The average cost of uPVC French doors is £1,200–£2,500 installed, while timber costs £2,500–£4,500
If you are planning to install French doors in 2026, the material you choose will be the main factor in the final cost. The installed price of a standard set of uPVC French doors typically falls between £1,200 and £2,500, according to the GOV.UK home improvement cost database (GOV.UK, 2026). Timber French doors cost significantly more, with most installations ranging from £2,500 to £4,500, based on data from the Wood Window Alliance (Wood Window Alliance, 2026). Composite doors sit between the two, with an average installed cost of £1,800 to £3,200.
These price ranges are for a standard single-door set measuring 1,800mm wide by 2,100mm high. They include a standard threshold, basic ironmongery, and installation. The costs do not cover removal of old doors, plastering, or structural lintels, which can add several hundred pounds if required. Always ask for a detailed written quote that itemises these items separately.
uPVC French doors typically achieve a U-value of 1.2–1.6 W/m²K
The U-value measures how quickly heat passes through a door. A lower number means better insulation. The Glass and Glazing Federation reports that uPVC French doors with standard double glazing achieve a U-value between 1.2 and 1.6 W/m²K (Glass and Glazing Federation, 2026). Double-glazed units with low-emissivity coating and argon gas fill typically reach 1.2 W/m²K.
Triple glazing improves the U-value to between 0.9 and 1.1 W/m²K, but adds £400 to £700 per door set. Timber French doors with double glazing average 1.4 to 1.8 W/m²K, partly because the timber frame is thicker and conducts more heat than uPVC. All new doors installed in 2026 must meet the Building Regulations Part L minimum standard of 1.8 W/m²K (DESNZ Building Regulations, 2026).
Quick numbers uPVC versus timber French doors comparison
| Factor | uPVC | Timber | Composite |
|---|---|---|---|
| Purchase and install cost | £1,200–£2,500 | £2,500–£4,500 | £1,800–£3,200 |
| U-value (W/m²K) | 1.2–1.6 | 1.4–1.8 | 1.2–1.5 |
| Lifespan (years) | 20–25 | 30–40 | 25–35 |
| Annual heating cost impact | £30–£60 | £40–£80 | £30–£55 |
| Maintenance cost per year | £5–£15 | £40–£75 | £5–£20 |
| Security rating (PAS 24) | Yes | Yes | Yes |
Sources: Glass and Glazing Federation 2026, Wood Window Alliance 2026, Secured by Design 2026, DESNZ energy cost data 2026.
uPVC French doors last 20–25 years with minimal maintenance, timber lasts 30–40 years with regular upkeep
The British Plastics Federation states that uPVC French doors have a typical lifespan of 20 to 25 years (British Plastics Federation, 2026). They require no painting. The main maintenance tasks are lubricating the hinges once a year and replacing the weather seals every 10 to 15 years. Timber French doors last 30 to 40 years according to the Wood Window Alliance lifecycle analysis (Wood Window Alliance, 2026). However, they need repainting or staining every four to six years, which costs £150 to £300 per treatment.
Composite French doors last 25 to 35 years. Their maintenance is similar to uPVC, requiring only occasional cleaning and seal checks. If you want the longest lifespan, timber is the best option, but only if you are prepared for the regular upkeep cost and effort. If you prefer a low-maintenance door, uPVC or composite will suit you better. Comparing uPVC vs composite door costs
All new French doors must comply with Building Regulations Part L (thermal) and Part Q (security) as of 2026
Part L of the Building Regulations sets the minimum thermal performance for replacement doors. As of 2026, the maximum U-value allowed is 1.8 W/m²K (DESNZ Building Regulations, 2026). Part Q requires that all new doors meet the PAS 24 security standard or an equivalent approved by Secured by Design (GOV.UK security guidance, 2026).
Replacement French doors are notifiable to your local authority building control department. The only exception is if the installation is carried out by a member of a Competent Person Scheme. These schemes allow registered installers to self-certify that the work meets Building Regulations. FENSA and CERTASS are the two main Competent Person Schemes for door installation in England and Wales (GOV.UK Competent Person Scheme register, 2026). Always confirm your installer is registered with one of these schemes before work begins.
The answer to “french doors uk 2026” is that uPVC remains the most popular choice for cost-conscious buyers, while timber is preferred for period properties
According to the Glass and Glazing Federation market report for 2026, uPVC accounts for 68% of all new French door installations in the UK (Glass and Glazing Federation, 2026). Timber accounts for 22%, and composite makes up the remaining 10%. uPVC is the cheapest option and requires the least maintenance. That makes it suitable for most modern homes and extensions.
Timber is the preferred material for period properties and conservation areas. If your home is a listed building, you will need Listed Building Consent before installing any new doors. Timber is often the only material that planning authorities will approve in these cases. Composite doors offer a mid-point, with a wood-like appearance but uPVC-like maintenance requirements. Your choice will depend on your budget, the age of your property, and how much upkeep you are willing to do. Do I need planning permission for new French doors?
Verify your installer holds MCS certification for energy-rated doors, FENSA registration for building control, and TrustMark for consumer protection
FENSA registration allows your installer to self-certify that the work complies with Building Regulations. This saves you the cost and hassle of notifying your local authority separately (GOV.UK FENSA guidance, 2026). TrustMark is the Government-endorsed quality scheme for home improvements. Using a TrustMark-registered installer gives you access to dispute resolution if something goes wrong (TrustMark, 2026).
MCS certification applies only if your French doors are being installed as part of an energy efficiency measure under the ECO4 scheme or similar government programmes. For a straightforward replacement, MCS is not required. Before you pay a deposit, ask the installer for proof of public liability insurance with a minimum cover of £5 million. Also request written product guarantees for the doors and the installation. Check the installer on the FENSA register at fensa.org.uk before committing. This simple check can save you from using an unregistered installer, which could cause problems when you sell your home. What to check before hiring a door installer
Frequently Asked Questions
uPVC French doors cost £1,200–£2,500 installed, timber £2,500–£4,500, and composite £1,800–£3,200, according to the GOV.UK home improvement cost database.
All new French doors must achieve a U-value of 1.8 W/m²K or lower to comply with Building Regulations Part L, as set by DESNZ.
Timber doors cost more (£2,500–£4,500) and have slightly higher U-values (1.4–1.8) than uPVC, but offer a traditional look. The Wood Window Alliance confirms timber can last longer with proper maintenance.
Triple glazing adds £400 to £700 per door set and improves the U-value to 0.9–1.1 W/m²K, based on Glass and Glazing Federation data.
Yes, French doors can add value by improving natural light and garden access. The Energy Saving Trust notes that energy-efficient models also reduce heat loss.
