Portland Road is a road in Notting Hill, in the Royal Borough of Kensington and Chelsea that was built as a speculative development in the 1850s. The road has been noted for its division into three sections of different wealth: the section between Holland Park Avenue and Clarendon Cross/Hippodrome Place being one of the most expensive places to buy a house in London, a section of terraced houses further north being also very expensive but less so than the lower reaches of the road, and a section at the northern end that was once slums and is now working class social housing and is described as being north of an "invisible line" that divides it from the privately owned sections of the road.