Are sliding doors for new openings right for homes in West Sussex?
Before you settle on a door type, it helps to know what sliding doors for new openings do well and what to check before you order.
Living in a West Sussex flat? Structural changes to an external wall almost always need the agreement of the building's owner or the other owners, so speak to them first.
Turning a West Sussex kitchen window into a door to the garden? Check where drains, gullies and air bricks sit outside, because they can affect the new threshold.
- Making good the reveals and head after the steel goes in leaves a square, plumb opening, which is what a precision-made sliding door needs to run smoothly.
- A structural engineer sizes the steel beam and padstones for the actual loads above, so the opening is designed rather than guessed.
- Telling the engineer that a sliding door will sit beneath the beam lets them limit its deflection, which matters because a beam that sags can stop panels sliding freely.
Guide prices for sliding doors for new openings in West Sussex
Guide prices cover the door and forming the opening — steel beam, padstones, making good and structural calculations — fitted, including VAT. Building Control fees are set by your council and are extra.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.5 m | 2 panels | £6,595–£7,295 |
| 3.0 m | 2 panels | £8,795–£9,895 |
| 3.6 m | 3 panels | £9,695–£10,895 |
| 6.0 m | 4 panels | £13,295–£15,095 |
Every size is on the sliding doors for new openings page.
Daylight and glass in West Sussex
Sun angles matter for big glazed doors. Around West Sussex, midday sun reaches about 63° in summer and drops to about 16° in winter. That low winter sun is free heat through south-facing glass; high summer sun is easier to shade with a roof overhang, and solar-control glass helps where there is none.
Towns we cover in West Sussex
We survey and fit sliding doors for new openings in 14 towns across West Sussex, including the BN11, BN17, BN18, BN43, GU28, GU29 postcode districts.
Approvals in England
A new or wider opening in England needs Building Control approval for the structural work as well as compliance for the door itself under Approved Documents L and K. Expect structural calculations, a steel beam and, where a party wall is involved, notices under the Party Wall etc. Act 1996.
Questions about sliding doors for new openings in West Sussex
Do I need building approval for sliding doors for new openings in West Sussex?
In England a replacement door is a controlled fitting, so compliance is arranged through a competent person scheme installer or Building Control; new openings need a Building Regulations application. We confirm the right route for your property at survey, so the paperwork is in place before fitting.
How much does it cost to widen an opening for sliding doors?
Our guide price for forming or widening an opening is £3,595 for 2.4 m and £4,495 for 4.8 m, covering steel, padstones, making good and structural calculations. The door is priced separately, and Building Control fees are set by your council. All figures are guide prices inc VAT, fixed in a written quote after we survey the wall and see what is above it.
Do I need planning permission for a new opening?
Planning rules for altering an elevation depend on the property and where you are, so it is worth checking with your council before you commit. Flats, listed buildings and properties covered by an Article 4 direction are the most likely to need consent. Wales and Scotland have their own planning rules. Our planning guide sets out the questions to ask.
Do I need building regulations to widen a door opening?
Yes, forming or widening an opening is structural work and needs a Building Regulations application in England, supported by structural calculations. Building Control inspects the work, typically including the steel and its bearings. In Scotland a building warrant is needed. Wales and Northern Ireland follow their own building regulations through local authority or district council building control.