The firm's chief executive, Sundar Pichai announced plans to build a 10-storey, 650,000 square foot complex alongside its new offices in Pancras Square.
The company, the largest unit of Alphabet Inc., said it would be able to house as many as 7,000 workers at the London campus after the expansion - 3,000 more than a spokesman said it now employs in the U.K. Google Chief Executive Officer Sundar Pichai described the plan as a sign of the company's commitment to the country. The commitment is the latest by a major technology company since the referendum, coming after Apple and Amazon announced plans to expand in the capital.
"We are committed to the United Kingdom and excited to continue our investment in our new King's Cross campus".
The outcome of the United Kingdom referendum known as Brexit which saw the country opting for leaving the European Union earlier this summer surely created a bit of turbulence in the economic space, leaving more than a few companies in a state of uncertainty.
Google now employs around 4,000 people in the United Kingdom; that figure will rise to 7,000 by 2020 under the current plans.
It's unclear what border rules will be imposed once Britain leaves the EU. Many see the move as a vote of confidence in England following the Brexit vote.
Google's CEO, who is visiting the country and has today met with the city's mayor Sadiq Khan, showed the Mountain View firm's plan that sees London as a crucial location for its future development: up to 3000 new jobs will be created within the next four years, in an overall investment that is said to go past £1 billion.
Google's announcement was welcomed by Britain's finance minister, Philip Hammond, who said it signalled a "big vote of confidence" in the United Kingdom as a global tech hub.
Chancellor Philip Hammond said: "It's further proof that Britain is open for business and that we continue to be an outward looking, world-leading nation".