Well I guess if it's a southerly neighbour sharing a side return then a shadow about a floor higher than currently cast. And the first floor window will now be 'under' the roof of the outrigger rather than above it. LondonMix Wrote: ------------------------------------------------------- > Yes, it?s permitted development. Given that the > extension over the outrigger cannot be higher than > the existing roof ridge, what kind of shadow do > you think it can cast? Also, how could this > impact the view out of a bedroom on the first > floor of a neighbor exactly?