NTT Hempstead4

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Operational
Fully operational facility
Operated by:

NTT Hempstead4

Short Code: HH4
Year Built: 2021

Sites leasing space from NTT:

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NTT Global Data Centers opened its 7th London data center site in Hemel Hempstead – known as Hemel Hempstead 4 – in December 2021.

Technical Details:


• 4,800+m² of IT space
• Dual dedicated 11,000V (HV) grid connections (2N)
• Dedicated N+1 redundant HV substations on-site
• Minimum N+1 (UPS) with battery backup

Certifications:


• ISO 9001
• ISO/IEC 27001
• ISO 22301
• ISO 50001
• ISO 45001
• ISO 14001
• PCI DSS
• ISAE 3402 Type 2 Report
• ISAE 3000 Type 2 Report

Map and Nearby Locations:

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NTT Sites
Nearby Facilities

Sites within 15 miles of NTT Hempstead4

Distance Site About
0.03 miles Hyperscale Data Center Request Dataset
0.25 miles Hyperscale Data Center Request Dataset
0.36 miles NTT Hempstead 3
0.43 miles Northtree: Hemel Hempstead
Northtree Investment Management has received outline planning approval to redevelop 45 Maylands Avenue in Hemel Hempstead into a state-of-the-art data center.
0.43 miles NTT Hempstead 1
0.68 miles NTT Hempstead 2
3.21 miles Abbots Langley Data Centre
7.86 miles Ark: Elstree Campus
Ark Data Centres is developing a massive data center campus in the Elstree/Hertsmere area, close to the A41 and M25.
7.87 miles CapitaLand: Chess Building
In 2023, CapitaLand acquired the building from Digital Realty for $159 million.
7.89 miles Ark: Elstree Expansion
7.95 miles Lunar 5
Lunar 5 is described as a “premium data-center facility” with 7,400 m² of net customer space across eight data halls.
8.09 miles Computacenter: Hertfordshire
8.39 miles Thrive Luton
The site was formerly operated by ONI before being acquired in August 2021.
8.64 miles Echelon LCY20
Ireland’s Echelon Data Centres has partnered with Starwood to develop a second UK data center.
9.66 miles Intercity: Elstree
The Intercity Technology Elstree data center is located on Theobald Street in Borehamwood (Greater London/Hertfordshire border).
10.23 miles ServerChoice: London
10.24 miles Equinix: Hertfordshire Expansion
10.32 miles Equinix: Hertfordshire Campus (DC01UK)
Equinix has purchased the DC01UK data center campus in Hertfordshire, UK, a site now referred to as the Hertfordshire Campus.
10.96 miles Colt London North: Welwyn Garden City
London, Welwyn Garden City is a carrier neutral facility situated just 35 minutes train journey north of London’s Kings Cross station.
10.96 miles INAP North London
INAP's North London data center is located within Colt's facility on Black Fan Road
11.02 miles CapitaLand: Welwyn Garden City
In July 2024, CapitaLand secured planning permission for a £87 million data centre redevelopment.
11.49 miles Hyperscale Data Center Request Dataset
Amazon is planning a two-building campus at Linmere Island, near Houghton Regis, northwest of Luton.
13.25 miles ServerChoice: Stevenage
Opened in 2008 to great acclaim, Stevenage Data Centre was ServerChoice’s first facility and has been operating continuously with 100% uptime.
13.59 miles Fujitsu: London North STE04
Located in Stevenage, the Fujitsu London North (STE04) facility is a landmark high-resiliency data center that serves as a core hub for Fujitsu’s UK digital infrastructure.
13.61 miles Nigsun: Stevenage NCS1
The Nigsun Datacentre NCS1 is a Tier 3-standard, carrier-neutral facility located in the A1 corridor of Stevenage, designed to host mission-critical IT infrastructure for cloud providers and enterprises.
14.81 miles CyrusOne: London LON6
CyrusOne is set to expand its presence in the greater London area with a new, sixth data center campus in Iver Heath, Buckinghamshire.
14.83 miles CyrusOne: LON6 Bldg2
This facility will be part of CyrusOne's LON6 Campus in London.
14.85 miles CyrusOne: LON6 Bldg3
This facility will be part of CyrusOne's LON6 Campus in London.
14.87 miles CyrusOne: LON6 Bldg4
This facility will be part of CyrusOne's LON6 Campus in London.
14.89 miles CyrusOne: LON6 Bldg5
This facility will be part of CyrusOne's LON6 Campus in London.
14.90 miles CyrusOne: LON6 Bldg6
This facility will be part of CyrusOne's LON6 Campus in London.
14.97 miles Barclays Data Centre
14.97 miles Kao Data: Northolt
Kao Data's Northolt site is in West London, inside the M25. It's easy to reach from central London and Heathrow Airport.
15.33 miles Pinewood: Slough Campus
Pinewood Group, owned by Aermont Capital, has revised its 2023 plans for a 1.4 million sqft film studio expansion west of London.
15.39 miles Pure DC: Brent Cross
