What does the Supreme Court’s refusal to hear the challenge mean for the data centre’s planning and procurement pathway?
The court’s finding
The Supreme Court has dismissed a leave to appeal application brought by Colin Doyle, Friends of the Irish Environment CLG, Futureproof Clare, Martin Knox and Christine Sharp. The objectors had challenged the High Court’s decision upholding planning permission granted by An Coimisiún Pleanála, or ACP, to Art Data Centres Ltd. The Supreme Court said the application did not meet the constitutional threshold for leave to appeal and found that, in the circumstances, no point of general public importance arose from the grounds put forward. The decision follows the High Court’s dismissal of a leave application in June.
The climate argument
The objectors argued that building the data centre, and failing to offset its greenhouse-gas emissions, raised an issue of general public importance in the context of climate targets. ACP responded that the fact a project may cause emissions was not, by itself, a basis for claiming exceptional circumstances. The Commission said that approach would ignore the steps it had taken to mitigate greenhouse-gas emissions. The Supreme Court’s decision does not establish that the emissions concerns were unfounded; it determines that the proposed appeal did not satisfy the constitutional test required for the case to proceed.
What changes for the project
ACP granted planning permission in April 2024 for six data halls on 145 acres beside the Tulla Road on the eastern outskirts of Ennis. Art Data Centres said the campus could generate up to 1,200 construction jobs and up to 1,000 permanent jobs during its operational life. Joint founders Tom McNamara and Vincent Fogarty said the scheme would use renewable energy, grid-supporting generation technology and heat recycling for agri-food and local heating schemes. They also said connection applications can now be finally processed and that work will commence in 2027 once all is in place.
The procurement lesson
The case illustrates the distinction between project approval and procurement. A planning permission determines whether development may proceed on the approved site; it is not itself a contract award or a competition between suppliers. A legal challenge to that permission can nevertheless affect the timing and certainty of later commercial or public-sector arrangements, including connections and construction activity. Here, the Supreme Court’s refusal to grant leave removes this particular appellate route after the High Court decision, while the project still depends on its connection applications being processed and on the remaining conditions described by the company.
IN NUMBERS
The ruling is a decision on access to a further appeal, not a finding that every environmental issue connected with the data centre has been resolved. The applicants’ climate concerns remain allegations in the case and nothing in the supplied ruling proves that they were correct or incorrect. For buyers, bidders and project partners, the immediate fact is narrower: the planning permission has survived the appeal applications described, and Art Data Centres says the next steps are connection processing followed by work planned for 2027.
Reported from rte.ie, 2026-10-12. The Tender Wire is published by Otnox.
