Data centre · South Dublin · 53.3166, -6.4563
CyrusOne Grange Castle South
operating CyrusOne Our classification · status
1 ha
Building footprint mapped
1 buildings · OSM
2021
First completion certificate
Not available for this site: measured grid draw (no EPA annual report: only sites with ≥50 MWth of plant file one); rates (no valuation-list entry matched).
Why we say it's operating
- Planning SD18A/0134: completion certificate 2021-06-28
- Planning ABP-309146-21: completion certificate 2022-06-23
What's next on this site
- under construction: Planning SD20A/0295: commencement notice 2021-05-18, no completion certificate
- permitted: Planning SD19A/0300: commenced (no completion certificate on a main building yet)
- permitted: Planning SD18A/0134/EP2: unstarted, permission live
- permitted: Planning SD20A/0295/EP: unstarted, permission live
Who runs it
- OSM operator tag 'CyrusOne'
- planning applicant
Leaflet © OpenStreetMap contributors
What the planning and licence documents say
CyrusOne two-storey, 4-data-hall data centre plus office at Grange Castle South (ABP-302813-18, granted 2019); no power demand figure stated in the documents.
| Spec | Value | Quote and source |
|---|---|---|
| Grid voltage | 110 kV | "The intended supply arrangement will be from 2 no. 110kV feeders from the EirGrid substation which will be routed to the on-site substation." ACP 302813 inspector report, p.48 |
| Connection point | new on-site 110kV substation fed from adjoining EirGrid West Dublin 220/110kV substation | "It is proposed to construct an on-site substation to transform the voltage from the 110kV feed to 20kV." ACP 302813 inspector report, p.48 EirGrid 220/110kV substation lies to the north-east (p4). |
| On-site generation | containerised standby diesel generators | "32 containerised standby diesel generators with 2 associated flues per generator (64 in total)" ACP 302813 inspector report, p.5 |
| Generating units | 32 units | "32 containerised standby diesel generators with 2 associated flues per generator (64 in total)" ACP 302813 inspector report, p.5 |
| Fuel | diesel | "32 containerised standby diesel generators with 2 associated flues per generator (64 in total)" ACP 302813 inspector report, p.5 |
| Cooling | chillers (32 roof-gantry chillers) | "There are proposed to be 32 acoustically attenuated chillers located on the upper level plant gantries" ACP 302813 inspector report, p.5 Cooling medium (air/water) not stated. |
| Floor area | 32,419 m2 | "The two storey data centre facility and delivery bay (32,419sq.m)" ACP 302813 inspector report, p.5 Data centre block only; total incl. 3-storey office 35,426 m2. |
| Data halls | 4 halls | "a single data hall on each floor of each block with service and technical space around each data hall (4 data halls overall)" ACP 302813 inspector report, p.5 |
| Dates | 14-18 month construction period (permission 2019) | "The potential implementation of the new data hall will occur over a 14-18 month construction period." ACP 302813 inspector report, p.33 |
| Heat reuse | future-proofing for district energy connection (planning condition) | "to facilitate future connection to district energy networks in the area" ACP 302813 Board order, p.14 Heat Recovery Feasibility Report submitted with application. |
Every value is quoted from the document and page cited; the quote was checked against that page's text. "Derived" means the reader worked it out from stated figures (shown in the quote). Planning and licence figures are design or permitted values, not measured use; values derived from an EPA annual environmental report (AER), mostly water, are reported use for that year. The note under each quote gives the scope and whether a demand figure is a maximum or an average.
