Google Grange Castle Data Center Campus

Baldonnell / Clondalkin, Dublin, D, IrelandOperating

Headline capacity: Not established in published records
Updated: Oct 28, 2026
Utility: EirGrid

The official planning case register for appeal 320852 records permission with conditions for Google's DC3 expansion on September 23, 2026, following the August 2024 refusal and subsequent appeal. Conditional permission is not confirmation of construction or operation, and applicable conditions, including renewable-supply requirements, remain relevant. Google Grange Castle Data Center Campus — Existing Google Dublin campus with DC1 and DC2 operating phases and a DC3 expansion that received conditional permission on appeal after its earlier refusal. Google Grange Castle Data Center Campus is in Baldonnell / Clondalkin, Dublin, D, IE and is a data center campus with operational status.

Capacity

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

DC1Operational

1 building

First operating data center phase.

DC2 expansionOperational

1 building

EUR150 million second data center phase.

DC3 proposed expansionNot stated

1 building

72,400-square-metre proposed facility with eight halls; not operating.

Milestones (5)

Google DC1 opened

2012 · Recorded actual event

Completed · Commercial operation

Source not linked

Government marked EUR150 million data center expansion

May 8, 2018 · Recorded actual event

Completed · Commercial operation

Source not linked

Google submitted DC3 planning application

Jun 2024 · Recorded actual event

Completed · Event type not stated

Source not linked

South Dublin County Council refused DC3

Aug 22, 2024 · Recorded actual event

Completed · Event type not stated

Source not linked

Google lodged first-party appeal

Sep 18, 2024 · Recorded actual event

Completed · Event type not stated

Source not linked

Participants

Google Ireland Limited

Operator

Sources by role

Operator (1)

Dublin, Ireland — Google Data Center Location · Aug 6, 2026 · Primary

Operator (1)

Planning Appeal Case PL06S.320852 · Aug 6, 2026 · Corroborating

Other participants (3)

Arup

Contractor

Sources by role

Contractor (1)

DC3 EIAR Main Report Appendix 12.1 · Jun 1, 2024 · Primary

EirGrid

Utility provider

Sources by role

Utility provider (1)

Google Ireland lawyers claim council erred · Sep 25, 2024 · Primary

South Dublin County Council

Government authority

Sources by role

Government authority (1)

Planning Appeal Case PL06S.320852 · Aug 6, 2026 · Primary

Government authority (1)

Google refused permission for new Dublin data centre · Aug 27, 2024 · Corroborating

Capital & incentives

Operational

Google describes Dublin facility as using outside air for cooling.

Electric grid

Secured or contracted

Google appeal says import capacity was contracted in 2021; amount undisclosed.

Permit · Status not stated

DC3

South Dublin County Council

Aug 22, 2024

Sources (2)

Planning Appeal Case PL06S.320852 · Aug 6, 2026 · Primary
Google refused permission for new Dublin data centre · Aug 27, 2024 · Corroborating

Permit · Status not stated

DC3

An Coimisiún Pleanála

Sep 18, 2024

Sources (2)

Planning Appeal Case PL06S.320852 · Aug 6, 2026 · Primary
Google Ireland lodges appeal against data centre refusal · Sep 18, 2024 · Corroborating

Public-source research. Plans may change. See Evidence for sources and qualifications.