Ranked: The 50 most expensive neighbourhoods in New York City

Hong Kong is once again the most expensive place in the world for expatriate rental accommodation, with average monthly costs of US$10,929, followed by New York, Tokyo and London.

Four out of five of the world’s most expensive cities for expatriates are now in Asia, according to the 24th annual Cost of Living Survey by Mercer.

Hong Kong has been usurped as the world's most expensive city by Ashgabat in Turkmenistan, according to the latest Mercer Cost of Living Survey.