Data centres / Greece
Data centre projects in Greece
Pipeline projects125 permitted or being builtChecked 11 Oct 2026
Wholesale power price104 €/MWhDay-ahead, 2025 mean, GreeceCalendar year 2025
Grid carbon intensity324 g CO2/kWhYearly average, GreeceLatest full year
Next EU rule date14 Dec 2026The EU Commission's minimum performance standards consultation and call for evidence closesApplies EU-wide
Business electricity price157 €/MWhNon-household, with network charges and taxesLatest full year
These are the data-centre projects of 5 MW or more in Greece that our pipeline tracker follows: 12 projects, 5 of them permitted or already being built. Of these, 3 are under construction, and 4 are still at the announcement stage.
Largest stated project430 MWKaratzis data centre campus Ampelia, Orchomenos, total building load of all seven buildings (61.49 MW each)
Newest milestoneOct 2026latest check 11 Oct 2026
Projects by stage
- Announced4
- In planning3
- Under construction3
- Structure complete2
What the capacity figures measure
- IT load1
- Facility, campus or unstated basis7
- First phase only2
- No capacity published2
Each project’s capacity is quoted on its own stated basis, so the figures are never added together.
What changed
8 milestones in the last 90 days. The newest check was on 11 Oct 2026; each row below shows its own.
- Oct 2026Digital Realty ATH4 (Athens 4) inauguration of ATH4 planned for November 2026 Structure complete
- Oct 2026DATA4 Athens campus, first data centre first data centre expected to enter operation within weeks; second phase due within 2027 Structure complete
- Oct 2026Microsoft Greece cloud region data centres microsoft states its three data centre campus, one built by Microsoft and two by partners, is expected to be ready in Q4 2027; facilities in Spata and Paiania reported under construction Under construction
- Oct 2026Karatzis data centre at Kryoneri new Environmental Impact Study put out for public consultation In planning
- Oct 2026Kiefer data centre Megalopoli reported as expected to begin operation in early 2027, focused on AI applications Announced
Projects
Athens 2
| Project | Capacity | Stage and latest milestone | Checked |
|---|---|---|---|
| Gemini data centres (ADMIE and Serverfarm joint venture)Gemini (joint venture of ADMIE/IPTO and Serverfarm)Wider Athens area and other ADMIE properties | 130 MWtotal capacity of the planned data centres (up to)Stated as up to 130 MW across several sites | Announced Joint venture agreement signed to build and operate data centres on ADMIE properties, Dec 2024 | 10 Oct 2026 |
| Digital Realty ATH5 (Athens 5)Digital RealtyAthens area, site not stated by source | Not disclosed | Announced Digital Realty preparing ATH5, with construction possibly starting within 2027, Oct 2026Expected: Construction start possibly within 2027 | 10 Oct 2026 |
Elsewhere in Greece 10
| Project | Capacity | Stage and latest milestone | Checked |
|---|---|---|---|
| Digital Realty ATH4 (Athens 4)Digital RealtyKoropi, Attica | 7 MWadded capacity to the company's energy footprint, basis not specified | Structure complete Inauguration of ATH4 planned for November 2026, Oct 2026Expected: Inauguration in November 2026 | 10 Oct 2026 |
| DATA4 Athens campus, first data centreDATA4Paiania, East Attica (Agiou Louka 33) | 6 MWinitial IT capacity of the first data centreIT capacity to rise to 15 MW; DATA4 states 90 MW of available electricity reserves for the campus | Structure complete First data centre expected to enter operation within weeks; second phase due within 2027, Oct 2026Expected: Go live within the following weeks (as of 3 Oct 2026); phase 2 within 2027 | 10 Oct 2026 |
| Microsoft Greece cloud region data centresMicrosoft (one facility) with partners (two facilities)Spata and Paiania, East Attica | 25 MWtotal capacity of the Microsoft data centre investment in East Attica, as reportedSource does not say whether the 25 MW covers all three facilities; Microsoft has published no MW figure | Under construction Microsoft states its three data centre campus, one built by Microsoft and two by partners, is expected to be ready in Q4 2027; facilities in Spata and Paiania reported under construction, Oct 2026Expected: Campus ready in Q4 2027; customer use from early 2028 | 10 Oct 2026 |
| Data In Scale Spata data centreData In Scale (DAMAC/Edgnex 55%, PPC 45%)Spata, East Attica (opposite Smart Park) | 13 MWinitial capacity of the first phasePotential expansion to 25 MW per the same sources | Under construction Works started on the Spata site, Aug 2025Expected: Completion in 2026 | 10 Oct 2026 |
