London's biggest and most expensive office building, HSBC Holdings' global headquarters, is up for sale and could fetch more than £1 billion ($1.68 billion).
The 44-story, 1.1 million square-foot building based in the city's Canary Wharf district is being marketed by estate agents JLL and GM Real Estate.
The two agencies confirmed the sale to CNBC, which was first reported by the Financial Times. Tony McCurley, a partner at GM Real Estate, told CNBC that the grade A building was very high profile.
"We are expecting strong international interest, particularly as the outlook for the real estate market in London is very positive," he said via email.