New double-glazed windows in the UK typically cost about £350 to £750 each fitted for uPVC, £600 to £1,500 for aluminium and £900 to £1,800 for timber. A whole house of 10 to 12 windows in uPVC is usually about £4,000 to £8,000.
Sash, bay and bespoke windows cost more, and conservation areas and listed buildings can limit the materials you may use.
New windows cost estimator
The estimator uses indicative prices per window from the sources below and does not replace a quote. Larger windows, bays and bespoke shapes cost more than the typical figures. The style adjustments are indicative allowances: sash windows cost noticeably more than casements, and Georgian bars add a smaller premium.
New window cost by frame material
Typical supplied and fitted prices per window for a standard double-glazed unit.
| Frame | Typical cost per window | Notes |
|---|---|---|
| uPVC | £350 to £750 | Most popular, low maintenance, usually 20 to 30 years. |
| Aluminium | £600 to £1,500 | Slim frames and modern looks, often longer lasting. |
| Timber | £900 to £1,800 | Premium look, preferred in many conservation areas, needs maintenance. |
Sash windows that copy the look of timber cost more than casements. One guide puts uPVC sashes at £700 to £1,500 each. Published guides vary, and large or bespoke windows cost more.
Cost to replace all the windows in a house
For a typical three-bedroom semi with about 10 to 12 windows:
| Frame | Whole-house cost |
|---|---|
| uPVC | Usually about £4,000 to £8,000 |
| Aluminium or timber | Often £10,000 to £16,000 or more for premium specifications |
Typical window cost at a glance
Typical supplied and fitted price per window.
What pushes the cost up or down
- Frame material: uPVC is the cheapest, and aluminium and timber cost more.
- Style: sash, bay and bespoke shapes cost more than standard casements.
- Glazing specification: triple glazing, acoustic or security glass adds cost.
- Size and number: large windows cost more each, but fitting many together may reduce the unit price.
- Access: upper floors may need scaffolding.
- Location and consent: conservation areas and listed buildings can require specific materials.
Costs people forget
| Item | Typical allowance |
|---|---|
| Scaffolding or access | May be needed for upper floors |
| Making good plaster and decoration | £400 to £1,200, often not included |
| New window boards and trims | Often priced separately |
| Trickle vents and security locks | Check what is included in the specification |
| Disposal of old windows | Often included, but check |
| Certificate of compliance | Ask for a FENSA or similar certificate |
Replacement windows in England must meet current thermal performance standards, and installers on a competent person scheme such as FENSA can self-certify. See the U-value glossary page and our window fitter and glazier pages.
Old or listed home?
Conservation areas and listed buildings may restrict window materials and styles, and some need listed building consent. Check before you order.
See our listed buildings guides for the rules.
Window styles explained
If the names are new to you, here is what each style means. They differ in how the window opens or how the glass looks, and that changes the price.
Casement window
The most common style. The opening panels are hinged at the side and swing outwards like a door, with dashed lines on the drawing showing the hinge side.
Best for: most homes. Good seal, easy to use and usually the cheapest.
Tilt-and-turn window
One panel that opens inwards like a door, or tilts in at the top for safe ventilation. It can be cleaned from inside, which suits upper floors.
Best for: flats and upper floors. Usually priced close to a casement.
Sash window
Two panels that slide up and down in tracks, so the window opens from the bottom, the top or both. The traditional look on Victorian and Georgian houses.
Best for: period homes and conservation areas. Costs noticeably more than a casement.
Georgian bar window
Not a way of opening but a pattern: thin bars divide the glass into small panes, often six or nine per panel. They can be fitted on casements and sashes alike.
Best for: a period look. Adds a smaller premium on top of the window price.
Building regulations, certificates and consents
Replacement windows in England must meet the thermal performance standards in the building regulations. An installer registered with a competent person scheme, such as FENSA or CERTASS, can self-certify the work and you receive a certificate, which buyers' solicitors often ask for. Planning permission is not normally needed for like-for-like replacement, but permitted development rights can be restricted in conservation areas, and listed buildings need listed building consent for most changes.
Cutting the cost without cutting corners
- Get at least three itemised quotes that name the glass, frame and fitting.
- Replace the draughtiest or north-facing windows first if you cannot do them all.
- Choose standard sizes rather than bespoke shapes.
- Compare double and triple glazing on payback, not only price.
- Do not rely on a single large firm's first quote, because discounts are common.
Sources and further reading
- ExpertSure: window costs Typical per-window prices
- Book a Builder: window replacement cost 2026 Cost ranges and whole-house prices
- MyJobQuote: uPVC windows cost Cost ranges for uPVC windows
- Planning Portal: windows and doors Planning and regulations basics
External links open in a new tab. Costs combine several published price guides, which differ. Last checked November 2026.
Frequently asked questions
How much do new windows cost in the UK?
Typically about 350 to 750 pounds each fitted for uPVC, 600 to 1,500 pounds for aluminium and 900 to 1,800 pounds for timber. A whole house in uPVC is usually 4,000 to 8,000 pounds.
How much does it cost to replace all the windows in a house?
About 4,000 to 8,000 pounds for a typical semi in uPVC, and 10,000 to 16,000 pounds or more for timber or premium aluminium.
Are timber windows worth the extra cost?
They suit older and listed homes and can last well with maintenance, but cost more than uPVC. Some conservation areas prefer or require timber.
Do I need planning permission for new windows?
Not usually for like-for-like replacement in England, but conservation areas and listed buildings have extra rules.
How long does it take to fit new windows?
Most houses take one to three days, depending on the number of windows and any making good.