Green Mountain eyes London data center expansion

Aerial view of the Green Mountain London data center in Romford
(Image credit: Green Mountain)

Green Mountain has announced plans to expand its London data center footprint in a bid to expand capacity for its existing facilities in the capital. 

Work on the new data center will take place in two phases, the company revealed, with each adding 7MW of capacity within the company's existing Romford facility and with more than 5,500 sqm of white space.

There are also plans for a further three halls to accommodate for growing demand from clients.

Long-term, the firm said there is scope to add an additional 16MW of capacity on an adjacent plot of land, with power and planning permission already secured for this site.

"We are delighted to begin expanding the existing operational site to bring additional capacity to market," said Simon Blackburn, Green Mountain's UK managing director.

"The unique location coupled with a strong team experienced in both building and operating highly secure data centers with 100% availability, makes this a fantastic site for customers looking for low latency connectivity, and easy access to London and with an opportunity to expand to 30MW including build to suit options in a single campus."

The announcement follows Green Mountain's acquisition of Infinity earlier this year, including its Romford site, which was renamed LON1-East.

Green Mountain says the site gives the opportunity to build an availability zone with other nearby data centers in Dagenham and Harlow. It has connections to major fiber routes, with over 10 independent fiber providers available offering low-latency connectivity solutions.

Aerial view of the Green Mountain London data center in Romford

Green Mountain plans to expand capacity at its Romford data center (Image credit: Green Mountain)

The site is supported by certified renewable power and will have a target annualized PUE of 1.2, while the backup power generators will use HVO fuel instead of diesel, reducing the CO2 emissions by up to 90%, the firm said.

The first phase of the build is set to be finished by the first quarter of 2025.

"This is a true milestone in our international expansion. London is an extremely important data center hub and a must-have location for many international companies," said Svein Atle Hagaseth, CEO of Green Mountain.

"Our aim is to gradually expand our footprint in several international markets. London is an ideal location to continue executing this strategy."

London data center demand is booming

This move from Green Mountain marks the latest in a number of data center expansion announcements in Greater London.


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In early 2023, Vantage Data Centers announced its entry into the London market with a £500 million investment in a 48MW data center. This was followed by a £250 million investment to create a second center in Park Royal.

Last week, Kao Data announced the opening of its second data center in Harlow, KLON-2, saying there's scope for several more.

2022 also witnessed a surge in data center funding across the UK, with investments from major companies such as Kao Data, Ark Data Centres, Echelon Data Centres, Colt Data Center Services, CyrusOne, Datum Datacentres, Global Switch, VIRTUS Data Centres, and Vantage Data Centers.

Emma Woollacott

Emma Woollacott is a freelance journalist writing for publications including the BBC, Private Eye, Forbes, Raconteur and specialist technology titles.