- Postcode district
- CR5
- 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
- Purley, Carshalton, Sutton
- Building rules
- England
What replacement sliding doors offer homes in Coulsdon
These are the points a surveyor will go through with you when you choose replacement sliding doors for a home in Coulsdon:
If your Coulsdon home still has its original sliding patio door, look at the glass beads: if they are on the outside, a replacement will close off that weakness.
Considering a wider door for your Coulsdon home while you are replacing it? Weigh up the extra cost of structural work against the gain in glass before deciding.
- A thermally broken frame with modern double glazing must achieve 1.4 W/m²K or better in England for a door in an existing home with more than 60% glazing, which is far better than most old sliders.
- 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.
- 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.
Sunlight, glass and orientation in Coulsdon
The midday sun over Coulsdon ranges from about 15° at the winter solstice to about 62° at midsummer. Low-angle winter light reaches further into a room through a tall door, which is one reason taller panels are worth considering; on south or west walls, pair them with solar-control glass.
What should you budget for replacement sliding doors in Coulsdon?
Use these guide prices to budget. They include VAT, fitting and taking away an old door of a similar size. Taller doors, triple glazing and dual colour add to the figure — the online tool shows how much.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.5 m | 2 panels | £3,295–£4,095 |
| 1.8 m | 2 panels | £3,695–£4,495 |
| 3.6 m | 3 panels | £5,595–£6,895 |
See every size on the replacement sliding doors page or try the guide price tool.
Timescales for replacement sliding doors in Coulsdon
Surveys in the CR5 district are booked at a time that suits you. After you approve the quote, manufacture is typically 4–6 weeks for aluminium and 2–4 weeks for uPVC after survey sign-off; on fitting day the old door comes out, the new frame is set level and sealed, and the panels are adjusted so they glide properly. Fitting usually takes 1 day for a straight two-panel swap; 1–2 days for larger doors.
Rules for replacement sliding doors in England
English Building Regulations treat a new or replacement external door in an existing home as a controlled fitting: it needs a U-value of 1.4 W/m²K or better (or Doorset Energy Rating band C) if more than 60% of it is glazed (Approved Document L), and safety glass in a critical location (Approved Document K). Compliance is arranged through a competent person scheme installer or a Building Control notification, so you get a certificate for your records.
Specification choices for replacement sliding doors in Coulsdon
- New internal cill or board. A fresh window board or reveal lining to finish the inside neatly.
- Upgraded glass. Triple, laminated, solar-control or obscure glass to suit the elevation.
- uPVC replacement. A cost-conscious choice for a straightforward swap, available in white and foiled colours.
Questions about replacement sliding doors in Coulsdon
Do you fit replacement sliding doors in Coulsdon?
Yes. We survey and fit replacement sliding doors in Coulsdon and across Greater London, including nearby Purley and Carshalton. Start with a guide price online or call us, and we will arrange a free survey for a new or replacement door.
What happens to my old patio door?
We remove your old patio door and take it away for disposal as part of the job, and that is included in our guide prices, so there is nothing for you to arrange. If you would rather keep the old door, for example for a shed or greenhouse project, tell us before the fitting day and we will leave it safely on site.
Will the new door have a lower threshold?
A lower threshold may be possible on a replacement, depending on the floor level inside, the height of the patio or ground outside and how the opening was built. Low thresholds are typically 15–25 mm. A flush threshold needs a drainage channel outside so rain cannot run in. We check levels at survey and tell you what is realistic.
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.