For a single person or a couple the step up in monthly rental from a studio to a 1 bedroom flat costs an additional £300. The median rental price in London for a 1 bedroom home is £1,155, more than double the median price for England of £525.
Data from the Valuation Office Agency, the body that advises the government on property values, shows the highest prices in the capital are in Kensington and Chelsea and Westminster, with the City close behind.
Camden and Islington have prices in excess of £1,400 and there is a ring of inner London boroughs, from Hackney in the north east to Hammersmith in the west and Lambeth in the south where monthly rents are still above £1,200.
Further out, prices are broadly the same in Barnet, Hounslow or Merton. Cheaper prices can be found in the south, in Sutton, Croydon and Bromley. But only Havering, Barking and Dagenham and Bexley offer a median rent below £800 a month for 1-bedroom properties.