Bi-fold & Sliding Door Cost Calculator — UK Prices 2025
Bi-fold Doors Cost Calculator
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How much does bi-fold doors cost in the UK?
Use our calculator above to get an accurate estimate based on your specific requirements. Prices are based on real quotes from UK tradespeople and updated quarterly.
What affects the cost of bi-fold doors?
- Location: London and the South East are 15–40% more expensive than the national average.
- Size and complexity: Larger or more complex jobs cost proportionally more.
- Material quality: Budget, mid-range and premium specifications can vary by 2–3x.
- Time of year: Demand peaks in spring and summer — book in winter for better availability and pricing.
- Access: Difficult access (scaffolding, confined spaces) adds to labour costs.
How to save money on bi-fold doors
- Get at least 3 quotes from different tradespeople.
- Book during quieter periods (January–March for most trades).
- Be flexible on start dates — tradespeople often discount for convenient scheduling.
- Supply your own materials where possible (but confirm with your tradesperson first).
- Combine jobs — having multiple trades on site at once can reduce overall costs.
How to find a good tradesperson
Always check reviews on Checkatrade, Rated People or MyBuilder. Ask for references from recent similar jobs. Ensure they are appropriately qualified and insured. Never pay the full amount upfront — a deposit of 10–25% is standard.
Frequently asked questions
How much do bi-fold doors cost in the UK?
Aluminium bi-fold doors cost £2,000–£6,000 for a 3-panel set (2.4m wide). A 4-panel set costs £3,000–£8,000. uPVC bi-folds cost £1,500–£4,000. Timber bi-folds cost £3,000–£10,000.
What is the difference between bi-fold and sliding doors?
Bi-fold doors fold back on themselves, stacking to one or both sides. Sliding doors slide on a track. Bi-folds open up more of the aperture but require more clearance space. Sliding doors are better for tight spaces.
How long does bi-fold door installation take?
Installing bi-fold doors takes 1–2 days. This includes removing the existing door or wall opening, fitting the frame, hanging the doors and adjusting the hardware.
Do bi-fold doors need planning permission?
No, replacing existing doors or windows with bi-folds does not require planning permission. If you are creating a new opening in a wall, you may need Building Regulations approval for the structural lintel.
Are aluminium bi-fold doors better than uPVC?
Aluminium bi-folds have slimmer frames (better views), are more durable, and look more premium. uPVC is cheaper and has good thermal performance. For most homeowners, aluminium is worth the extra cost for the aesthetics and longevity.