Are bi-fold or sliding doors better?
Bi-folds fold completely to one side, maximising the opening. Sliding doors offer better thermal performance and are quieter, but only open 50–66% of the width. Choose bi-folds for full garden access.
How Much Do Bi-Fold Doors Cost in 2026?
Bi-fold doors create a seamless connection between your home and garden. They are a popular choice for kitchen extensions and open-plan living spaces. In 2026, expect to pay between £2,500 and £8,000 depending on size and material.
Typical UK range:£2,500 – £8,000
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Budget£2,500 – £3,500
uPVC bi-fold doors, 2–3 panels. Good thermal performance at the lowest price point.
Mid-Range£3,500 – £6,000
Aluminium bi-fold doors, 3–4 panels. Slim sightlines and modern aesthetics.
Premium£6,000 – £8,000+
Aluminium or timber, 4–5+ panels, triple glazing, integrated blinds.
Factors That Affect the Cost
- Number of panels and opening width
- Frame material (uPVC, aluminium, timber)
- Glass specification (double or triple)
- Threshold type (standard or low)
- Structural lintel requirements
Regional Price Variations
Installation costs are 10–20% higher in London. Material costs are consistent nationwide, but structural work (new lintels) varies by property type.
Frequently Asked Questions
Do bi-fold doors need planning permission?
Replacing existing doors or windows with bi-folds doesn't usually need planning permission. New openings in walls may require Building Regulations approval for structural work.
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