Data centre · South Dublin · 53.2947, -6.3677
Amazon (AWS) Belgard, Tallaght
operating Amazon (AWS) Our classification · status
46 MW
Average grid draw, 2025
up to ≈5.2% of the CSO data-centre total (upper bound)
83 MWe
Stated maximum demand
planning documents · a ceiling, not use
343 MWth
On-site generation licensed
backup-diesel
3.3 ha
Building footprint mapped
2 buildings · OSM
€2.4m
Estimated rates a year
NAV €8.4m
2019
First completion certificate
Why we say it's operating
- EPA P1173: on-site generators licensed and in use (Licensable Activity Commenced)
- Valuation list: property 5015885 rated as DATA CENTRE
- Valuation list: property 5020024 rated as DATA CENTRE
- Planning SD16A/0093: completion certificate 2019-07-17
- Planning SD18A/0219: completion certificate 2021-03-18
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'
- lifecycle: same site as Amazon's SD18A/0219 and ADSIL EPA licence P1173; inferred
- planning applicant
- 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 |
|---|---|---|---|---|---|
| P1173 | Licensed · Licensable Activity Commenced | backup-diesel | 343.16 | 27 x 6.46 + 26 x 6.49 MWth diesel standby | 72 h/yr at 90% load; <=317.26 MWth simultaneously |
What the annual environmental reports say
| Year | Licence | Grid MW avg | On-site fuel GJ | Full-load hours |
|---|---|---|---|---|
| 2023* | P1173 | 31.4 | 2,211 | 1.8 |
| 2024 | P1173 | 50.8 | 5,587 | 4.5 |
| 2025 | P1173 | 45.6 | 7,955 | 6.4 |
* part year. Full-load hours = fuel burned ÷ the whole fleet at full load, a derived figure.
What the planning and licence documents say
P1173 installation at Airton Road, Tallaght: two operating buildings (A 2017, B 2021) on c. 8.1 ha.
| Spec | Value | Quote and source |
|---|---|---|
| Electrical demand | 83 MWe | "thereby giving an overall maximum operational demand of 83 MWe for the installation" EPA P1173-01: Inspector's Report, p.2 Building A 35 MWe + Building B 48 MWe |
| On-site generation | backup diesel generators | "There are 27 no. 6.46 MWth diesel fired generators and 26 no. 6.49 MWth diesel fired generators" EPA P1173-01: Inspector's Report, p.2 |
| Generating units | 53 units | "While there is a total of 53 no. generators, 4 no. of the generators will serve as" EPA P1173-01: Inspector's Report, p.2 4 are 'catcher' (redundant) units |
| On-site thermal input | 343.2 MWth | "the combined thermal input from the generators is 343.16 MWth" EPA P1173-01: Inspector's Report, p.2 |
| Fuel | diesel / HVO | "The backup generators on the site operate on light fuel oil (Diesel) and Renewable Biomass (Hydrotreated Vegetable Oil (HVO))." EPA P1173-01: P1173-01-Annual Environmental Report-2025.pdf, p.14 AER 2025 |
| Running hours | 72 h/yr per generator | "restricted to 72 hours per year at 90% load, with no more than 317.26 MWth operating simultaneously" EPA P1173-01: Inspector's Report, p.9 |
| Cooling | evaporative | "The residual cooling water associated with the evaporative cooling process" EPA P1173-01: Inspector's Report, p.10 |
| Water | 5.4 m3/day (derived) | "Total Water Used 1,978.35 -43%" EPA P1173-01: P1173-01-Annual Environmental Report-2025.pdf, p.15 derived: 1,978.35 m3 in 2025 / 365; application projected 14,918 m3/yr |
| Phasing | 2 buildings (A, B), both operating | "The installation comprises 2 no. two storey data storage buildings (Building A and B)." EPA P1173-01: Inspector's Report, p.2 |
| Dates | Building A 2017; Building B April 2021 | "Building A) commenced operation in 2017, while the second data storage building (Building B) came into operation in April 2021" EPA P1173-01: Inspector's Report, p.2 |
| Heat reuse | up to 4 MW thermal to Tallaght District Heating Network | "it will provide up to 4MW of thermal energy to the Tallaght District Heating Network" EPA P1173-01: Inspector's Report, p.15 |
| Renewables | CPPAs in three wind projects | "its investment through Corporate Power Purchase Agreements (CCPAS) in three major wind projects" EPA P1173-01: Inspector's Report, p.15 |
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? |
|---|---|---|---|---|
| 2018-06-13 | SD18A/0219 | Two-storey c23,283 sq. m data storage centre, 27 carparking spaces and demolition of single storey building | Grant Permission | completed (completion certificate) |
| 2016-05-16 | SD16A/0093 | (1) The redevelopment of the former single storey c. 20,892sq.m Jacob's factory building for use as electrical rooms for electronic operations, mechanical plant rooms and support areas including loading bays, stores, offices and welfare facilities. The development will also contain new external plant areas including; (2) back up generators; (3) two electrical substations; (4) an electrical transformer compound with associated control rooms; (5) a sprinkler water tank and pump house; (6) a humidifier water tank compound and pump house; (7) a fuel tank compound and pump house; (8) a security ent | Grant Permission | completed (completion certificate) |
Appeal 302478 (SD18A/0219) · no decision recorded
Sources for this page
osm:way/37682585 · osm:way/825144681 · epa:P1173 · valuation:5015885 · valuation:5020024 · planning:SDCC/SD16A/0093 · planning:SDCC/SD18A/0219 · acp:302478
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.