I love everything about the exterior on this, the colours, the spacing between the top of the upstairs window and the roof, the 'hat' type roof, the nice large front door, the plants etc. :D Great look for an English house :D
Single story rear extension? this is a great example of how you can use your space. Seperate your kitchen area, but still keep it "open plan" for informal feeling with space for zoning of dining area. large velux windows and floor to ceiling concertina doors brings the outdoors in for those breezy summer days :) Simple. Love.