Getting a data centre through Ireland’s planning system has never been simple — but a renamed planning authority, a landmark climate law citation from the International Court of Justice, and a fast-growing string of legal challenges are now converging to make the process more consequential, and more contested, than ever.

A New Name, A New Structure

In June 2025, An Bord Pleanála — Ireland’s planning appeals body since 1976 — was formally restructured and renamed An Coimisiún Pleanála, as part of the phased commencement of the Planning and Development Act 2024. The rename marks a broader overhaul of how Ireland’s planning appeals process functions, at precisely the moment the volume and complexity of data centre planning applications is accelerating.

Large data centres already occupy a distinct legal category within Ireland’s planning system. Under a 2018 amendment to the Planning and Development Act 2000, facilities exceeding 10,000 square metres of combined gross floor space can apply for planning permission directly to the Strategic Infrastructure Division of what is now An Coimisiún Pleanála — bypassing local council planning authorities entirely. Industry groups, including the newly formed Irish Data Centre Supplier Alliance, have been actively lobbying government throughout 2026 to accelerate exactly this kind of streamlining, citing decision-making delays at appeals stage and complex flood-risk assessments as key obstacles.

When Planning Meets Climate Law

The most consequential recent development is unfolding in the courts rather than the Oireachtas. Irish planning decisions on data centres are increasingly being challenged not just on conventional grounds but on the basis that they conflict with Ireland’s own binding climate legislation. Section 15 of the Climate Action and Low Carbon Development Act 2015 requires public authorities, insofar as practicable, to exercise their functions consistently with the State’s climate goals. Ireland’s Supreme Court has already confirmed this section can meaningfully constrain a planning authority’s discretion.

That legal principle is now being tested directly in a live, closely watched case: Friends of the Irish Environment v An Coimisiún Pleanála, concerning the proposed Herbata Data Center, a multi-billion-euro development. The NGO’s challenge explicitly draws on the International Court of Justice’s landmark 2025 Advisory Opinion on climate change, which clarified that states may commit an internationally wrongful act where they fail to adequately regulate greenhouse gas emissions from private actors within their jurisdiction — a genuinely novel legal argument in the Irish context.

This isn’t isolated. In Colin Doyle v An Bord Pleanála, a coalition including FutureProof Clare and Friends of the Irish Environment challenged a data centre approval on both biodiversity grounds and Section 15 climate obligations, arguing the board had relied too heavily on speculative developer assurances about future backup generation fuel sources.

When the System Works Quickly

Not every planning story is one of delay and litigation. In Clare, An Bord Pleanála’s decision to grant permission for a six-hall data centre campus at Tooreen, near Ennis, was explicitly welcomed by Clare County Council as delivering on national enterprise strategy and local development plan objectives. The project illustrates that Ireland’s planning system continues to approve substantial new capacity outside the most grid-constrained parts of Dublin — with Cork, Galway, Wicklow, and Ennis identified as likely growth areas.

The 2018 Cautionary Tale Still Shapes Strategy

Ireland’s planning system has form when it comes to derailing major investment entirely. In May 2018, Apple abandoned its €850 million data centre plans in Athenry, County Galway, after roughly two years of appeals — a case that produced an important Supreme Court ruling on environmental impact assessment obligations that continues to shape how developers structure large applications today.

What This Could Mean for Ireland

Ireland’s reputation as a stable, predictable location for foreign direct investment depends significantly on the planning system delivering reasonably timely, legally durable decisions. A steady stream of climate-law-based legal challenges introduces genuine uncertainty into investment timelines at exactly the moment competing European jurisdictions are courting the same infrastructure investment. Equally, Section 15 climate litigation becoming a serious, court-tested constraint signals that Ireland’s climate commitments are becoming genuinely justiciable in a way that will shape how every major energy-intensive development gets planned and built in Ireland for years to come.

The Bottom Line

Ireland’s planning system for data centres sits at a genuine crossroads: an administrative rename and legislative streamlining push aimed at speeding up decisions, running directly alongside an escalating wave of climate litigation testing exactly how far Ireland’s own binding climate law can constrain individual infrastructure approvals. The Herbata case may prove to be the clearest test yet of whether Ireland’s climate legislation has real teeth at the level of individual planning decisions.