- Postcode district
- AL5
- 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
- St Albans, Luton, Hemel Hempstead
- Building rules
- England
Why choose external pocket sliding doors in Harpenden?
The right door depends on the opening, the room and the way you use the garden. Here is how external pocket sliding doors tend to work out in practice:
For a Harpenden extension still at the drawing stage, planning the pocket wall now is far simpler than rebuilding a finished wall later.
If the only wall beside your Harpenden opening is shared with a neighbour, check the pocket design and any steel bearing on it early, as the Party Wall etc. Act 1996 (England and Wales) may apply.
- Parked inside the wall, open panels are protected from weather and knocks, and garden furniture can sit right up to the edge of the opening.
- A lined and drained pocket carries rainwater running along the track out of the wall, protecting the structure as well as the rollers.
- 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.
Daylight in Harpenden and what it means for your glass
In Harpenden the shortest day has roughly 7 h 46 min of daylight and the longest about 16 h 42 min. The noon sun sits near 15° above the horizon in winter and 62° in summer — so glass that faces south collects useful warmth from October to March, while a west-facing door may need solar control to stop it overheating in July.
Guide prices for external pocket sliding doors in Harpenden
These figures are for the door supplied and fitted, with the engineer's structural calculations, including VAT. They include forming the opening and the pocket in the wall; Building Control fees are set by your council and are extra. Your price is fixed in a written quote after survey.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.8 m | 1 panel | £6,595–£8,095 |
| 3.0 m | 2 panels | £8,395–£10,295 |
| 6.0 m | 3 panels | £12,895–£15,795 |
See every size on the external pocket sliding doors page or try the guide price tool.
What happens when you order external pocket sliding doors in Harpenden?
Here is the usual sequence in Harpenden: 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 St Albans, Luton and Hemel Hempstead.
Rules for external pocket sliding doors in England
A new or wider opening in England needs Building Control approval for the structural work as well as compliance for the door itself under Approved Documents L and K. Expect structural calculations, a steel beam and, where a party wall is involved, notices under the Party Wall etc. Act 1996.
Specification choices for external pocket sliding doors in Harpenden
- 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 Harpenden
How soon can you survey in Harpenden?
Surveys in the AL5 district are booked at a time that suits you, and we offer survey dates when we reply to your enquiry. After you approve the written quote, manufacture is typically 6–8 weeks from survey sign-off.
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.
How long does an external pocket door project take?
An external pocket door typically takes 6–8 weeks to make after survey sign-off, and the building work to form the opening and pocket typically takes 3–5 days before the door goes in. Fitting the door then takes 1–2 days. Engineer design and Building Regulations approval come first, so the whole project runs longer than a straight door swap.