Facebook`s European head Nicola Mendelsohn, who is to announce the plan at the CBI conference on Monday, said many of the jobs will be high-skilled engineering positions.
She said: "The UK remains one of the best places to be a tech company and is an important part of Facebook`s story.
"We came to London in 2007 with just a handful of people; by the end of next year we will have opened a new HQ and plan to employ 1,500 people."
The new office is currently under construction in Fitzrovia, central London, a Facebook spokeswoman added.
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