Project record, phase
Google Grange Castle data centre extension (phase 3, Dublin)
Third phase of Google's campus at Grange Castle Business Park, south Dublin: a 72,400 sq m data centre on a 50 acre site. South Dublin County Council refused permission in August 2024 citing grid capacity and lack of on-site renewables. On appeal, An Coimisiún Pleanála granted permission (reported 28 September 2026), with conditions including evidence of power purchase agreement engagement before development and renewable fuel for backup generators. Google said in its appeal that EirGrid had given a grid connection in 2021. The decision could still face judicial review.
Reported figures
| Figure | What it measures | Delivery state | Scope and date | Used in totals | Source |
|---|---|---|---|---|---|
| 72,400 sq m Third-party reported | Floor or land area Building floor area as reported. Source wording: "construct the 72,400sq m data centre on the 50-acre site" | Permitted Stage stated in source: Permitted | phase 28 Sept 2026 | No. Area figures describe different things (site, floor or data hall area). Shown per record, never summed. | irishtimes.com (opens in a new tab) |
Each figure is shown as reported, with its own definition. IT, facility, grid and thermal figures are never added together. Capacity definitions.
Power and grid
Planning condition requires renewable fuel for backup generators (as reported). Grid connection reported as secured from EirGrid in 2021 per Google's appeal. irishtimes.com (opens in a new tab)
What changed
- 28 Sept 2026 Google wins appeal for Grange Castle extension in Dublin: An Coimisiún Pleanála granted permission for a 72,400 sq m extension at Google's Grange Castle campus after the council refused it in 2024, with conditions on PPAs and renewable backup fuel. Related: Google, Ireland. irishtimes.com (opens in a new tab)
Notes
Grid status set to offer because the appeal cites a 2021 EirGrid connection. Contract or energisation status not confirmed. Pre-dates CRU/2025236, so processed under the earlier policy.
Relevant policy
Sources (1), last checked 18 Oct 2026
- Google wins planning permission for Dublin data centre extension (opens in a new tab), The Irish Times, published 28 Sept 2026, accessed 18 Oct 2026
Last checked 18 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.