The price of housing in Islington, measured by square metre, almost doubled between 2004 and 2016 according to new government figures.
On average, a single square metre across all houses and flats sold in 2016 cost £9,730, compared with £4,458 in 2004.
That makes it the sixth most expensive area in Britain, with an increase of 90 per cent over 12 years.
The Islington figure for 2016 is lower than neighbouring Camden (£12,671) and the City (£17,371) but higher than Hackney (£8,564) and Haringey (£7,101).
All but one of the 20 most expensive local authority areas are in London, the Office for National Statistics figures show.
Taking flats and houses together, the average size of properties sold in England and Wales in 2016 was 90 square metres.
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