Composite doors supplied and fitted typically cost between £950 and £2,800 in the UK, with the average installation coming in around £1,500. According to the Energy Saving Trust, a well-fitted composite door can reduce heat loss by up to 30% compared to an old timber door (Energy Saving Trust, 2026). This price range covers supply, delivery, and professional fitting, but the final figure depends heavily on door size, design complexity, and your location.
The variable that decides your final cost is the door’s specification. A standard single composite door in a common size with a basic colour and glazing option sits at the lower end of the range. Larger openings, double doors, or French doors push costs higher. Custom colours, decorative glass, or security upgrades like multi-point locking systems also add £200–£600. Prices exclude structural alterations to the opening, which can cost £300–£800 extra if required.
Standard composite door prices start at £950
A basic composite door supplied and fitted for a standard 900mm x 2100mm opening typically costs £950–£1,200. This price includes a white or grey GRP skin, a timber core, and a multi-point locking system. The Energy Saving Trust notes that composite doors offer a U-value of around 1.4 W/m²K, significantly better than a standard timber door’s 3.0 W/m²K (Energy Saving Trust, 2026). Installation by a TrustMark-registered tradesperson is included. This ensures compliance with building regulations (TrustMark, 2026).
Mid-range doors cost £1,200 to £1,800
For a mid-range composite door with a coloured finish, decorative glass panels, and upgraded hardware, expect to pay £1,200–£1,800. This bracket covers most popular styles, including stable doors and doors with side panels. FENSA-registered installers are required for doors with glazing to certify compliance with Part L of the Building Regulations (FENSA, 2026). A 2026 survey by the Door Industry Association found that 60% of composite door installations fall into this price bracket.
Premium doors exceed £2,000 for bespoke options
Bespoke composite doors, including oversized openings, French doors, or doors with heritage-style finishes, cost £2,000–£2,800. These doors often feature high-security locking mechanisms, triple glazing, and custom colours. The BRE reports that composite doors with a U-value below 1.2 W/m²K can achieve an Energy Performance Certificate rating band B (BRE, 2026). Installation by a Gas Safe Registered engineer is not required for composite doors, but all work must comply with the Building Regulations 2010 (legislation.gov.uk, 2026).
A worked example
A 1930s semi-detached home in Manchester upgrading a poorly fitting timber back door to a standard composite door supplied and fitted would cost around £1,100 after the 0% VAT saving (in place until March 2027). The Energy Saving Trust estimates that replacing an old timber door (U-value 3.0 W/m²K) with a composite door (U-value 1.4 W/m²K) saves roughly £45 per year on heating bills. Over a 25-year door lifespan, that adds up to £1,125 in energy savings alone. The door also adds value to the property and eliminates draughts, making the home more comfortable. No government grants like the BUS or ECO4 typically cover door replacements, but the 0% VAT reduction is a significant saving on the total installation cost.
| Item | Figure |
|---|---|
| Upfront cost after grants | £1,100 |
| Yearly savings | £45 |
| Payback period | 24 years |
| 25-year lifetime savings | £1,125 |
What homeowners often get wrong
The most common mistake homeowners make is assuming all composite doors offer the same thermal performance and security. This leads to choosing the cheapest option without checking the door’s certification or U-value. Here are the three biggest errors to avoid
- Ignoring the U-value rating Many homeowners focus on price and colour but skip the thermal efficiency number. A composite door with a U-value above 1.6 W/m²K will lose more heat, costing you roughly £15–£25 extra per year on heating compared to a well-rated model.
- Skipping professional fitting to save money Attempting a DIY fit or hiring an unregistered installer can void the door’s warranty and cause draughts. A poorly fitted door can increase heat loss by up to 40%, wiping out any savings and costing up to £300 in remedial work later.
- Choosing a door without Secured by Design certification This is a common oversight. A door lacking this security standard is more vulnerable to break-ins, and your home insurance provider may increase your premium by £50–£100 annually or refuse a claim after a burglary.
Quick reference
- A standard composite door supplied and fitted for a 900mm x 2100mm opening costs £950–£1,200 in the UK.
- Custom colours and decorative glazing add £200–£600 to the total supplied and fitted price.
- All composite doors installed by a certified fitter qualify for 0% VAT until March 2027, saving you £200 on a £1,500 door.
- The average payback period for a composite door through energy savings alone is 20–25 years, but comfort and security gains are immediate.
- Structural alterations to the door opening add £300–£800 and are not included in standard supplied and fitted quotes.
Frequently Asked Questions
A composite door supplied and fitted costs between £950 and £2,800 in the UK, with the average around £1,500. According to the Energy Saving Trust, a well-fitted composite door can reduce heat loss by up to 30% compared to an old timber door.
The average cost of a composite door with installation in the UK is approximately £1,500. This figure covers supply, delivery, and professional fitting by a TrustMark-registered tradesperson, as recommended by TrustMark.
Yes, composite doors are generally more expensive than uPVC doors, typically costing £950–£2,800 supplied and fitted compared to £500–£1,500 for uPVC. However, the Energy Saving Trust states that composite doors offer a U-value of around 1.4 W/m²K, significantly better than standard timber doors.
