Data centre · South Dublin · 53.3188, -6.4528
Amazon (AWS) Grange Castle South
operating Amazon (AWS) Our classification · status
61 MW
Average grid draw, 2025
up to ≈7% of the CSO data-centre total (upper bound)
565 MWth
On-site generation licensed
backup-diesel
2.1 ha
Building footprint mapped
3 buildings · OSM
€3m
Estimated rates a year
NAV €10.6m
2021
First completion certificate
Why we say it's operating
- EPA P1170: on-site generators licensed and in use (Licensable Activity Commenced)
- EPA P1184: on-site generators licensed and in use (Licensable Activity Commenced)
- Valuation list: property 10035918 rated as DATA CENTRE
- Valuation list: property 10035916 rated as DATA CENTRE
- Planning SD20A/0121: completion certificate 2021-08-30
Who runs it
- EPA licensee 'Amazon Data Services Ireland Limited' -> Amazon (AWS) (operator; high-confidence entity link from EPA)
- planning applicant 'UBC Properties LLC' -> Amazon (AWS) (development SPV; high-confidence entity link from BCMS, EPA, planning); lifecycle: commencement notices name DUB069/079/089 Amazon
- valuation list address names it
- some records attributed by co-location only (no operator in their own source)
Leaflet © OpenStreetMap contributors
Generators and power
| EPA licence | Status | Role | MWth | Plant | Permitted hours |
|---|---|---|---|---|---|
| P1170 | Licensed · Licensable Activity Commenced | backup-diesel | 460.87 | 70 x 6.49 MWth diesel standby + 3 x 2.19 MWth house generators (plus 2 x 0.57 MWth fire pumps) | 72 h/yr per generator at <=90% load; <=421.93 MWth simultaneously |
| P1184 | Licensed · Licensable Activity Commenced | backup-diesel | 103.84 | 16 x 6.49 MWth diesel standby (plus 1 x 0.45 MWth fire pump) | 100 h/yr at 90% load; <=90.86 MWth simultaneously |
What the annual environmental reports say
| Year | Licence | Grid MW avg | On-site fuel GJ | Full-load hours |
|---|---|---|---|---|
| 2023* | P1170 | 12.7 | 24 | 0 |
| 2024 | P1170 | 34 | 3,962 | 2.4 |
| 2025 | P1170 | 50.3 | 1,690 | 1 |
| 2023* | P1184 | 5.2 | 12 | 0 |
| 2024 | P1184 | 8.9 | 11 | 0 |
| 2025 | P1184 | 10.7 | 867 | 2.3 |
* part year. Full-load hours = fuel burned ÷ the whole fleet at full load, a derived figure.
What the planning and licence documents say
P1170 installation (Buildings A-C, 16.5 ha, full build-out) as primary figures; the adjacent leased single-building P1184 installation is given in notes.
| Spec | Value | Quote and source |
|---|---|---|
| On-site generation | backup diesel generators (plus house generators) | "there will be 70 no. 6.49 MWth diesel generators, 3 no. 2.19 MWth house generators" EPA P1170-01: Inspector's Report -LA007494, p.2 P1170 full build-out |
| Generating units | 73 units (derived) | "there will be 70 no. 6.49 MWth diesel generators, 3 no. 2.19 MWth house generators" EPA P1170-01: Inspector's Report -LA007494, p.2 derived: 70 + 3 (P1170, excl. 2 fire pumps); P1184 adds 16 x 6.49 MWth |
| On-site thermal input | 460.9 MWth (derived) | "the combined thermal input from the generators is 460.87 MWth" EPA P1170-01: Inspector's Report -LA007494, p.2 P1170; P1184 adds 103.84 MWth, campus ~564.7 MWth (derived) |
| Fuel | diesel / HVO | "The backup generators on the site operate on light fuel oil (Diesel) and Renewable Biomass (Hydrotreated Vegetable Oil (HVO))." EPA P1170-01: P1170-01-Annual Environmental Report-2025.pdf, p.15 P1170 AER 2025 |
| Running hours | 72 h/yr per generator | "limits the operation of each generator to 72 hours per year at no more than 90% load" EPA P1170-01: Inspector's Report -LA007494, p.11 P1170, <=421.93 MWth simultaneously; P1184 allows 100 h/yr |
| Cooling | evaporative (free cooling + evaporative AHUs) | "The AHUs can operate under two modes; Free Cooling and Evaporative Cooling." EPA P1170-01: Inspector's Report -LA007494, p.3 |
| Water | 3.1 m3/day (derived) | "Total Water Used 1,132.66 -87%" EPA P1170-01: P1170-01-Annual Environmental Report-2025.pdf, p.16 derived: 1,132.66 m3 in 2025 / 365 (P1170 only); P1184 used 2,469.87 m3 in 2025 |
| Floor area | 80,269 m2 | "Buildings A, B and C, with a gross floor area of 80,269sqm." EPA P1170-01: Inspector's Report -LA007494, p.2 P1170 full build-out (A 28,573; B 21,725; C 28,573 sqm) |
| Phasing | 3 buildings built in sequence (A, B, C) | "Once fully constructed the site will consist of three two-story data storage buildings" EPA P1170-01: Inspector's Report -LA007494, p.2 |
| Dates | A done Q1 2024; B first hall Q2 2024, complete Q4 2026; C Q1 2026-Q3 2028 | "Construction will commence in Q1 2026, and construction work is expected to be completed by Q3 2028." EPA P1170-01: Inspector's Report -LA007494, p.3 Building C dates quoted; A and B on same page |
| Heat reuse | heat export judged prohibitively costly (P1184 building) | "conducted a feasibility study for heat recovery and export at the installation and concluded that the costs of such a project were prohibitively high" EPA P1184-01: Inspector's Report, p.16 P1184 only |
| Renewables | on-site PV 219.45 kWe; CPPAs in three wind projects | "Renewables energy generated and used on site 219.45 kWe" EPA P1170-01: Inspector's Report -LA007494, p.17 CPPA mention on same page |
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? |
|---|---|---|---|---|
| 2020-07-16 | SD20A/0121 | Permission for a period of ten years for development at this site of 16.5 hectares that is located within lands in the Grange Castle South Business Park and includes the residential property of Ballybane, Old Nangor Road on land within the townlands of Milltown; Ballybane and; Aungierstown and Ballybane; and bounding Baldonnel Road to the west; both the Old and New Nangor Road to the north; and Grange Castle South Access Road to the South, Baldonnel, Dublin 22. The development will consist of the following: (1) The demolition of the existing two storey dwelling of Ballybane and associated farm | Grant Permission | completed (completion certificate) |
Sources for this page
osm:way/1456362258 · osm:way/1231964262 · osm:way/1443002192 · epa:P1170 · epa:P1184 · valuation:10035918 · valuation:10035916 · planning:SDCC/SD20A/0121
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.