Quick Answer
Timber sash windows: £1,200–£2,500/window. Casement: £1,000–£1,800. Bifold doors: £3,000–£8,000 per set. French doors: £2,500–£4,000. All prices supply, fit, and decoration included.
Window Prices by Type
| Window / Door Type | Price Range (Supply & Fit) | Per m² |
|---|---|---|
| Sash window (softwood, DG) | £1,200 – £2,500 | £800 – £1,000 |
| Casement window (softwood, DG) | £1,000 – £1,800 | £700 – £900 |
| French doors (pair) | £2,500 – £4,000 | £850 |
| Bifold doors (3–5 panels) | £3,000 – £8,000 | £1,000 – £1,300 |
| Sliding doors (2–4 panels) | £3,500 – £9,000 | £1,000 – £1,300 |
| Patio doors (pair) | £2,800 – £4,500 | £900 |
All prices include survey, manufacture, installation, decoration, and removal of old windows. VAT included. May 2026.
What Makes Windows Expensive (and What Doesn’t)
Timber species — the biggest variable
Engineered softwood is the standard and most affordable option. Accoya adds 30–40% but delivers dramatically better durability. Hardwood (sapele, oak) is premium — 40–60% more. For most homes, softwood with a good paint system is excellent value. Choose Accoya for ground-floor windows or exposed positions where weather hits hardest.
Glazing — double vs triple
Double glazing is now standard. Triple adds 25–35% to the cost. Read our double vs triple glazing comparison to decide.
Glazing bars
Plain windows (no bars) are cheapest. Georgian-style glazing bars (6-over-6) add £150–£250 per window due to the additional joinery.
Colour
Any RAL or Farrow & Ball colour is included in the standard price. Dual colour (different inside and outside) adds £50–£80 per window.
Access and installation difficulty
Ground floor windows are straightforward. First and second floor may need scaffolding (£500–£1,500 for a terraced house). Basement windows with restricted access can add time.
Design Your Windows and Get an Instant Price
Our 3D configurator covers sash, casement, bifold, sliding, and French doors. Configure exact dimensions, timber, glazing, and colour.
Open the 3D Configurator Book a SurveyWhole House Estimates
| Property | Typical Windows | Softwood (DG) | Accoya (DG) |
|---|---|---|---|
| 1-bed flat | 3–5 | £4,000–£8,000 | £5,500–£10,500 |
| 2-bed Victorian terrace | 6–8 | £9,000–£14,000 | £12,000–£18,000 |
| 3-bed Victorian terrace | 10–12 | £15,000–£25,000 | £20,000–£33,000 |
| 4-bed semi-detached | 14–16 | £22,000–£35,000 | £29,000–£45,000 |
How to Get an Accurate Quote
Online configurators (like ours) give you a ballpark within 5–10% of the final price. For an accurate quote you need a site survey — because:
- Actual opening sizes may differ from what you measure
- Structural condition of the reveals affects installation method
- Access, scaffolding, and skip requirements need assessing
- Conservation area requirements may dictate specific details
We offer free site surveys across London and the Home Counties. Book yours here.
Frequently Asked Questions
How much do new windows cost per window?
Timber sash windows cost £1,200–£2,500 per window. Casement windows cost £1,000–£1,800. Bifold doors cost £3,000–£8,000 for a set. French doors cost £2,500–£4,000 for a pair. All prices supply and fit.
Are timber windows more expensive than uPVC?
Yes, typically 2–3 times more upfront. A uPVC sash window costs £500–£900 installed. A timber equivalent costs £1,500–£2,500. However, timber lasts 60–100 years vs 20–25 for uPVC, making it cheaper per year over its lifetime.
How much do new windows cost for a whole house?
For a 3-bed Victorian terrace with 10–12 windows: £15,000–£25,000 in timber with double glazing. A 4-bed semi with 14–16 windows: £22,000–£35,000. Prices vary with timber species and glazing specification.
Do new windows add value to a house?
Yes. New timber windows can add 5–10% to property value in conservation areas. Even outside conservation areas, quality windows are one of the first things buyers notice. Estate agents consistently report that new windows help achieve asking price.
Is it worth replacing windows before selling?
Usually yes if the current windows are visibly worn. New windows improve kerb appeal, EPC rating, and remove a negotiation point for buyers. The cost is often recouped in the sale price.