[PaulDavisThe1st]

OK, I see what you mean now. It's a very subtle L :)

I am extremely familiar with this shape - my sister lives in one just like this in Walthamstow (prolly not worth 2M yet though).

[michaelt]

It's subtle - but it's an extra 7m of exposed wall on a house that would otherwise only have 10m of exposed wall (the plots being about 5m wide)