Data centre · Dublin City · 53.4056, -6.2233

Amazon (AWS) Clonshaugh

operating Amazon (AWS) Our classification · status

144 MW

Average grid draw, 2025

up to ≈16.5% of the CSO data-centre total (upper bound)

964 MWth

On-site generation licensed

backup-diesel

8.3 ha

Building footprint mapped

8 buildings · OSM

€6.6m

Estimated rates a year

NAV €22.8m

2021

First completion certificate

Why we say it's operating

EPA P1171: on-site generators licensed and in use (Licensable Activity Commenced)
EPA P1186: on-site generators licensed and in use (Licensable Activity Commenced)
Valuation list: property 733234 rated as DATA CENTRE
Valuation list: property 10028867 rated as DATA CENTRE
Valuation list: property 5027088 rated as DATA CENTRE
Valuation list: property 5027089 rated as DATA CENTRE
Valuation list: property 5027086 rated as DATA CENTRE
Valuation list: property 5027087 rated as DATA CENTRE

What's next on this site

permitted: Planning 3400/19: commenced (no completion certificate on a main building yet)

Who runs it

EPA licensee 'Amazon Data Services Ireland Limited' -> Amazon (AWS) (operator; high-confidence entity link from EPA)
OSM operator tag 'Amazon Web Services'
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
P1171	Licensed · Licensable Activity Commenced	backup-diesel	672.85	103 x 6.49 MWth diesel standby + 2 x 2.19 MWth (plus 4 x 0.45 MWth fire pumps)	72 h/yr; <=601.46 MWth simultaneously
P1186	Licensed · Licensable Activity Commenced	backup-diesel	290.95	40 x 5.44 + 10 x 6.49 + 1 x 3.6 + 1 x 2.19 MWth diesel standby (plus fire pumps); up from 219.12 MWth after 2026 review	150 h/yr at 100% load; <=248.11 MWth simultaneously (P1186-02)

What the annual environmental reports say

Year	Licence	Grid MW avg	On-site fuel GJ	Full-load hours
2023*	P1171	59.9	1,542	0.6
2024	P1171	103	7,844	3.2
2025	P1171	116.5	9,623	4
2023*	P1186	16.3	4,532	4.3
2024	P1186	27.3	1,635	1.6
2025	P1186	27.9	1,149	1.1

* part year. Full-load hours = fuel burned ÷ the whole fleet at full load, a derived figure.

What the planning and licence documents say

Two adjoining EPA-licensed installations: P1171 (Buildings A-F, 105 generators) and P1186 (Buildings W, X, Y + U, V after the 2026 review); figures are P1171 unless noted, with P1186 given in notes.

Spec	Value	Quote and source
Grid voltage	110 kV	"The site includes the Newbury 110 kV Substation, which is owned and under the control of the ESB." EPA P1186-02: LA-IR P1186-02 Amazon.pdf, p.6 P1186 part of campus; extension (Buildings U, V) fed from a separate ESB substation
Connection point	Newbury 110 kV GIS substation (ESB), plus separate ESB substation for Buildings U/V	"connection to an 110kV Gas Insulated Switchgear (GIS) Substation (Newbury Station)" EPA P1186-02: Attachment-1-2-Non Technical Summary_22.pdf, p.7 P1186 installation; P1171 substation not named
On-site generation	backup diesel generators	"there will be 103 no. 6.49 MWth diesel generators at the installation" EPA P1171-01: Inspector's Report, p.2 P1171; plus 2 x 2.19 MWth generators and 4 fire pumps; 11 are 'catcher' (redundant) units
Generating units	105 units	"The licence is for the operation of 105 no. generators as part of a data storage campus." EPA P1171-01: Inspector's Report, p.1 P1171 only; P1186 (post-2026 review) adds 52 back-up generators, campus ~157
On-site thermal input	672.9 MWth (derived)	"Given that the combined thermal input from the generators is 672.85 MWth" EPA P1171-01: Inspector's Report, p.2 P1171 only; P1186 adds 290.95 MWth (Attachment 4-4-1), campus total ~963.8 MWth (derived)
Fuel	diesel / HVO	"may operate using gas oil (diesel) or HVO (Hydrotreated Vegetable Oil) fuel, with a preference to use only HVO when supply is available" EPA P1186-02: LA-IR P1186-02 Amazon.pdf, p.10 P1186 review; P1171 AER also reports diesel + HVO
Running hours	72 h/yr per generator	"The operation of the generators is restricted to no more than 72 hours/year, at no more than 90% load" EPA P1171-01: Inspector's Report, p.9 P1171; P1186-02 allows 150 h/yr at 100% load, <=248.11 MWth simultaneously
Cooling	evaporative (free cooling + evaporative AHUs)	"The evaporative cooling system for the data halls operates in two modes; free cooling and evaporative cooling." EPA P1171-01: Inspector's Report, p.11 P1186 Building V uses refrigerant-based mechanical cooling instead
Water	8 m3/day (derived)	"Total Water Used 2,910.65 -86%" EPA P1171-01: P1171-01-Annual Environmental Report-2025.pdf, p.16 derived: 2,910.65 m3 in 2025 / 365 (P1171 only); P1186 used 2,563.18 m3 in 2025; licence application projected 17,879 m3/yr
Phasing	6 buildings A-F (A-D existing, E-F extension); P1186 adds U and V to W, X, Y	"When fully constructed the site will consist of 6 no. data storage installations (Building A to F)." EPA P1171-01: Inspector's Report, p.2 P1171
Dates	Building E 2023; Building F early 2024	"Building E is to be operational by 2023, and Building F is to be operational by the beginning of 2024." EPA P1171-01: Inspector's Report, p.2 P1171, as stated in 2023 inspector's report
Heat reuse	heat-recovery ready; no district heating network yet	"designed to facilitate the incorporation of heat recovery coils and an underground waste heat primary circuit, should a district heating system be developed" EPA P1171-01: Inspector's Report, p.14
Renewables	CPPAs in three wind projects; rooftop PV (26 kWe per building on E and F)	"its investment through Corporate Power Purchase Agreements (CCPAS) in three major wind projects" EPA P1171-01: Inspector's Report, p.15 PV: 26 kWe per building, p14

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?
2019-07-02	3400/19	Planning permission for development on a site of c. 0.025 hectares at Clonshaugh Business and Technology Park, Dublin 17. The site is located to the south of an existing data storage facility at the former Cahill Printers building (Building B). The proposed development comprises of a container compound for the purposes of providing ancillary modular plant, electronic equipment and machinery space. The development comprises 4 no. prefabricated metal containers (stacked to form 2 no. storeys), associated access arrangements and staircases, a boundary fence enclosure around the proposed developme	GRANT PERMISSION	commenced (no completion certificate on a main building yet)

Sources for this page

osm:way/47924356 · osm:way/68337136 · osm:way/47923380 · osm:way/697659634 · osm:way/1108073464 · osm:way/1047598884 · osm:way/1373868450 · osm:way/1108073465 · epa:P1171 · epa:P1186 · valuation:733234 · valuation:10028867 · valuation:5027088 · valuation:5027089 · valuation:5027086 · valuation:5027087 · valuation:10030755 · planning:DCC/3400/19

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.