- Postcode district
- DA14
- 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
- Chislehurst, Bexley, Eltham
- Building rules
- England
What replacement sliding doors offer homes in Sidcup
A few practical points decide whether replacement sliding doors suit a particular room and opening:
Before booking a survey for a Sidcup 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.
Considering a wider door for your Sidcup home while you are replacing it? Weigh up the extra cost of structural work against the gain in glass before deciding.
- 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.
- Removal and disposal of your old patio door is included in our guide prices, so there is no separate skip or tip run to organise.
Daylight in Sidcup and what it means for your glass
The midday sun over Sidcup 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.
Guide prices for replacement sliding doors in Sidcup
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) |
|---|---|---|
| 2.4 m | 2 panels | £4,295–£5,295 |
| 3.6 m | 3 panels | £5,595–£6,895 |
| 6.0 m | 4 panels | £8,295–£10,095 |
See every size on the replacement sliding doors page or try the guide price tool.
Survey, manufacture and fitting around Sidcup
We plan the job around your home in Sidcup: 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 Chislehurst or Bexley, the same process and prices apply.
Do you need approval in Sidcup?
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.
Which options matter for replacement sliding doors?
- Aluminium replacement. A thermally broken aluminium slider with slim frames and a durable powder-coat finish.
- Slimline upgrade. Narrow interlocks for the maximum glass area the existing opening allows.
- Lower threshold. A reduced-height sill where floor and outside levels allow, with suitable drainage.
Questions about replacement sliding doors in Sidcup
Is the price different in Sidcup?
No. Guide prices for replacement sliding doors are the same across mainland Britain, including Sidcup. The fitted price depends on size, system, glass and finish, and any structural work, all fixed in your written quote after survey.
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.
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.
How long does it take to replace a sliding patio door?
Replacing a two-panel sliding patio door typically takes one day, from removing the old door to sealing and trimming the new one. Larger doors, three- or four-panel sets and doors needing extra making good typically take one to two days. Manufacture comes first, typically 4–6 weeks for aluminium or 2–4 weeks for uPVC after you sign off the surveyed specification.