Max Height For Exempted Single Storey Extension

strongback

With single storey rear extensions that are exempt from planning is there any limit on the height of the roof of the single storey extension?

Can the roof of the single storey extension be built up to eaves level of the existing house?

Poor Uncle Tom

In relation to height:

. (a) Where the rear wall of the house does not include a gable, the height of the walls of any such extension shall not exceed the height of the rear wall of the house.

(b) Where the rear wall of the house includes a gable, the height of the walls of any such extension shall not exceed the height of the side walls of the house.

(c) The height of the highest part of the roof of any such extension shall not exceed, in the case of a flat roofed extension, the height of the eaves or parapet, as may be appropriate, or, in any other case, shall not exceed the height of the highest part of the roof of the dwelling.

Taken from:

http://www.irishstatutebook.ie/2001/en/si/0600.html#sched2

strongback

Poor Uncle Tom wrote: »

In relation to height:



Taken from:

http://www.irishstatutebook.ie/2001/en/si/0600.html#sched2

Reading the link it sort of looks like the flat roof to eaves level or the pitched roof to existing house ridge height level relates to two storey extensions although it does not expressly state this.

As an example have you seen any single storey extensions with a pitched roof that extends up to the overall height of the existing roof ridge level?

This would surely throw up some issues of overshadowing neighbours etc particularly in a terraced house situation.

I'm a bit confused by this. Is there room here for a planner to make their own interpretation?

strongback

Reading the below from the regulations could above ground floor extensions be interpreted as including the extension roof?

3. Any above ground floor extension shall be a distance of not less than 2 metres from any party boundary.

Poor Uncle Tom

strongback wrote: »

Reading the link it sort of looks like the flat roof to eaves level or the pitched roof to existing house ridge height level relates to two storey extensions although it does not expressly state this.

As an example have you seen any single storey extensions with a pitched roof that extends up to the overall height of the existing roof ridge level?

This would surely throw up some issues of overshadowing neighbours etc particularly in a terraced house situation.

I'm a bit confused by this. Is there room here for a planner to make their own interpretation?

It's relatively straightforward.

In relation to an exempted single storey extension to the rear of a two storey terraced house, the walls can be built up to the eaves level of the existing house but who would want to have a floor to ceiling height of approximately 5m with the added cost of building the unnecessary blockwork, insulation, plastering, rendering. Also continually heating the unnecessary room volume, etc.

If the extra height in the walls is put in place with the view of putting in another floor at a later date (very hard to prove) there should be some tell-tell signs, the enforcement department might be interested in hearing about.

Poor Uncle Tom

strongback wrote: »

Reading the below from the regulations could above ground floor extensions be interpreted as including the extension roof?

3. Any above ground floor extension shall be a distance of not less than 2 metres from any party boundary.

Walls and roof associated with an upper floor, not the roof of a ground floor.

strongback

Poor Uncle Tom wrote: »

It's relatively straightforward.

In relation to an exempted single storey extension to the rear of a two storey terraced house, the walls can be built up to the eaves level of the existing house but who would want to have a floor to ceiling height of approximately 5m with the added cost of building the unnecessary blockwork, insulation, plastering, rendering. Also continually heating the unnecessary room volume, etc.

If the extra height in the walls is put in place with the view of putting in another floor at a later date (very hard to prove) there should be some tell-tell signs, the enforcement department might be interested in hearing about.

Thanks for that. It might seem strange to build the walls of a single storey extension up to eaves level but I saw exactly that on a terraced house during the week. The extension has a mono pitched roof that slopes in the direction of party wall to party wall. The high side of the roof is built up to eaves level.

I thought the extension seriously overshadowed his neighbour. I'm just curious about it because it just looks wrong as an exempted extension.