Doors
French doors
French doors cost roughly £1,200 to £2,950 fitted. They are a pair of hinged doors that open from the centre, usually outwards. For openings up to about two metres they are cheaper and simpler than sliding or bi-fold doors and need no track or running gear.
For a standard patio opening, French doors are often the sensible answer that nobody suggests because they are not the expensive option.
Indicative guide, not a quote
per door, supplied and fitted
£1,200 – £2,950
These figures come from published industry price guides, not official statistics, and several of those sources are installers or comparison sites with a commercial interest. They are a starting point for a conversation, not a quote. Your installer sets the actual price after measuring.
MyJobQuote door installation cost guides · checked 2026-10-09
The right size of opening
French doors work best up to around 1.8 to 2 metres. Beyond that each leaf becomes large and heavy, swings a long way, and catches the wind.
If the opening is wider, you can add fixed sidelights either side of the pair to fill it while keeping the doors a sensible size. That is usually cheaper than moving to a bi-fold and keeps the simplicity.
Which way they should open
Outward-opening is the UK default and keeps the floor clear inside, but the leaves need somewhere to go and will catch a gust. Inward-opening weathers better in an exposed position but costs you floor space and dictates where furniture goes.
Walk the space before deciding. This is the choice people most often regret.
No running gear to wear out
The practical argument for French doors is that there is nothing to go wrong. No rollers, no track to fill with grit, no folding hardware. Hinges and a multi-point lock, the same as any other door.
Over fifteen years that is a meaningful difference in how much attention the doors need.
French doors: common questions
- Are French doors secure?
- A good pair uses multi-point locking on the master leaf and shootbolts top and bottom on the slave leaf. Specify an anti-snap cylinder and laminated glass, and they are as secure as any other door.
- Should French doors open in or out?
- Outward is the UK norm and keeps internal floor space free. Inward weathers better on an exposed elevation. Consider wind, the space outside and the furniture inside before choosing.
- Are French doors cheaper than bi-folds?
- Usually substantially, because there is no folding hardware or track. For an opening of around two metres they often give a better result for considerably less money.
Other doors
- Start here
Front doors
A new front door costs £700 to £2,800 fitted.
£900 – £2,350
fitted, guide only
- The usual recommendation
Composite doors
Composite doors cost £900 to £2,350 fitted.
£900 – £2,350
fitted, guide only
- Budget and back doors
uPVC doors
uPVC doors cost £700 to £1,400 fitted.
£700 – £1,400
fitted, guide only
- Tall and heavily glazed
Aluminium doors
Aluminium doors cost £1,400 to £2,800 fitted.
£1,400 – £2,800
fitted, guide only
- Opens the full width
Bi-fold doors
Aluminium bi-fold doors cost £3,000 to £7,500 fitted.
£3,000 – £7,500
fitted, guide only
- Biggest uninterrupted pane
Sliding patio doors
Sliding patio doors cost £1,500 to £4,000 fitted.
£1,500 – £4,000
fitted, guide only
TrustedGlazing does not make, supply or fit windows and doors, and the prices above are published industry guides rather than our own. We match your enquiry to one local installer, who quotes and contracts with you directly.