Bifold doors are glazed panels that fold and stack to one side to open up a wide gap, while sliding doors glide past each other on tracks; both connect a living space to the garden and bring in more daylight.
Homes across Cornwall vary a great deal, so we price bifold or sliding doors only after seeing the property. Our coverage takes in Redruth, Falmouth, St Austell and Truro and the surrounding districts. As a guide, expect £3,100–£8,200 including VAT in the South West; the final figure depends on size, materials and access. Any permissions are checked against the rules for England before we quote.
- Guide price
- £3,100–£8,200 inc VAT
- Time on site
- 1–2 days to fit into a ready opening
- Planning rules
- England
- Price level
- About 2% above the national guide
- Towns listed
- 7
- Survey
- Free, with a written quote
How much do bifold or sliding doors cost in Cornwall?
What will bifold or sliding doors cost in Cornwall? Our guide range is £3,100–£8,200 including VAT. That figure is adjusted for the South West, about 2% above the national guide, and is intended for planning a budget. A firm written price for your chosen specification follows a free survey at your home.
| Type of job | What it usually involves | Guide in Cornwall |
|---|---|---|
| uPVC sliding or French doors | Standard uPVC doors fitted into an existing opening of up to about 2m. | £1,550–£3,100 |
| 3m aluminium bifold | A three-panel aluminium bifold in a standard colour, fitted into a ready opening. | £3,600–£7,100 |
| Wide bifold or slimline slider | Openings of 4m or more and slim-frame doors, often with a new steel above. | £7,100–£14,500 |
What moves the price up or down:
- Frame material: uPVC, standard aluminium or slimline aluminium
- Glazing upgrades such as solar control or triple glazing
- Widening the opening with a new steel beam
- Threshold type, colour choice and built-in blinds
What’s included?
- Measured survey of the opening, lintel and floor levels
- Toughened double glazing as standard, with solar control options
- Level or low threshold options to suit your patio
- Opening widened with a new lintel or steel where agreed
- Weather seals, cills and internal trims finished neatly
- Building regulations sign-off arranged for the new doors
Homes in Cornwall
Older Cornish homes are often built of granite or slatey local stone, with slate roofs and sometimes slate-hung walls facing the weather. Cob cottages survive in places, Truro and Falmouth keep Georgian and Victorian streets, and many towns have rendered post-war houses, bungalows and newer estates on their edges.
Stone and cob properties often need breathable lime render, careful repointing and roof repairs. Post-war and newer homes commonly benefit from new windows, roofline renewal, external rendering and single-storey extensions.
Cornwall faces Atlantic gales, driving rain and salt-laden air, so render, pointing and window hardware on exposed elevations need a suitably robust specification.
Do you need permission in Cornwall?
Planning law differs across the UK. For a home in Cornwall, it is the England rules below that count, and we check them with the council ahead of any quote.
Replacing windows and doors on a house is usually permitted development in England when the new ones look broadly similar to the old. Flats, listed buildings and homes covered by an Article 4 direction can need consent, and conservation areas may limit materials or styles.
Replacement windows and external doors must meet Building Regulations for energy efficiency, ventilation and, on upper floors, escape. The work is either self-certified by an installer registered with a competent person scheme or signed off by building control.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
The four stages
A visit to your home
Book a visit and we'll come to you. The survey covers measurements, the state of what's there now and any obvious constraints, so the price that follows is based on your actual home, not an average.
Price and scope agreed
We turn the survey notes into a written quote. The price is fixed for the specification we agree, and the document sets out materials, scope and payment stages in plain language.
Getting ready
Next comes planning the work itself. We set a start date that suits you, line up the right trades, and make sure any approvals for bifold or sliding doors are in place before the first day on site.
The work itself
The work is carried out to the agreed specification, with floors and furniture protected and the site kept tidy. At the end we clean up, walk through the finished job with you and hand over any certificates.
What you can expect from us
Questions about bifold or sliding doors in Cornwall
Can you fit bifold doors where I have a window now?
Bifold doors can usually replace a window by cutting the wall down to floor level and, if the opening is being widened, fitting a new lintel or steel beam. A structural engineer sizes the beam, and building control approval is needed. Radiators, pipes and cables under the window may need moving. We check all of this at the survey and include it in a single written quote.
Should I choose bifold or sliding doors?
Bifold doors suit you if you want to open the whole width to the garden, because the panels fold and stack to one side. Sliding doors suit you if you mainly want the view, because they have fewer, larger panes and slimmer frames, though only part of the width opens. Sliding doors also take up no room when open. We help you weigh up how you will use the space in summer and winter.
How much do bifold doors cost?
Bifold doors cost £3,100–£8,200 for a typical 3m opening, supplied and fitted. As a rough guide, allow around £900–£2,000 per metre of width plus the fixed costs of fitting, depending on frame material and glass. uPVC sits at the lower end and slimline aluminium at the top. Widening the opening with a new steel adds to the price. We confirm a fixed figure after measuring.
Can I stay at home during the work?
In most cases, yes. Most people can live at home throughout, and we plan the work to keep disruption down by protecting floors, agreeing working hours and keeping access routes clear. Bigger jobs affecting kitchens, bathrooms or heating may mean a short spell with reduced facilities, and we talk this through with you at the survey.
Do you cover Redruth, Falmouth and St Austell?
Yes. As well as Cornwall, we cover Redruth, Falmouth and St Austell and the rest of Cornwall. Our coverage is UK-wide, so the process is the same wherever you are: a free site survey, a quote in writing that fixes the price for the agreed scope, and one point of contact while the work is planned and carried out.
Towns in Cornwall
Choose your town from the list to see how we price and plan bifold or sliding doors in your part of Cornwall, including typical time on site.