Pure Data Centres' Brent Cross project has entered its second phase, with the installation of superstructure steelwork now underway for a new building.
15.54 miles Sequence: Iver, Buckinghamshire
The project aims to redevelop a 16.5-hectare former landfill site located east of the M25 along Slough Road (A4007), just south of the existing Iver Substation.
15.67 miles iomart: DC12 North London
iomart acquired the LDeX Group in December 2018, and what was previously known as the LDeX1 site is now integrated into iomart's network as DC12 North London.
15.71 miles West London Tech Park
Applications to develop on Green Belt land have been rejected twice by Buckinghamshire Council, but the new government has indicated that the latest proposal will be reviewed and may be approved.
15.75 miles West London Tech Bldg2
This facility is part of Greystoke's West London Tech Park.
16.26 miles QuickHostUK: High Wycombe
Located in High Wycombe, Buckinghamshire, QHUK DC1 is a purpose-built, privately owned data center operated by QuickHost (formerly QuickHostUK).
16.69 miles Segro Pure Premier Park
Segro, a leading property investor, has joined forces with Pure DC to develop a 30,000 square meter (322,915 square foot) data center in West London.
16.78 miles Coreix Enfield
16.90 miles Hyperscale Data Center Request Dataset
As part of a £5 billion two-year commitment to the UK, Google has opened a new data centre in Waltham Cross, Hertfordshire.
16.94 miles Thorney: Iver DC-A
Thorney Lane LLP has proposed the development of a data center campus at Thorney Business Park in North Iver, Buckinghamshire.
16.97 miles Colt: London 8
This planned facility is part of Colt's London Hayes Campus in West London.
17.06 miles Options West London
17.06 miles Colt: London 7
This planned facility is part of Colt's London Hayes Campus in West London.
17.10 miles VIRTUS: London 7
The facility is part of the VIRTUS Stockley Park Campus. LONDON7 comprises over 13,000m² of net technical data center space.
17.12 miles VIRTUS: London 6
The facility is part of the VIRTUS Stockley Park Campus. LONDON6 comprises over 7,000m² of net technical data center space.
17.12 miles Colt: London 6
This planned facility is part of Colt's London Hayes Campus in West London.
17.14 miles CorScale: Court Lane, Iver
In December 2024, Corscale Data Centers received approval to develop a new campus in London.
17.18 miles VIRTUS: London 8
The facility is part of the VIRTUS Stockley Park Campus. LONDON8 comprises over 7,000m² of net technical data center space.
17.18 miles VIRTUS Stockley Park Campus
The VIRTUS Data Centre Campus at Stockley Park is located close to the well known Stockley Park business center. The campus comprises of four facilities and is built with VIRTUS' value of flexibility at the core of the design.
17.19 miles Equinix London LD3
17.19 miles Vantage London II
Located in Park Royal in West London, LHR2 is a six-story data center spanning 194,000 square feet (18,000 sqm).
17.21 miles Colt: London 5
This facility is a part of Colt's London Hayes Campus in West London.
17.22 miles Hyperscale Data Center Request Dataset
Amazon Data Services has officially filed a proposal with Buckinghamshire Council to redevelop the Ridgeway Distribution Centre in Iver into a 30,525 sqm data center campus, a move that signals a significant shift from the site's industrial past.
17.23 miles Colt: London Hayes LON4
Colt DCS is set to double the size of its planned data center campus in Hayes, West London, after acquiring a fresh parcel of land.
17.30 miles Ark: Alliance Park
Ark Data Centres acquired the Renault Retail Group’s West London site expecting to start construction of the data centre in 2022. The site will go live in 2025.
17.30 miles Colt Powergate
The Powergate data center is outside of the heart of the city but within zone 2, making the site easily accessible. This Colt tier III facility provides over 3,700m2 of data centre space and 15 MVA of power.
17.38 miles Equinix London LD9 Powergate
LD9 is located in West London's Park Royal campus. The data centre was a Telecity managed facility before Equinix acquired Telecity in July 2016.
17.41 miles Thorney: Iver DC-C
This facility is part of Thorney Lane LLP's data center campus at Thorney Business Park in North Iver, Buckinghamshire.
17.48 miles Thorney: Iver DC-B
This facility is part of Thorney Lane LLP's data center campus at Thorney Business Park in North Iver, Buckinghamshire.
17.50 miles VIRTUS: London 14
The Virtus London 14 data center spans two floors, offering 8,600 square meters of white space distributed across six data halls.
17.51 miles Thorney: Iver DC-F
