Advice on a double story side and rear extension

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Hello,

I am wanting to do a double story side extension above the garage which will have a gable end on the side but i also want to do a double story rear extension on the back of that and a bit on the back of the original house but i can't seem to come up with a good way to do the roof.

Any advice please would be appreciated.
 

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I imagine building further out the back will be a bit of a mare, but you’ll just end up with a t-shaped roof like mine with the side extension connected to the roof

(The triangle on the left is the valley that connects to your existing roof)
FBDC9522-EBFD-40D3-829B-2F2CDA0E9698.jpeg


A37D8828-5697-45F0-A384-41932FA36503.jpeg
 
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I have done a few checks and i can get away with extending the full width of the side of the house and still get the desired slope. But just can't fathom how i would do a double on the back. i dont want to extend on the back of the original roof as that end is the main bedroom so want to extend behind the side double story if that makes sense. I was thinking an "M style roof" but still doesnt give me what i want. Ill try and show it on my software what i mean
 
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I am thinking maybe something like this. Is there a better way to do this?
 

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Just remember most tiles have a minimum angle they work at, so make sure you have that covered
 
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Ah I see. Yeah, looks like a feasible way to do it. Valley into valley.
Does that look like the best option then. I tried looking in my local area but haven't seen anyone do anything similiar. Most have done the side double story but not a rear on to it.
 
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Just remember most tiles have a minimum angle they work at, so make sure you have that covered
Yeh i am currently going through a house sale so will know more in a few months but i am hoping the angle will give me full length of the house. Yours looks quite shall compared to my one.
 
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Mine is a stupidly low roof, which limited the depth of our extension as we had to maintain a 17.5 degree pitch.
 
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Or have a flat roof on the rear corner extension.
I did think that but i think they look ugly on a double story. not so bad on a single story plus i dont think the council will look at it favorably.
 
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I did think that but i think they look ugly on a double story. not so bad on a single story plus i dont think the council will look at it favorably.
Know what you mean but a simple flatty can sometimes look better than an over-complicated pitched roof. Plus of course your pitched option would be a lot more difficult/expensive to detail and build. I see no reason why planners wouldn't like it but if they did you can always have the pitched option as a fall back.
 

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