- Postcode district
- KT3
- Survey
- Free for new and replacement doors
- Typical lead time
- Typically 4–6 weeks for the door after the opening is measured; building work scheduled around approvals
- Guide price
- From £6,595 inc VAT
- Nearby
- Kingston upon Thames, Surbiton, Wimbledon
- Building rules
- England
Why choose sliding doors for new openings in New Malden?
Most homeowners choosing sliding doors for new openings want the same things: more light, a clear view and a door that is easy to live with.
For homes in New Malden that are listed or covered by an Article 4 direction, ask the council about the new opening before paying for structural calculations.
Turning a New Malden kitchen window into a door to the garden? Check where drains, gullies and air bricks sit outside, because they can affect the new threshold.
- A structural engineer sizes the steel beam and padstones for the actual loads above, so the opening is designed rather than guessed.
- Widening a standard patio opening to a larger span can transform how a room connects to the garden, giving a wall of glass rather than a doorway.
- The door is measured from the finished opening rather than from drawings, so it fits the opening as built, not as it was intended to be built.
Daylight in New Malden and what it means for your glass
Because New Malden sees long summer days (about 16 h 37 min) and short winter ones (about 7 h 51 min), the elevation your door faces makes a real difference. With the midday sun at about 15° in winter, a south-facing door brings light well into the room; a west-facing door catches hot late-afternoon sun in summer.
What should you budget for sliding doors for new openings in New Malden?
Use these guide prices to budget for the whole job in New Malden: the door, the steelwork, making good and the engineer's calculations, including VAT. Building Control or warrant fees are charged by the council on top.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 3.6 m | 3 panels | £9,695–£10,895 |
| 4.8 m | 4 panels | £11,495–£12,995 |
| 6.0 m | 4 panels | £13,295–£15,095 |
See every size on the sliding doors for new openings page or try the guide price tool.
How fitting works in New Malden
Here is the usual sequence in New Malden: guide price, free survey, written quote, any building work, then manufacture (typically 4–6 weeks for the door after the opening is measured; building work scheduled around approvals). Fitting typically takes 3–5 days of building work, then 1–2 days to fit the door. Nearby, we also survey in Kingston upon Thames, Surbiton and Wimbledon.
Do you need approval in New Malden?
In England, forming or widening an opening is structural work that needs a Building Regulations application, structural calculations and usually a steel beam on padstones. The new door is also a controlled fitting (U-value 1.4 W/m²K or better if more than 60% glazed). If steelwork bears on a party wall, the Party Wall etc. Act 1996 may apply.
Specification choices for sliding doors for new openings in New Malden
- Temporary door or boarding. A secure, weathertight closure while the made-to-measure door is being manufactured.
- Steel beam with padstones. A beam sized by the engineer to carry the wall, floors and roof above.
- Concealed steel. Setting the beam so it sits above the ceiling line, giving a cleaner head detail inside.
Questions about sliding doors for new openings in New Malden
Do I need building approval for sliding doors for new openings in New Malden?
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.
Why does beam deflection matter for sliding doors?
Beam deflection matters because a sliding door needs a straight, level head to run properly. Every beam bends slightly under load, and if it bends too much the frame can be squeezed, making panels stiff or causing them to bind. Telling the structural engineer that a large sliding door will go underneath allows them to design a stiffer beam.
Do I need a steel beam for sliding doors?
A widened or new opening usually needs a steel beam or a suitable lintel to carry the wall and anything above it, and for wider openings a steel beam is the usual answer. A structural engineer chooses the size and bearing details based on the loads. The beam is placed on padstones at each end to spread its load into the masonry.
Can you turn a window into a sliding door?
Yes, a window opening can usually be extended down to the floor and often widened to take a sliding door. The work involves removing the masonry below the window, forming a new threshold, and fitting a steel beam or lintel if the opening is widened. Drains, air bricks and floor levels outside need checking, and the work needs a Building Regulations application.