This facility is part of Thorney Lane LLP's data center campus at Thorney Business Park in North Iver, Buckinghamshire.
17.52 miles Hyperscale Data Center Request Dataset
Microsoft has started building a new £1 billion data center in Park Royal, west London, with construction scheduled to finish by early 2026.
17.55 miles Thorney Lane LLP: Iver Campus
The redevelopment of Thorney Business Park in Iver has evolved into a massive, two-phase masterplan that significantly expands upon the original vision.
17.56 miles Segro: Iver Campus
The redevelopment of Thorney Business Park in Iver has evolved into a massive, two-phase masterplan that significantly expands upon the original vision.
17.57 miles Marvel: Hayes
The 1,914 sqm (20,602 sq ft) development will feature data halls, offices, and a single backup generator.
17.57 miles Thorney: Iver DC-E
This facility is part of Thorney Lane LLP's data center campus at Thorney Business Park in North Iver, Buckinghamshire.
17.57 miles Hyperscale Data Center Request Dataset
Located in the Silverdale Industrial Estate, this new West London facility is a specialized two-story data center dedicated to AWS tape storage.
17.61 miles Vantage London I Campus
Vantage's LHR-1 data center spans 430,000 sq ft (40,000 sqm) across two multi-story data centers.
17.62 miles CyrusOne London II (Stockley Park)
The London II datacenter was originally built by Infinity SDC.
17.63 miles Thorney: Iver DC-D
This facility is part of Thorney Lane LLP's data center campus at Thorney Business Park in North Iver, Buckinghamshire.
17.67 miles VIRTUS London1 Enfield
17.67 miles Wavenet: Enfield
Wavenet’s Enfield facility is not a stand-alone data centre – it is “Data Hall 4” inside the Virtus LONDON1 campus.
17.70 miles DRT London (Cresses Business Park)
CapitaLand Ascendas REIT acquired this data center from Digital Realty in 2021.
17.70 miles CapitaLand: Cressex Business Park
Cressex Business Park is a colocation data centre comprising a single-storey unit and a two-storey office.
17.70 miles Redwire: London
In 2010, Kingmead Homes were appointed Project Managers for Redwire DC’s 45,000 sq ft state-of-the-art data centre in Ealing Broadway, delivered alongside a 165-bed Premier Inn hotel on a 25-year lease.
17.72 miles Rackspace: LON8
17.75 miles Link Park Heathrow Data Center
The proposed three-story facility, situated on 10.75 acres, would have provided 16,850 sqm (181,400 sq ft) of IT space.
17.76 miles Ark: Union Park
There are 21 Data Halls of approximately 1250m2 each, to be deployed at approximately 3MW per hall.
18.00 miles Virtus: London 18
This facility is part of the new campus in Saunderton, Buckinghamshire, operated by the UK data center company Virtus.
18.01 miles Virtus: Saunderton Campus
UK data center company Virtus plans for a new campus in Saunderton, Buckinghamshire. At full build-out, the campus will feature four data center buildings.
18.02 miles Yondr: Slough 3
Known as Building C, the 25,100 sqm (270,175 sq ft) building comprises four data halls over two stories.
18.06 miles Yondr: Slough 2
This facility is part of Yondr's London Slough Campus.
18.08 miles Virtus: London 17
This facility is part of the new campus in Saunderton, Buckinghamshire, operated by the UK data center company Virtus.
18.09 miles Virtus: London 16
This facility is part of the new campus in Saunderton, Buckinghamshire, operated by the UK data center company Virtus.
18.09 miles CyrusOne London III
Built-in 2021, CyrusOne London III is a purpose-built data center offering over 39,000 sqft of technical space.
18.11 miles Lumen Slough
18.12 miles Yondr: Slough Campus
Yondr completed the first phase of its London Slough Campus in 2024. The campus will consist of three buildings upon full build-out.
18.16 miles CyrusOne London I
Located in Slough, one of the UK’s premier data center locations, CyrusOne London I delivers 9MW of IT power to 4,300 sq m of technical space.
18.16 miles VIRTUS Hayes London2
18.17 miles Iron Mountain London LON-1
Strategically located in the Slough Trading Estate, LON-1 is a 183,000 SF colocation facility on Iron Mountain's 5.5-acre London data center campus. Enjoy close proximity to one of Europe's largest network ecosystems. The site was acquired in a sale-leaseback transaction with Credit Suisse
18.18 miles VIRTUS Slough London 3 and 4
The datacenter first opened in 2014 by Infinity SDC, but in 2015 VIRTUS acquired the site which is now called London 3. London3 is the closest (non-Equinix) facilities to Equinix's LD4 making it an option to be part of the financial trading ecosystem, but colocated outside of Equinix.
18.19 miles Equinix: Wexham Road
Equinix plans to turn a former paint factory in Slough, UK, into a data center.
