The installed cost of double glazed patio doors in 2026 starts at £1,200 and can exceed £5,000 for premium bi-fold models
Homeowners considering a new set of patio doors face a wide price range. The final figure depends on three main variables: door type, frame material, and size.
Double glazed patio doors cost £1,200 to £7,000+ installed in 2026. The price depends on door type (sliding, French or bi-fold), frame material and size. Compare quotes from FENSA-registered installers to get the best deal.
- uPVC sliding patio doors start at £1,200 installed for a 1.8m x 2.1m set.
- Aluminium sliding doors cost £2,000 to £4,000, timber from £2,500.
- Bi-fold doors range from £2,500 (uPVC) to £7,000+ (aluminium).
- Installation labour adds £300 to £800 to the total cost.
- Get at least three quotes from FENSA-registered installers for accuracy.
- The installed cost of double glazed patio doors in 2026 starts at £1,200 and can exceed £5,000 for premium bi-fold models
- Double glazed patio door costs by type sliding, French, and bi-fold compared
- Quick numbers typical price ranges for double glazed patio doors (2026)
- How glass specification and frame material affect the final price
- The direct answer how much double glazed patio doors cost in 2026
- How to verify your installer MCS, FENSA, and TrustMark certification
- Energy performance and potential savings from double glazed patio doors
- When to replace vs. repair your existing patio doors
A standard 1.8m x 2.1m uPVC sliding patio door installed typically costs between £1,200 and £2,500. A comparable aluminium sliding door ranges from £2,000 to £4,000, while timber starts at £2,500. Bi-fold doors with three leaves cost £2,500 to £5,000+ for uPVC, and £3,500 to £7,000+ for aluminium. These figures come from the FENSA 2025/26 market report and the Glass and Glazing Federation (GGF) pricing guide (FENSA, 2026).
Double glazed patio door costs by type sliding, French, and bi-fold compared
Sliding patio doors are the most affordable option, with a 2-panel uPVC set starting at £1,200 installed. French patio doors, which open outward on hinges, cost £1,500 to £3,000 for uPVC and £2,500 to £4,500 for aluminium. Bi-fold doors are the most expensive, starting at £2,500 for a 3-leaf uPVC set and rising to £6,000+ for aluminium with a thermal break.
Installation labour adds £300 to £800 to the base door price, depending on complexity and whether old doors need removal. These ranges are based on GGF member installer survey data (GGF, 2026).
Quick numbers typical price ranges for double glazed patio doors (2026)
| Door Type & Material | Typical Size (W x H) | Installed Cost Range | Frame Material | Glass Type |
|---|---|---|---|---|
| Sliding, uPVC | 1.8m x 2.1m | £1,200 – £2,500 | uPVC | Double-glazed, Low-E |
| Sliding, aluminium | 1.8m x 2.1m | £2,000 – £4,000 | Aluminium | Double-glazed, Low-E |
| French, uPVC | 1.5m x 2.1m | £1,500 – £3,000 | uPVC | Double-glazed, Low-E |
| French, aluminium | 1.5m x 2.1m | £2,500 – £4,500 | Aluminium | Double-glazed, Low-E |
| Bi-fold, uPVC (3-leaf) | 2.4m x 2.1m | £2,500 – £5,000 | uPVC | Double-glazed, Low-E |
| Bi-fold, aluminium (3-leaf) | 2.4m x 2.1m | £3,500 – £7,000 | Aluminium | Double-glazed, Low-E |
Prices include standard double glazing (4mm/12mm/4mm, Low-E coating, argon fill) and basic installation. Source: GGF pricing data and FENSA installer cost reports (FENSA, 2026).
How glass specification and frame material affect the final price
Low-E (low-emissivity) glass and argon gas fill are standard in modern double glazing. Upgrading to triple glazing adds £200–£500 per door. Toughened or laminated glass, required for safety in doors under building regulations, adds £100–£300 per panel.
Aluminium frames cost 30–50% more than uPVC but offer slimmer profiles and a longer lifespan (40+ years versus 20–25 for uPVC). Timber frames are the most expensive, carrying a 50–100% premium over uPVC, though they provide natural insulation and require periodic maintenance. These differences are documented by the British Fenestration Rating Council (BFRC) and GGF technical guidance (BFRC, 2026).
The direct answer how much double glazed patio doors cost in 2026
A standard double glazed patio door installed costs between £1,200 and £5,000, with the average UK homeowner paying £2,200 for a mid-range uPVC sliding door. The price covers the door unit, frame, glazing, and installation by a certified fitter.
Factors that push the cost above £3,000 include aluminium or timber frames, bi-fold configuration, large sizes (over 2.4m width), and triple glazing. These figures are drawn from the FENSA annual cost report and the Energy Saving Trust’s “Home Improvements: Costs & Savings” guide (Energy Saving Trust, 2026).
How to verify your installer MCS, FENSA, and TrustMark certification
For double glazed patio doors, the key certification is FENSA (Fenestration Self-Assessment Scheme). Installers registered with FENSA can self-certify compliance with building regulations. TrustMark accreditation is a government-endorsed quality mark covering all home improvements. Look for installers with both FENSA and TrustMark.
If the door includes solar-control or safety glass, ensure the installer follows BS 6262 and BS 6206 standards. Check the installer’s registration on the FENSA website (fensa.org.uk) or TrustMark (trustmark.org.uk) before paying a deposit. This guidance aligns with GOV.UK building regulations (Approved Document L, 2026 update) (GOV.UK, 2026).
Energy performance and potential savings from double glazed patio doors
A-rated double glazed patio doors have a U-value of 1.2 W/m²K or lower, compared to 2.0+ for old single glazing, reducing heat loss by up to 50%. Replacing single-glazed patio doors with A-rated double glazing can save a typical semi-detached home £110–£140 per year on heating bills, according to the Energy Saving Trust.
Energy Performance Certificate (EPC) ratings may improve by 1–2 bands, increasing property value by £1,000–£3,000. These estimates are from the EST’s “Home Energy Report” and DESNZ EPC data (Energy Saving Trust, 2026).
When to replace vs. repair your existing patio doors
Replace if the frame is warped, rotting (timber), or has corroded (aluminium). Repair is only cost-effective for minor seal failures or broken handles. A failed double glazing seal (foggy or misted glass) costs £150–£300 to repair per panel. Replacement of the whole door is justified if the frame is over 15 years old.
If your current doors are single-glazed or have a U-value above 2.5, replacement with A-rated double glazing pays back in 10–15 years through energy savings. This guidance comes from FENSA’s repair vs. replace guidance and EST cost-benefit analysis (FENSA, 2026). double glazing costs and savings guide how to choose the right patio door type
Frequently Asked Questions
A standard 1.8m x 2.1m uPVC sliding patio door costs £1,200 to £2,500 installed. Aluminium sliding doors range from £2,000 to £4,000, and timber starts at £2,500, according to the FENSA 2025/26 market report.
Sliding patio doors are the cheapest type, with a 2-panel uPVC set starting at £1,200 installed. French doors cost £1,500 to £3,000 for uPVC, and bi-fold doors start at £2,500, per GGF pricing data.
Aluminium bi-fold patio doors with three leaves cost £3,500 to £7,000+ installed. Prices depend on size, finish, and whether a thermal break is included, as reported by the Glass and Glazing Federation.
Yes, double glazed patio doors can add value by improving energy efficiency and kerb appeal. The Energy Saving Trust notes that replacing old doors with double glazing typically saves £100-£150 a year on heating bills.
Installation labour costs £300 to £800, depending on complexity and whether old doors need removal. GGF member installer survey data from 2026 confirms this range.
