- Postcode district
- SM5
- Survey
- Free for new and replacement doors
- Typical lead time
- Typically 4–6 weeks for aluminium and 2–4 weeks for uPVC after survey sign-off
- Guide price
- From £3,295 inc VAT
- Nearby
- Sutton, Mitcham, Morden
- Building rules
- England
Sliding door replacement in Carshalton: what to know
The right door depends on the opening, the room and the way you use the garden. Here is how replacement sliding doors tend to work out in practice:
If the existing opening in your Carshalton home is sound and a sensible size, simply replacing the door gives the biggest improvement for the least disruption.
Before booking a survey for a Carshalton flat, check your lease or title deeds and speak to the managing agent, factor or other owners, because doors in flats may need consent that houses do not.
- New rollers and a precision track make a heavy door glide with a light push, where an old door may need both hands and a firm shove to open.
- Certification through a competent person scheme installer, or notification to Building Control, is arranged as part of the job and gives you a record for when you sell.
- Slimmer modern frames often give a larger area of glass within the same opening, letting more daylight into the room than the old door did.
How much sun will a door in Carshalton get?
Daylight in Carshalton runs from about 7 h 51 min in December to 16 h 37 min in June, with the noon sun at roughly 15° and 62° respectively. Use that to choose your glass: standard low-E double glazing for north and east elevations, and consider solar-control or triple glazing for sunny south and west walls.
Sliding door replacement prices in Carshalton
These are guide prices for fitted doors at a standard height, including VAT. They run from an entry-level system to a premium one at the same size; the survey confirms which suits your opening.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.8 m | 2 panels | £3,695–£4,495 |
| 2.1 m | 2 panels | £3,995–£4,895 |
| 2.4 m | 2 panels | £4,295–£5,295 |
See every size on the replacement sliding doors page or try the guide price tool.
What happens when you order replacement sliding doors in Carshalton?
We plan the job around your home in Carshalton: survey first, then a written quote, then manufacture (typically 4–6 weeks for aluminium and 2–4 weeks for uPVC after survey sign-off). The fitting itself usually takes 1 day for a straight two-panel swap; 1–2 days for larger doors. If you are in Sutton or Mitcham, the same process and prices apply.
Do you need approval in Carshalton?
In England, a replacement sliding door is a controlled fitting under the Building Regulations. In an existing home, a door with more than 60% glazing must reach a U-value of 1.4 W/m²K or better (or a Doorset Energy Rating of band C) under Approved Document L, and glass in doors must be safety glazing under Approved Document K. We arrange compliance through a competent person scheme installer or by notifying Building Control, and you receive the certificate.
Choosing the specification
- uPVC replacement. A cost-conscious choice for a straightforward swap, available in white and foiled colours.
- Upgraded glass. Triple, laminated, solar-control or obscure glass to suit the elevation.
- Slimline upgrade. Narrow interlocks for the maximum glass area the existing opening allows.
Questions about replacement sliding doors in Carshalton
Do you fit replacement sliding doors in Carshalton?
Yes. We survey and fit replacement sliding doors in Carshalton and across Greater London, including nearby Sutton and Mitcham. Start with a guide price online or call us, and we will arrange a free survey for a new or replacement door.
Do I need building regulations approval to replace a patio door?
In England a replacement door is a controlled fitting, so it must meet the Building Regulations for energy and safety glazing. You do not apply in advance; instead the work is self-certified by a competent person scheme installer or notified to Building Control, which we arrange. In Scotland like-for-like replacement in a house usually needs no building warrant but must still meet the building standards.
Can I get a bigger door in the same opening?
You can usually get more glass in the same opening, because modern frames are slimmer, but the overall door size stays roughly the same as the old one. Making the door wider or taller means widening the opening, which is structural work with a steel beam, calculations and a Building Regulations application. Our new openings page covers that.
What if there is no proper lintel above my old door?
Occasionally an old door frame turns out to be carrying some load because the support above the opening is inadequate or missing. We check the head of the opening at survey and again when the old frame comes out. If extra support is needed, we explain why, what it involves and what it costs before any further work goes ahead.