An Coimisiún Pleanála has granted planning permission for the expansion of Google’s data center campus at Grange Castle Business Park in south Dublin, overturning a previous rejection by the local authority. The approval allows for a 72,400sq m facility, though the project remains subject to specific environmental and grid-related conditions.
Reversing the Local Council’s August 2024 Veto
The project, which represents the third phase of Google’s Grange Castle campus, was initially refused by South Dublin County Council in August 2024. At that time, local planners cited insufficient capacity in the regional electricity grid and a lack of significant on-site renewable energy as primary reasons for the denial.
Google subsequently appealed the decision to An Bord Pleanála—which transitioned into An Coimisiún Pleanála in 2025. The tech giant argued that the council was not the appropriate body to determine grid capacity, noting that it had secured a grid connection agreement for the expansion from EirGrid in 2021. The national planning body ultimately upheld the appeal, clearing the way for the development to proceed.
Strict Environmental Mandates and Renewable Fuel Rules
Permission for the expansion comes with strict requirements. Google must demonstrate ongoing engagement with power purchase agreements and ensure that all backup generators operate on renewable fuel.
The company is also mandated to implement mitigation measures outlined in its environmental impact assessment. These include efforts to enhance the site’s ecological value and incentives to encourage staff to use public transport, walk, or cycle to the facility.
Potential Legal Hurdles and Judicial Review Risks
While the approval facilitates the construction of the data center, it does not guarantee an immediate start to the project. The decision remains eligible for judicial review in the coming weeks, a process that could potentially delay site works.
Escalating Energy Demands Across Ireland’s Grid
Data centers have become a focal point of debate in Ireland due to their significant energy footprint. According to data, these facilities accounted for nearly 25% of Ireland’s total electricity consumption last year, a sharp increase from 5% in 2015.
Public Opposition Meets Corporate Investment Plans
Public sentiment regarding the expansion of such infrastructure remains divided. An Irish Times/Ipsos B&A opinion poll published last week indicated that a majority of the public favors a pause on further data center developments.
Despite this, a spokesperson for Google stated that the company remains committed to investing in Irish infrastructure to satisfy the rising demand for ICT services. The expansion would create hundreds of construction roles and approximately 50 permanent jobs once operational. The company previously warned that failing to secure approval would hinder its ability to meet the service demands of its Irish customer base.
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