Microsoft DUB12 is one of four identical single-storey data centres that Microsoft won permission for in June 2016: DUB09, DUB10, DUB12 and DUB13. They form the western block of Microsoft's second Grange Castle campus in Clondalkin, west Dublin. DUB12 sits between DUB10 and DUB13.
Construction began in August 2016. Each building covers about 17,598 m² (189,400 sq ft). DUB09, DUB10 and DUB12 were complete and operating by November 2020. Microsoft won permission in 2021 to add solar PV panels to the DUB12 roof.
Rooftop air handling units cool the data halls with outside air. Evaporative cooling supports them on the hottest days.
ESB Networks serves the campus from the Kilmahud 110 kV customer substation on site. EirGrid operates the transmission system. No behind-the-meter generation serves DUB12.
Twelve standby generators back up the data halls, with a separate admin generator. Microsoft converted the campus generators from diesel to hydrotreated vegetable oil (HVO) in 2023 and 2024.
Microsoft runs twelve data centres at Grange Castle, from DUB03 (2009) to DUB15, plus the stand-alone DUB11.
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One of four identical single-storey Microsoft data centres (DUB09, DUB10, DUB12, DUB13) at Grange Castle in west Dublin, operating by 2020.
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The last of four single-storey Microsoft data centres (DUB09, DUB10, DUB12, DUB13) at Grange Castle in west Dublin, completed in 2021.
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One of four identical single-storey Microsoft data centres (DUB09, DUB10, DUB12, DUB13) at Grange Castle in west Dublin, operating by 2020.
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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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One of two two-storey Microsoft data centres, with DUB14, at the west end of the Grange Castle campus in Dublin, supported by an on-site gas generation compound.
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One of a pair of identical single-storey Microsoft data centres, with DUB07, on the second Grange Castle campus in west Dublin, built in 2017 and 2018.
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Amazon is building a campus with three two-storey data centers (Buildings A, B, and C) with mezzanine floors at each level, having a gross floor area of 78,871 sqm.
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One of a pair of identical single-storey Microsoft data centres, with DUB08, on the second Grange Castle campus in west Dublin, built in 2017 and 2018.
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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.
October 12, 2026 Microsoft Azure
Microsoft has cut the number of buildings planned for the 791-acre Durand Avenue portion of its Mount Pleasant, Wisconsin, data center campus to seven from nine, reducing the parcel's projected taxable value by about 24 percent, or nearly $1.9 billion, the Milwaukee Business Journal reported on...
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September 11, 2026 Microsoft Azure
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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August 04, 2026 Microsoft Azure
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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July 14, 2026 Microsoft Azure
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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July 10, 2026 Microsoft Azure
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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