Originally Posted by David Hill

Firstly I'd make the front a lot taller, Min of 1.25m I'd make the back
2m, and slope the roof in one piece not 2 sections,
I can't see where you intend to have a door,
What are the ground measurements, I have no idea what 3477 0677 is.
What is the back wall? part of the house or what.
David @ a damp and windy part of Swansea Bay