Blink and you could easily miss it. Wedged between a doctor's surgery and a hairdressing salon, London's thinnest house is only identified by a streak of dark blue paint. But the five-floor house in Shepherd's Bush -- which is just 5ft 6ins (1.6 metres) at its narrowest point -- is currently on the market for £950,000 ($1.3 million, 1.1 million euros).