| Lancom data centre HeraklionLancomHeraklion, Crete | Not disclosed | Under construction Reported building a new data centre in Heraklion in March 2025; reported in September 2026 as developing a second data centre in Crete, location not named, Sep 2026 | 10 Oct 2026 |
| Karatzis data centre campus Ampelia, OrchomenosKaratzis GroupAmpelia site, Kastro, Municipality of Orchomenos, Boeotia | 430 MWtotal building load of all seven buildings (61.49 MW each)Seven identical buildings, each with 33.29 MW installed electromechanical power and 28.2 MW nominal IT load | In planning Environmental impact study prepared for a seven-building campus on 342,466 sqm, Feb 2026 | 11 Oct 2026 |
| PPC data centre at former Agios Dimitrios lignite plant (AWS lease)PPC (DEI); Amazon Web Services as tenantAgios Dimitrios, Kozani, Western Macedonia | 300 MWsupply power (ισχύ τροφοδοσίας) of the first phaseParties plan to explore expansion up to 1 GW subject to further agreements; first phase to be built in four 75 MW modules | In planning Binding memorandum of cooperation signed with AWS for a 15 year lease; permit pre-approval secured, environmental study under way and grid connection application submitted, Sep 2026Expected: First 300 MW phase operational by end of 2028; first commercial applications expected from 2027 | 10 Oct 2026 |
| Karatzis data centre at KryoneriKaratzi Data Centers S.A. (Karatzis Group)Kryoneri, Municipality of Dionysos, Attica | 39 MWinstalled capacity (26.090 MW IT equipment plus 12.982 MW electromechanical)Earlier plan for the same site under Tectum S.A. was 19.53 MW | In planning New Environmental Impact Study put out for public consultation, Oct 2026Expected: 18 month construction programme; no calendar dates given | 10 Oct 2026 |
| Kiefer data centre MegalopoliKieferMegalopoli, Arcadia | 10 MWcapacity, basis not specified | Announced Reported as expected to begin operation in early 2027, focused on AI applications, Oct 2026Expected: Operation expected in early 2027 | 10 Oct 2026 |
| Quadrivium Digital Hellas interconnection data centre ChaniaQuadrivium Digital Hellas (Prodea REIC to take 30%)Chania, Crete | 7 MWdata centre capacity (δυναμικότητα), basis not specifiedFuture expansion possible per the source | Announced Prodea REIC reported to plan a 30% stake in Quadrivium Digital Hellas and a bond loan of up to EUR 15 million; project in early stages, May 2026 | 10 Oct 2026 |
Formal refusals and bans since 2025
Verified decisions only. Absence is not evidence of low planning risk.
No formal refusal or ban recorded for Greece in this register. The register covers decisions we have verified, not every decision taken.
Decisions from 1 Jan 2025; statuses checked 11 Oct 2026.
Power and grid in Greece
Over a year, country level
Grid carbon, latest full-year average324 g CO2/kWh25th cleanest of 30 countries; 48% renewable or nuclear
Business electricity price, latest full year157 €/MWh13th cheapest of 26; wholesale is 81% of it
Wholesale power, 2025 average104 €/MWh20th cheapest of 30
Cooling degree days359 a year10-year national mean
Annual country averages, as used by the siting cost ranking. Production-based average carbon, not marginal.
Rules and dates
Next dates
- 14 Dec 2026the EU Commission's minimum performance standards consultation and call for evidence closes
- 15 May 2027EU database and French reports due every year
From the European data-centre regulation tracker.
Method
The pipeline covers data-centre projects of 5 MW or more, or with no capacity published, that are announced, in planning, permitted or under construction and not yet fully operating. It is not a list of operating facilities. A metro market follows the tracker’s own market field, so it includes the region around the city; a country page covers every tracked project in the country.
- Projects: each row is the latest public milestone we found for the project, with the date it was last checked; the pipeline tracker holds every project.
- Over a year: national averages for the latest full year, the same figures the siting cost ranking uses.
Cite as: ScienceShot, “Data centre projects in Greece”, https://scienceshot.com/data-centres/greece/ (checked 11 Oct 2026). © ScienceShot. You may quote individual facts with a link to this page.
ScienceShot dataset, checked 12 Oct 2026. How we build it: Method and standards.