Show mobile menu
Show search control
Show search control
Search Site


Side roofs in terraced houses

Request Description

Please answer these Freedom of Information questions:

Questions on the Town and Country Planning (General Permitted Development) (England) Order 2015 in Schedule 2, Part 1, Class B, hereinafter referred to as "GPDO", relating to the "side roof" (first floor attic / rear of the property roof slope/s) Not "main roof" (the highway parallel roof / roof slopes) of Terraced houses

1. Does GPDO legislation deal only with "main roof" (the highway parallel roof / roof slopes) in terraced houses or does it also deal also with pitched "side roofs" (first floor attic / rear of the property roof slope/s) in terraced houses?

2. Does there have to be pre-existing internal space (loft space / roof space) between the pitched "side roof" (not talking here about main highway facing roof) in a terraced house and the underneath first floor ceiling, to carry out loft conversion under the GPDO legislation?

3. In other words to question 2, does the GPDO legislation intend that there has to be pre-existing internal space (loft space / roof space) living and habitable space "capital" for it to be made more convenient and functional by loft conversion of pitched "side roofs" in terraced houses?

4. If there is no or hardly any living and habitable space, and all there is ceiling and tiled "side roof" or only space for loft insulation in "side roof" in a terraced house and therefore a "raised platform" is put on top of the external pitched roof where the roof tiles sit to place on it a "side roof" dormer, is this allowed by the GPDO legislation?

5. With reference to question 4, does building control legislation (not talking here about GPDO legislation) allow "raised platforms" to be placed externally on top of "side roofs" in terraced houses and screwed down to external roof base rafters and external roof base battens meant for placing roof tiles on?

6. With reference to your answers to questions 4 and 5 about "raised platforms", does it make any difference to your answers in relation to building control or GPDO legislation, if "raised platform" is placed on "side roof" with pair of roof slopes (apex in the middle) or 1 roof slope in a terraced house?

7. Do building regulations or GPDO legislation allow for in terraced houses see-saw type base board on the apex ridge (if there's pair of roof slopes) on top of the external "side roof" in the "raised platform's" construction with left base and right base of the "raised platform" being used to stop the see-saw type base from tilting?

8. The GPDO legislation says, "any part of the dwelling house would, as result of the works, exceed the height of the highest part of the existing roof", does "existing roof" mean "existing roof slope" height immediately at site of the loft conversion construction when height gets decided, for example, if site is on "side roof" then the smaller height "side roof" in a terraced house height or does it mean taller height "main roof" (the highway parallel roof / roof slopes) which is not the immediate site? I ask this question because I imagine loft conversion applicant cannot put a big box dormer the size of "main roof" on a smaller height "side roof". Imagine this example, a church steeple style roofed house with a short side roof and a dormer as high as the steeple, it would not be proportionate to the side roof.

9. The GPDO legislation says, "the cubic content of the resulting roof space would exceed the cubic content of the original roof space by more than - (i) 40 cubic metres in the case of a terrace house", thus here "roof space" means the filling between the external roof and the ceiling, however, please inform if "original" means "existing roof" (seen in question 8 GPDO legislation quote) of the immediate site of loft conversion construction, for example, if site is in terraced house "side roof" then is it the lesser cubic metres of "side roof" or does it mean more cubic metres "main roof" (the highway parallel roof / roof slopes)? By the way, this is also related to question 8.

10. The GPDO legislation says, "raised platform", does this means open-to-air structure or can it also mean "raised platform" with "closed structure"? I ask this question because in same place of GPDO legislation there are these words, "consist", "include", "construction" and "provision" and so if "raised platform" has "closed structure" built on it and thus becomes hidden, it nevertheless gets amplified in a terraced house externally.

Request Date17 October 2016
Requested byIndividual
Released Date    





18 October 2016

RefusalThis request is not for recorded information, and as such will not be treated as a valid Freedom of Information Request.