Sorry I’m not sure of the term ‘principal elevation’ or ‘invisible foreground’. The garage and the neighbouring house is at the bottom of my garden so my house is not in the pic. The garage faces the same road as the neighbouring house so it’s running alongside the extension. So no it’s not in front, it’s at the side. - my mistake!
I probably mistakingly thought that because the aforementioned extension seems to be outside permitted development, i could use that as an excuse for raising my garage roof to 4 metres. Is that not the case?