Cost of new windows in the UK
New windows in the UK typically cost £400–£800 per window for uPVC, £600–£1,200 for aluminium, and £800–£1,500 for timber. A full house replacement of 8–12 windows usually totals £5,000–£12,000 for uPVC, £8,000–£18,000 for aluminium and £10,000–£25,000 for timber sash or casement windows. Installation, scaffolding and Building Control compliance are included in most quotes.
Homeowners researching this typically also price up double glazing installation cost in the uk, cost of damp proofing in the uk and roof replacement cost in the uk. For wider context, browse our bathroom pricing, kitchen pricing and boiler & heating costs.
Cost table
| Item | Typical range (GBP) |
|---|---|
uPVC casement (standard) | £400–£650 |
uPVC sash | £600–£900 |
Aluminium casement | £600–£1,000 |
Aluminium sash | £800–£1,300 |
Softwood timber casement | £700–£1,100 |
Hardwood / engineered timber sash | £900–£1,500 |
Bay window (uPVC) | £1,200–£2,500 |
Bay window (timber) | £2,500–£4,500 |
Full house (8–10 windows, uPVC) | £5,000–£9,000 |
Full house (8–10 windows, timber) | £10,000–£20,000 |
Labour costs
Installation labour is included in most window quotes. A standard casement takes 2–3 hours; sash windows and bays take 4–6 hours each. Scaffolding for upper floors adds £200–£500.
| Item | Typical range (GBP) |
|---|---|
Standard casement install (each) | £120–£220 |
Sash window install (each) | £200–£400 |
Bay window install | £400–£800 |
Scaffolding (upper floors) | £200–£500 |
Removal & disposal of old windows | £30–£60 |
Materials costs
Window frames, glazing, hardware and seals make up the material cost. Triple glazing adds 15–25% over double glazing.
| Item | Typical range (GBP) |
|---|---|
uPVC frame (standard casement) | £250–£450 |
Aluminium frame | £400–£700 |
Timber frame (softwood) | £500–£800 |
Timber frame (hardwood) | £700–£1,200 |
Double glazing (per sealed unit) | £80–£180 |
Triple glazing (per sealed unit) | £120–£260 |
Factors affecting cost in the UK
- ·Frame material — uPVC is cheapest; timber is premium; aluminium is mid-to-high.
- ·Window style — casement is cheapest; sash, tilt-and-turn and bays cost more.
- ·Glazing — double is standard; triple adds 15–25% but improves thermal performance.
- ·Property type — Victorian bays, conservation restrictions and listed buildings need bespoke.
- ·Installation access — scaffolding, restricted parking and upper floors add cost.
Ways to reduce cost
- ·Get three quotes from FENSA-registered installers for certification and warranty.
- ·Replace all windows in one go for bulk discounts.
- ·Choose A-rated double glazing over triple for most UK climates.
- ·Avoid June–August when installers are busiest and prices peak.
- ·Consider uPVC with a wood-grain finish for a timber look at lower cost.
Frequently asked questions
- How long do new windows last?
- uPVC: 20–25 years. Aluminium: 30–40 years. Timber: 30–60 years with regular maintenance.
- Is triple glazing worth it in the UK?
- For most of the UK, high-quality double glazing (A-rated) is sufficient. Triple glazing benefits north-facing rooms, coastal properties and homes near busy roads.
- Do new windows need Building Control?
- Yes, unless installed by a FENSA-registered contractor who can self-certify compliance.
- Can I get a grant for new windows?
- Some local authority grants exist for energy efficiency, but national schemes like ECO focus on insulation and heating. Check with your council.
- How much do new windows save on energy bills?
- A full house of A-rated double glazing can save £150–£300 per year on heating bills compared to single glazing.