Planning history
| Received | Ref | What | Decision | Built? |
|---|---|---|---|---|
| 2026-04-02 | SD20A/0295/EP | Amendments and modifications to the permitted data centre development granted under Reg. Ref. SD18A/0134 - ABP Ref. ABP-302813-18 and the temporary substation permission granted under SD19A/0300 to include: Demolition of the two storey dwelling of Weston House; single storey dwelling and outbuildings/ stables of Weston Lodge; and the single storey dwelling and converted garage of Kent Cottage. Retention of sprinkler tank and pump house to the south-west of Building A Data Centre to replace 4 sprinkler tanks; Retention of 40kW(p) PV panels on the roof of Building A Data Centre; Retention of rev | Grant Extension of Duration of Permission | unstarted, permission live |
| 2023-09-15 | SD18A/0134/EP2 | Demolition of the existing single storey house of 'Erganagh' and the construction of a two storey data centre and delivery bays with associated three storey office block and services that will have a gross floor area of 35,426sq.m on an overall site of 9.2 hectares. The two storey data centre facility and delivery bay (32,419sq.m) will be separated into two adjoined blocks over two floors with a single data hall on each floor of each data centre with service and technical space around each data hall (4 data halls overall) with a two storey delivery bay attached to the east of the data centre b | Grant Extension of Duration of Permission | unstarted, permission live |
| 2023-07-14 | SD18A/0134/EP | Demolition of the existing single storey house of 'Erganagh' and the construction of a two storey data centre and delivery bays with associated three storey office block and services that will have a gross floor area of 35,426sq.m on an overall site of 9.2 hectares. The two storey data centre facility and delivery bay (32,419sq.m) will be separated into two adjoined blocks over two floors with a single data hall on each floor of each data centre with service and technical space around each data hall (4 data halls overall) with a two storey delivery bay attached to the east of the data centre b | Refuse Ext. of Duration of Permission | refused |
| 2021-02-17 | SD20A/0295 | Amendments and modifications to the permitted data centre development granted under Reg. Ref. SD18A/0134 - ABP Ref. ABP-302813-18 and the temporary substation permission granted under SD19A/0300 to include: Demolition of the two storey dwelling of Weston House; single storey dwelling and outbuildings/ stables of Weston Lodge; and the single storey dwelling and converted garage of Kent Cottage. Retention of sprinkler tank and pump house to the south-west of Building A Data Centre to replace 4 sprinkler tanks; Retention of 40kW(p) PV panels on the roof of Building A Data Centre; Retention of rev | Grant Permission & Grant Retention | commenced (no completion certificate on a main building yet) |
| 2021-01-21 | ABP-309146-21 | The proposed development primarily comprises the provision of two 110kV transmission lines and a 110kV Gas Insulated Switchgear (GIS) substation compound along with associated and ancillary works and is described as follows: The proposed 110kV GIS Substation Compound is to be located on lands to the north-east of the two storey data centre facility and associated three storey office block that was permitted under SDCC Reg. Ref. SD18A/0134/An Bord Pleanála Ref. ABP-302813-18, and within an overall landholding bound to the north by the Grange Castle South Business Park access road; to the west b | Grant Permission | completed (completion certificate) |
| 2020-09-24 | SD20A/0244 | Retention of single storey client control room (248.5sq.m) associated with the planned future substation that will be located to the north-east of the permitted data centre development granted under Reg. Ref. SD18A/0134/ABP Ref. ABP-302813-18; the development will form an amendment and modification of the permission granted for a single storey transformer building (125sq.m) under Reg. Ref. SD18A/0134/ABP Ref. ABP-302813-18; no other changes to the permission granted under this decision are proposed under this application on a site within the townland of Aungierstown & Ballybane. | Grant Permission for Retention | lapsed without commencement notice |
| 2019-09-24 | SD19A/0300 | Single storey ESB substation (27sq.m) that will be accessed from the north off the Grange Castle South Access Road via the Baldonnel Road and off the permitted internal road granted under Reg. Ref. SD18A/0134, An Bord Pleanála Ref. ABP-302813-18 to the south; the proposal will result in a minor and temporary amendment to the landscaping and fencing permitted under Reg. Ref. SD18A/0134, An Bord Pleanála Ref. ABP-302813-18 that granted permission for a two storey data centre and delivery bays with associated three storey office block and services within the overall lands; no other changes to the | Grant Permission | commenced (no completion certificate on a main building yet) |
| 2018-07-30 | SD18A/0134 | Construction of a two storey data centre and delivery bays with associated three storey office block and services. | Grant Permission | completed (completion certificate) |
Appeal 302813 (SD18A/0134) · grant, 2019-04-18
Issues: residential amenity / visual (third party neighbours) · noise · flood risk
"32 containerised standby diesel generators with 2 associated flues per generator (64 in total)" p.5
Sources for this page
osm:way/868909749 · planning:SDCC/SD18A/0134 · planning:SDCC/SD19A/0300 · planning:SDCC/SD20A/0244 · planning:SDCC/ABP-309146-21 · planning:SDCC/SD20A/0295 · planning:SDCC/SD18A/0134/EP · planning:SDCC/SD18A/0134/EP2 · planning:SDCC/SD20A/0295/EP · acp:302813
Joined from OpenStreetMap, the planning register, An Coimisiún Pleanála, EPA licences and annual reports, the Tailte Éireann valuation list and Building Control. Data built 2026-10-10.