The average home in Croydon costs £408,013 and comes with 257.9 square metres of private outdoor space. With the largest average garden in London at 331.1 square metres and an average house price of £534,443, Bromley is also one of the most spacious. In fourth place was Sutton (£1,768 per square metre), followed by Havering (£1,804 per square metre). Kensington and Chelsea was revealed as the most expensive borough for garden space in London—and the entire UK. All 33 London boroughs rank within the UK’s top 50 highest cost of private outdoor space.