Microsoft DUB04 is a single-storey data centre joined to the west end of DUB03 on Microsoft's original Grange Castle campus in Clondalkin, west Dublin. DUB05 sits just to the south.
Microsoft announced the $130 million extension in February 2012 and brought it online around the end of 2012. The building covers 112,000 sq ft.
DUB04 brought Microsoft's Gen 4 modular design to Dublin. The single-storey steel-frame structure uses pre-manufactured, recycled metal cladding on a concrete pad foundation. A concrete roof carries the air handling units. Microsoft says the modular approach cut materials, carbon footprint and waste by about half compared with a traditional build. Microsoft fits out the data halls in modular increments as demand grows.
Rooftop air handling units cool the data halls with outside air. The 2012 design dropped the DX units, adiabatic cooling and return-air fans used in DUB03. An evaporative mode now supports the air handlers on rare hot days. Microsoft runs the halls at about 75°F, with short excursions to 85°F in hot spells.
ESB Networks serves the campus from the Kilmahud 110 kV customer substation next to DUB03, switched in during January 2010. EirGrid operates the transmission system. No behind-the-meter generation serves DUB04.
Eleven containerised diesel generators with integrated belly tanks back up DUB04, in a generator yard north of the building.
Microsoft has since built DUB06 through DUB15 on a second campus to the east and south within Grange Castle Business Park.
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| NN milesInterested in this information?Contact us | ThreeInterested in this information?Contact us |
Microsoft's third data centre on its original Grange Castle campus in west Dublin, a 169,000 sq ft single-storey building completed in spring 2014.
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| NN milesInterested in this information?Contact us | Central ValleyInterested in this information?Contact us |
Microsoft's first data centre outside the US, a 303,000 sq ft two-storey building at Grange Castle in west Dublin, opened July 2009.
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| NN milesInterested in this information?Contact us | EdgeConnex DUB04 |
Ireland's national planning board, An Coimisiun Pleanala, has given the green light for two data centers in Dublin, overturning a 2023 decision by the local council to refuse permission.
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| NN milesInterested in this information?Contact us | Edgeconnex Dublin |
EdgeConnex initially built a 4,500sqm data centre (DUB01) in 2016 and later extended that facility further before adding a new 1,500sqm data hall in 2017.
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| NN milesInterested in this information?Contact us | Edgeconnex: DUB02 |
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| NN milesInterested in this information?Contact us | Metro CampusInterested in this information?Contact us |
One of two two-storey Microsoft data centres, with DUB15, at the west end of the Grange Castle campus in Dublin. Its first of five data halls went live in July 2023.
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| NN milesInterested in this information?Contact us | Edgeconnex: DUB03 |
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| NN milesInterested in this information?Contact us | EdgeConnex DUB05 |
Ireland's national planning board, An Coimisiun Pleanala, has given the green light for two data centers in Dublin, overturning a 2023 decision by the local council to refuse permission.
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Campus exterior and data hall photography for this operator.
Campus exterior and data hall photography for this operator.
Campus exterior and data hall photography for this operator.
Microsoft uses Containers (called ITPACs) to build out its data centers. These Containers are Shipping Containers fitted with all the necessary climate control, networking, server racks and other hardware necessary to be a “mini” data center all in one.
An Azure region is a set of data centers deployed within a latency-defined perimeter and connected through a dedicated regional low-latency network.
With more global regions than any other cloud provider, Azure gives customers the flexibility to deploy applications where they need to. Azure is generally available in 46 regions around the world, with plans announced for 8 additional regions.
An Azure geography is a discrete market, typically containing two or more regions, that preserves data residency and compliance boundaries.
Geographies allow customers with specific data-residency and compliance needs to keep their data and applications close. Geographies are fault-tolerant to withstand complete region failure through their connection to our dedicated high-capacity networking infrastructure.
Availability Zones are physically separate locations within an Azure region. Each Availability Zone is made up of one or more data centers equipped with independent power, cooling, and networking.
Availability Zones allow customers to run mission-critical applications with high availability and low-latency replication.
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Microsoft plans to more than triple its data center capacity over the next five years, targeting 38GW by 2032, up from its current 12GW. The capacity will combine Microsoft-owned facilities with leased capacity from third-party providers, including neoclouds such as CoreWeave, Nscale, Lambda,...
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Swiss startup Exclaim Robotics, founded by a former Microsoft engineer, has raised $4.95 million in pre-seed funding to develop autonomous robots for AI data center maintenance. Backed by Founderful and Playfair, the company aims to automate remote hands tasks such as cleaning optics,...
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Pure DC has launched the first phase of its Seinäjoki, Finland, data center project, with Microsoft reportedly among the customers leasing capacity at the site. The initial phase will deliver 110MW of capacity with an estimated investment of $1.7 billion. Pure DC has been developing plans for the...
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Microsoft reported a 25 percent year-on-year rise in carbon emissions, with total Scope 1, 2, and 3 emissions increasing to 20.29 million metric tons of CO₂e as data center expansion accelerated. The company said the jump was largely due to its decision to stop using unbundled renewable energy...
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July 04, 2026 Microsoft Azure
National Grid Ventures (NGV), the commercial arm of National Grid, has acquired a 35% stake in Joulent for $1.75 billion to support development of power infrastructure for large data centers. The investment will help fund Project Kilby, a 2.67GW natural gas facility being developed with Chevron....
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