It won first price in the RIBA Future Homes competition (2004), was listed as one of the Independent's Top Ten Modern Buildings (2004), and won Best Building in the London Architecture Bienalle (2004). And now you can buy it. Clerkenwell House - sometimes known as The Gap - is the result of inspired problem-solving... how could architect Joe Hagan build a house on a plot which he'd bought for just £35,000, but which measured just 11 feet wide? The steel-and-glass seven-storey home for sale today is unique. For £1.15 million you get three double-bedrooms, three bathrooms, a roof terrace with a proper view, and keys to Clerkenwell's skinniest address. Go here for particulars; here for some background.