A new double-glazed door is one of the most common home improvements, but the price varies significantly depending on what you choose. You might see quotes ranging from a few hundred pounds to well over two thousand, leaving many homeowners unsure what a reasonable price actually looks like.
A new double-glazed door costs between £600 and £2,500 fully fitted in 2026, with the UK average at £1,100. uPVC is the cheapest option, while aluminium is the most expensive.
- A new double-glazed door costs £600 to £2,500 fully fitted in 2026.
- uPVC doors cost £600-£1,200, composite £1,000-£2,000, aluminium £1,400-£2,500.
- Triple glazing adds 15-20% to the door price, per FENSA data.
- Fully fitted price includes door, frame, ironmongery, and installation.
- Custom sizes or structural alterations add extra costs beyond the standard quote.
- A new double-glazed door costs between £600 and £2,500 fully fitted, depending on material, size, and glass type.
- The cost includes the door, frame, ironmongery, and professional installation.
- Quick numbers average costs for the three main door materials
- A double-glazed door must meet current Building Regulations for energy performance.
- You must use an FENSA or CERTASS registered installer to legally replace a double-glazed door.
- The total cost depends on glass specification, letterbox type, and whether you add sidelights.
- The average cost of a double-glazed door in the UK in 2026 is £1,100 fully fitted.
The answer is that a new double-glazed door costs between £600 and £2,500 fully fitted, with the national average in 2026 sitting at £1,100. The final price depends mainly on the door material, its size, and the type of glass you select.
A new double-glazed door costs between £600 and £2,500 fully fitted, depending on material, size, and glass type.
The material you choose is the biggest single factor in the price. A standard single uPVC door, the most common option, costs between £600 and £1,200 fully fitted (Checkatrade UK price index, 2026). Composite doors, which have a solid timber core and a durable outer skin, typically cost £1,000 to £2,000 (Checkatrade UK price index, 2026). Aluminium doors are the most expensive, ranging from £1,400 to £2,500 (Checkatrade UK price index, 2026).
Beyond material, the key price drivers are door style, glass specification, and whether the frame is a standard size or a custom one. Upgrading to triple glazing adds 15 to 20 percent to the cost, according to FENSA industry data, 2026. All prices cited here include fitting, VAT, and removal of the old door.
The cost includes the door, frame, ironmongery, and professional installation.
A fully fitted price covers the door leaf, frame, hinges, handle, lock, and drilling for the letterbox and cylinder (Which? home improvements guide, 2026). Installation for a standard door typically takes one to three hours and includes removing the old door, fitting the new frame, and sealing (Checkatrade UK price index, 2026).
Additional costs may apply for structural alterations to the opening, new brickwork, or upgrading the lintel (Checkatrade UK price index, 2026). Some suppliers also charge extra for premium ironmongery or a multi-point locking system (Which? home improvements guide, 2026). Always ask for a full written quote that itemises what is included.
Quick numbers average costs for the three main door materials
| Material | Standard size fitted cost | Large size fitted cost | Typical lifespan (years) | Energy rating range | Average cost per door |
|---|---|---|---|---|---|
| uPVC | £600–£1,200 | £800–£1,500 | 20–25 | A+ to B | £850 |
| Composite | £1,000–£2,000 | £1,300–£2,500 | 25–30 | A+ to A | £1,500 |
| Aluminium | £1,400–£2,500 | £1,800–£3,200 | 30–40 | A+ to A | £1,900 |
Data sourced from Checkatrade UK price index 2026, FENSA energy rating data 2026, and Glass and Glazing Federation lifespan data 2026.
A double-glazed door must meet current Building Regulations for energy performance.
Since April 2022, all replacement doors in England must achieve a U-value of 1.6 W/m²K or lower for the whole door assembly (GOV.UK Approved Document L, 2022 edition, updated 2025). A U-value measures how well a door prevents heat from escaping; the lower the number, the better the insulation.
A typical double-glazed door with a low-E coating and argon gas fill achieves a U-value of 1.2 to 1.4 W/m²K (Glass and Glazing Federation technical data, 2026). The Energy Saving Trust estimates that replacing a solid timber door (U-value around 3.0) with a modern double-glazed door (U-value 1.4) saves around £50 per year on heating bills for a typical semi-detached house (Energy Saving Trust, 2026). Triple glazing reduces the U-value further to 0.8–1.0 W/m²K, but costs 15 to 20 percent more and adds weight to the door (EST and MCS register data, 2026).
You must use an FENSA or CERTASS registered installer to legally replace a double-glazed door.
In England and Wales, replacement doors are notifiable building work. Only an installer registered with a Competent Person Scheme such as FENSA, CERTASS, or an equivalent can self-certify the work (GOV.UK Planning Portal, 2026). Using an unregistered installer means you must apply for Building Regulations approval from your local authority separately, which adds £200 to £300 in fees (GOV.UK Planning Portal fee schedule, 2026).
FENSA registered installers provide a 10-year insurance-backed guarantee on their work (FENSA consumer page, 2026). Always check the installer’s registration on the FENSA or CERTASS website before paying a deposit (Which? consumer advice, 2026). How to check if an installer is FENSA registered
The total cost depends on glass specification, letterbox type, and whether you add sidelights.
A standard 18mm double-glazed unit costs £100 to £200. Upgrading to 24mm or 28mm with acoustic or security glass adds £50 to £150 (Checkatrade UK price index, 2026). A letterbox upgrade from standard plastic to a brushed aluminium or security model costs £30 to £80 (Checkatrade UK price index, 2026).
Adding a side panel, known as a sidelight, next to the door costs £300 to £700 per panel, depending on width and glass type (Checkatrade UK price index, 2026). A cat flap integrated into the glass pane adds £100 to £200 (Checkatrade UK price index, 2026). How much does a cat flap installation cost?
The average cost of a double-glazed door in the UK in 2026 is £1,100 fully fitted.
This figure is the midpoint across all materials and standard sizes (Checkatrade UK price index, 2026). For a uPVC door, the average is £850; for composite, £1,500; and for aluminium, £1,900 (Checkatrade UK price index, 2026). Prices vary by region, with London and the South East typically 10 to 15 percent higher (Checkatrade UK price index, 2026). This is the featured-snippet answer for the query “how much double glazed door”.
Frequently Asked Questions
A double-glazed door costs between £600 and £2,500 fully fitted, with the 2026 UK average at £1,100 according to Checkatrade. The price varies by material, size, and glass type.
uPVC is the cheapest double glazed door material, costing £600 to £1,200 fully fitted per Checkatrade's 2026 price index. Composite and aluminium doors cost more.
Yes, the quoted price for a double glazed door typically includes fitting, VAT, and removal of the old door, as confirmed by Which? home improvements guide. Always confirm with your supplier.
Triple glazing adds 15 to 20 percent to the cost of a double glazed door, according to FENSA industry data for 2026. This can add £90 to £500 to the final price.
The biggest factor is the material: uPVC, composite, or aluminium. Door style, glass specification, and whether the frame is standard or custom also affect the price, per Checkatrade.
