• Hemel Hempstead 4 Data Center

Our Hemel Hempstead 4 Data Center is located in Hemel Hempstead, a town located 24 miles northwest of London, in Hertfordshire, and is part of the Greater London Urban Area. It has attracted many businesses due to its proximity to London and excellent connectivity links, with easy access to the UK motorway network and London airports. 7,300 businesses are located in Hemel Hempstead and the surrounding areas, major international firms with a presence include Amazon, BP, BT, Kodak, Epson, Sopra Steria, Unisys and ASOS.com. The high availability of development land in Hemel Hempstead make it an ideal business location, the major business park, Maylands Business Park, is the largest business park in the South East with 700 businesses residing there.

Once fully built, our Hemel Hempstead 4 Data Center will have 9,900 sqm of available data center space and will be supported by 24 MW of IT load. The grand opening of the first building stage is scheduled for Q4 2021.

At a glance: Hemel Hempstead 4 Data Center

Power supply:

  • On-site substation delivering 60 MVA of power
  • Dual dedicated 11,000V (HV) grid connections (2n)
  • Dedicated n+1 redundant HV substations on-site
  • Minimum n+1 (UPS) with battery back-up


  • 24/7 on-site security
  • 3.6 m SEAP certified security fence with electrified topper
  • Proximity cards to authorize access levels including man trap access
  • Biometric identification
  • PAS68 certified anti ram-raid barriers throughout site perimeter

Technical operations:

  • Monitoring of all critical infrastructures by NTT's internal operating personnel
  • Standardized operating procedures with extended technical system redundancy to ensure maximum reliability


  • Carrier neutral
  • Carrier mix from global tier 1 supplier to regional supplier
  • Redundant Carrier-Meet-Me-Rooms
  • Pre-cabling to support fast cross connect deployments
  • Inter data center connectivity between NTT data centers for geo-redundant solutions
  • Multi cloud interconnection platform to connect our clients to major cloud service providers such as Amazon Web Services, Microsoft Azure, and Google Cloud Platform