18.23 miles Equinix LD12
18.24 miles Equinix LD14
18.25 miles Equinix LD7
18.26 miles Equinix LD13x
18.27 miles Equinix LD10
18.27 miles VIRTUS LONDON10
18.27 miles Rackspace London Slough (LON3)
Raised Flooring: 5,000 sq m 15 MVA Total Utility Power Manned 24x7x365
18.29 miles GoDaddy Slough (HEG)
18.30 miles Equinix Slough Campus LD4, LD5, LD6, LD10
Critical to London’s Financial industry, Equinix’s collection of non-contigous data cetners in Slough function as a virtual campus via innerduct paths that connect them. The campus is one of the largest data centres in London.
18.30 miles Exa: Hoddesdon
18.30 miles Logicalis Slough
18.31 miles Iron Mountain: LON3
Iron Mountain is planning to construct its LON-3 data center, which will feature 5,220 square meters of data center space
18.31 miles Iron Mountain London LON-2
18.34 miles Equinix LD6
18.35 miles Equinix LD5
Equinix's LD5 datacenter is part of Equinx's Slough Campus, an important Financial trading hub. More details can be found on the Slough Campus page.
18.37 miles VIRTUS LONDON9
18.38 miles Virgin Media O2 Slough
Located in the world-renowned Slough Trading Estate, the Virgin Media O2 Slough Data Centre serves as the vital "heartbeat" of the company’s UK mobile operations.
18.43 miles NTT Slough 3
The site was previously known as "Gyron Ajax 2 - Slough" before being acquired by NTT.
18.43 miles Equinix LD4
Equinix's LD4 datacenter is part of Equinx's Slough Campus, an important Financial trading hub.
18.45 miles GTR: Slough
The new Slough campus comprises of three independent data centres capable of operating individually, or as one interlinked campus.
18.45 miles GTR: Slough 2
The new Slough campus comprises of three independent data centres capable of operating individually, or as one interlinked campus.
18.45 miles GTR: Slough 3
The new Slough campus comprises of three independent data centres capable of operating individually, or as one interlinked campus.
18.45 miles NTT Slough 2
18.48 miles Equinix LD11x
18.49 miles VIRTUS London 11
18.50 miles China Mobile Slough
18.51 miles Digital Realty: LHR26
In 2024, Digital Realty expanded its London presence by acquiring a data center in Slough, UK, previously owned by Cyxtera.
18.51 miles Digital Realty: LHR27
Located just 15 minutes from London Heathrow in the Slough Trading Estate, our LHR27 Data Center offers prime connectivity and scalability.
18.54 miles Kao Data Slough
Kao Data's KLON-06 facility in Slough Trading Estate offers 16MW Tier 3 colocation, located in UK's data center heartland in the connectivity-rich West London Availability Zone.
18.56 miles Gravity Edge: London LDN2
18.62 miles Segro: London Slough Campus
Segro has secured planning approval to develop a data center campus on Bath Road, Slough.
18.62 miles Segro: Slough 2
This planned facility will be part of Segro's London Slough Campus.
18.69 miles CyrusOne LON5
18.83 miles Creslow Park
Creslow Park is a data center located in a rural area of Buckinghamshire, United Kingdom.
19.08 miles DRT London (West Drayton)
19.18 miles Wycombe Air Park
The 13-hectare site will feature six data centre buildings, a substation, and a gatehouse, encompassing approximately 580,000 square feet.
19.23 miles Ark: Meridian Park
19.41 miles Vision247: London
Located in the heart of West London’s media hub, the Vision247 Chiswick Data Centre is a specialized boutique facility tailored for the broadcasting and digital media industries.
19.70 miles Visa United Kingdom
19.81 miles Tritax: London Slough (Phase 2)
Future expansion is being considered for the Tritax Big Box London Slough Campus, with a possible second phase.
19.89 miles Tritax: London Slough (Phase 1)
Tritax Big Box, a UK real estate investment trust, has acquired a 74-acre site near Heathrow, London, for data center development.
19.97 miles Verizon London UK5

NTT Hempstead4 Data Center Photos (See all)

Rendering of HH4
Source: Baxtel

Operating Company

Operated by:

Global Data Centers is a division of NTT DATA. The company is one of the largest in the data center providers in the world, spanning more than 20 countries and regions, including the Americas, Asia Pacific, EMEA and India. NTT is routinely recognized as a Leader by leading networking and data center analysts.

As a neutral operator, NTT offers access to multiple cloud providers, a large variety of internet exchanges and telecommunication network providers including our own IPv6-compliant Tier 1 Global IP Network.

137
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17
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1688MW
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