- Postcode district
- SE3
- Survey
- Free for new and replacement doors
- Typical lead time
- Typically 6–8 weeks from survey sign-off
- Guide price
- From £6,595 inc VAT
- Nearby
- Lewisham, Greenwich, Catford
- Building rules
- England
Are external pocket sliding doors right for your Blackheath home?
Before you settle on a door type, it helps to know what external pocket sliding doors do well and what to check before you order.
If the wall beside your Blackheath patio opening is free of windows, radiators and sockets, it may be long enough to take a pocket so the panels disappear completely.
For a Blackheath extension still at the drawing stage, planning the pocket wall now is far simpler than rebuilding a finished wall later.
- When closed, a pocket door looks like a large-paned slider, with slim meeting stiles and plenty of glass instead of the many frames of a folding door.
- With every panel slid into the wall, the full width of the opening is clear, so the room and terrace join without a fixed panel in the way.
- Open panels are hidden inside the wall rather than stacked in view, keeping the opening clean-lined compared with a bifold stack at one side.
Daylight in Blackheath and what it means for your glass
At the latitude of Blackheath, the midday sun climbs to about 62° in late June but only about 15° in late December, when daylight lasts around 7 h 50 min against 16 h 38 min in midsummer. A south-facing external pocket sliding door lets that low winter sun deep into the room; on a west or south elevation, solar-control glass keeps summer afternoons comfortable.
What should you budget for external pocket sliding doors in Blackheath?
Pricing does not change because you are in Blackheath: the ranges below include fitting, structural calculations and VAT. They include forming the opening and the pocket in the wall; Building Control fees are set by your council and are extra.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.8 m | 1 panel | £6,595–£8,095 |
| 4.0 m | 2 panels | £9,895–£12,095 |
| 4.8 m | 3 panels | £11,095–£13,595 |
See every size on the external pocket sliding doors page or try the guide price tool.
From survey to fitted door in Blackheath
Here is the usual sequence in Blackheath: guide price, free survey, written quote, any building work, then manufacture (typically 6–8 weeks from survey sign-off). Fitting typically takes 3–5 days of building work to form the opening and pocket, then 1–2 days to fit the door. Nearby, we also survey in Lewisham, Greenwich and Catford.
Rules for external pocket sliding doors in England
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.
Options to consider for your external pocket sliding door
- Threshold. Low or flush thresholds, with the external drainage channel continuing past the pocket.
- Internal finish. Plastered, panelled or tiled finishes on the pocket wall, with the access panel set discreetly into it.
- Colours. Single or dual colour powder coating, so the exposed edge of the panel matches the frame inside and out.
Questions about external pocket sliding doors in Blackheath
Do I need building approval for external pocket sliding doors in Blackheath?
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 do external pocket sliding doors cost?
External pocket sliding doors start from a guide price of £6,595 for a 1.8 m single-panel door, fitted, inc VAT, at standard 2.1 m height, including forming the wall pocket. A 3 m two-panel door is a guide £8,395–£10,295, and a 6 m three-panel door is around £12,895. Wall construction, glass and finish affect the figure, which is fixed in a written quote after survey.
Does a pocket in the wall cause heat loss?
A pocket in the wall does not have to cause significant heat loss if it is insulated, lined and sealed as part of the design, and the door itself typically achieves whole-door U-values around 1.2–1.6 W/m²K double glazed. In England, a new door in an existing home with more than 60% glazing must achieve 1.4 W/m²K or better. Wales, Scotland and Northern Ireland have their own energy rules.
Do external pocket doors need Building Regulations approval?
External pocket doors need Building Regulations approval in England, because forming the opening and pocket is structural work needing an application, structural calculations (included in our guide prices), and usually a steel beam or lintel. If the steel bears on a party wall, the Party Wall etc. Act 1996 (England and Wales) may apply. Scotland needs a building warrant; Wales and Northern Ireland have their own building control rules.