NTT has announced the opening of its 7th London data center site in Hemel Hempstead in the London area, delivering half its full capacity in phase 1, and adding 9,600m² of IT space and 24MW IT load when fully built out.
NTT is also planning investments to expand its data center capacity in Dagenham, East London that was opened in 2020. NTT’s London data centers currently deliver 53+MW operational IT capacity. These investment plans would give NTT the option of more than doubling its capacity to 120+MW in the London market, when Hemel Hempstead 4 and London 1 are fully built out.
As with all NTT data centers in the UK, Hemel Hempstead 4 uses 100% renewable energy and has been engineered for low water usage (WUE). Additionally, NTT’s London 1 Data Center has high sustainability credentials and is the only large UK data center to be BREEAM2 excellent certified, which is a significant attainment, evaluating the procurement, design, construction and operation of a project based against performance benchmarks and is recognized worldwide.
LINX, London Stock Exchange

London 1 Data Center is located just 10 miles east of London’s city center, close to Docklands, the UK’s Internet hub and backbone for the global Internet network which facilitates the London Internet Exchange (LINX). London’s Docklands have been an internet hub for the city with large investments, over the last decade plus, in now aging data centers. NTT’s investment into East London would support the city’s financial services, media and tech industries as they continue their digital transformation.
NTT also connects its Dagenham, Hemel Hempstead, and Slough data centers, with an option to connect to the London Stock Exchange. This creates a fiber-connected London hub that is fully integrated with other NTT global data center facilities.
NTT clients would benefit from full diverse multi-duct entry and high fiber count from multiple metro and international providers, as well as direct fiber and capacity connectivity to all major carrier hubs. This includes Docklands and Slough, as well as major cloud, Internet, and financial eco systems.
Connectivity from NTT’s London hub into NTT’s Global Data Center Interconnect (GDCI) – an integrated global network fabric service – would deliver a cross regional data center network and private secure connection to major cloud service providers.
“As the third-largest data center provider in the world, NTT continues to significantly accelerate our investment into the London and UK market as a key global location,” said Masaaki Moribayashi, President and Board Director at NTT. “This investment provides scalable data center and connectivity infrastructure for our clients’ digital transformation needs.”
Global Data Centers is a division of NTT. Their global platform is one of the largest in the world. It spans more than 20 countries and regions including North America, Europe, Africa, India, and APAC.