-house (8–12 windows) replacement.
UPVC is cheapest and lowest-maintenance. Aluminium gives slimmer sightlines and a modern look. Timber is most expensive but mandatory in many conservation areas. For most 3-bed homes, mid-range UPVC is the sensible default.
Marginal in mild UK climate. Adds £100–£250 per window. Energy savings typically £50–£150/year on a whole house — payback is 15–25 years. Better noise reduction is the more compelling reason.
Like-for-like replacement on a standard property doesn't usually need planning. Conservation areas, listed buildings, and changes that significantly alter the appearance (different size, divided differently) need planning permission.
Related cost guides
Last reviewed: May 2026
Start free — no card needed
14-day free trial. No card needed. Cancel any time.
Start Free Trial Or try the free demo