These changes will make the London office Facebook's largest engineering hub outside of the U.S.
Nicola Mendelsohn, vice-president of Facebook's European operations, said the new office opening should be taken as proof of the company's commitment to investing in the United Kingdom, where it has had offices for nearly a decade.
Facebook said the new office will also be the site for some work on its Oculus virtual reality platform, including some of the social aspects of the technology.
Facebook opened its first office in London 10 years ago and has said it expects its British workforce to reach 2,300 by the end of next year.
She added that Britain's "entrepreneurial ecosystem and engineering excellence" had made it the ideal location for any technology firm.
Shashi Kapoor, Bollywood legend, dies at 79
Neither of the three continued their careers in films owing to their accented Hindi and non-Indian looks lent by late mother. The Government of India honoured him with a Padma Bhushan for his contributions to art and cinema in 2011.
The new office, in Rathbone Place, central London, will be home to a mix of Facebook engineers, developers, sales and marketing staff, and will also provide temporary accommodation for UK-based startups through the firm's LDN-LAB initiative.
The 247,000-square-foot (75,285-square-meter) office, designed by architect Frank Gehry, opened Monday.
The new LDN_LAB will constantly host several start-ups, with Facebook offering advice and guidance on how to launch and grow their business.
Facebook has plans to invite UK-based start-ups to participate in a three month program created to help them set up their own business.
Facebook experts from a range of disciplines including engineering, product and partnerships, will share their knowledge, expertise and mentorship as part of the programme. This country has been a huge part...