Data4 Athens Campus ATH01 - HERMES (Paiania)

Name: Data4 Athens Campus ATH01 - HERMES (Paiania)
Address: GR

Completed

Greece · 1 project · Last reported 2026-10-20

Summary

On 20 October 2026 DATA 4 GREECE finally submitted, in the state OPS-ADE system, a modified operation notification for its data centre DC01 at Agiou Louka 33, Paiania (action 609617), which the Region of Attica published on 23 October. The filing states that the spaces that have been completed, and for which Construction Inspection Certificate (Π.Ε.Κ.) 2688/08-07-2026 has been issued, total 8,908.42 m2: part of building K1 (the DC01 data centre, 8,550.85 m2 over part of the basement, ground and first floors), the K3 entrance gatehouse, the K5 HEDNO substation and the open-air car park. This supports completed construction of those scoped spaces as of 20 October 2026 only. The remainder of building K1 and any further campus buildings are not established as complete, and operation, customers and IT load in service are not established: a notification of operation is filed before the activity starts. evidence

Περιφέρεια Αττικής (Region of Attica); filing by DATA 4 GREECE Μονοπρόσωπη Α.Ε. in the OPS-ADE notification system · published 2026-10-23

Location

The interactive map needs JavaScript. Display anchor: 37.94419, 23.87281 (Point locator, WGS 84).

View location: OpenStreetMap · Google Maps · Bing aerial · Copernicus Browser

Campus reference; individual project footprints are not mapped.

Projects (1)

Data4 ATH01 - HERMES DC01 — completed first-phase data-centre spaces (part of building K1, with gatehouse and HEDNO substation)

Completed last observed as of 2026-10-20 · Authoritative status update

The Region of Attica's development-licensing notifications post publishes the modification of the operation notification for data centres of DATA 4 GREECE and attaches the OPS-ADE printout (uploads/2026/10/944.pdf, labelled 'ΣΧΕΤΙΚΟ ΑΡΧΕΙΟ'). evidence

Περιφέρεια Αττικής (Region of Attica) · published 2026-10-23

Printout of the original operation notification for data centres, action 559932, finally submitted 10/07/2026 12:44 by DATA 4 GREECE Μονοπρόσωπη Α.Ε. for the same installation 'Κέντρο Δεδομένων (DC01) (ΠΑΙΑΝΙΑΣ)', Agiou Louka 33, Paiania, with the same registered latitude 37.944187 and longitude 23.872813, 6,000 kW IT, 8,908.42 m2, and the same field-18 statement on the completed spaces (PEK 2688/08-07-2026; part of K1 DC01, K3 gatehouse, K5 HEDNO substation, car park). evidence

Περιφέρεια Αττικής (Region of Attica); filing by DATA 4 GREECE Μονοπρόσωπη Α.Ε. in the OPS-ADE notification system · published 2026-07-13

The Region of Attica post publishing the original operation notification for data centres of DATA 4 GREECE and attaching the OPS-ADE printout of action 559932. evidence

Περιφέρεια Αττικής (Region of Attica) · published 2026-07-13

Data4's Athens page describes 'DATA4 Greece Campus of Data Centers @ Athens - Peania' at Agiou Louka 33, 190 02 Peania, Greece, a campus 20 minutes from downtown Athens with land reserves of 7.5 ha and available electricity reserves of 90 MW; its map element places the campus marker at latitude 37.9429028, longitude 23.8735719. It describes Data4 as a group that finances, designs, builds and operates its own data centres. evidence

Data4 (DATA4 Group) · publication date not stated

The Diavgeia record (decision type 2.4.7.1, protocol 38076, status PUBLISHED) is titled: decision approving the environmental terms of the Data Centre Complex ATH01 - HERMES of the company DATA 4 GREECE M.A.E. at the position Fik Kokli - Pousi Chatzi - Viliza, at Ag. Louka 33, Municipality of Paiania, East Attica (PET 2509011421). The same ADA is listed as the environmental decision in both OPS-ADE printouts. evidence

Αποκεντρωμένη Διοίκηση Αττικής (Decentralised Administration of Attica), via Diavgeia · published 2026-06-12

Companies

Operator: DATA 4 GREECE Μονοπρόσωπη Α.Ε. (Data4 Greece) (intended) evidence

Source and location review

Status source

OPS-ADE: Τροποποίηση Γνωστοποίησης Λειτουργίας για Κέντρα Δεδομένων (Data Centers), DATA 4 GREECE, action 609617 of 20/10/2026 (published by the Region of Attica) evidence row
Περιφέρεια Αττικής (Region of Attica); filing by DATA 4 GREECE Μονοπρόσωπη Α.Ε. in the OPS-ADE notification system · published 2026-10-23 · Regulatory filing

Locator

Campus locator · Official source · official_activity_register_installation_point evidence

Source checks

Not reviewed against imagery not_reviewed
No imagery review is recorded for this project. Its status rests only on the dated authoritative source. · no independent imagery verification

Status age at review: 7 days before the data update on 2026-10-27

Location details

Coordinates: 37.94419, 23.87281
Geometry licence: public-record-source-terms
Use scope: Campus locator
Scope class: official_activity_register_installation_point
Authority: Official source
Source entity: Campus
Method: ops_ade_operation_notification_installation_coordinate_transcription
Derivation: direct_geometry
Precision scope: Installation coordinate registered in the state OPS-ADE operation-notification record of DATA 4 GREECE for 'Κέντρο Δεδομένων (DC01) (ΠΑΙΑΝΙΑΣ)' at Agiou Louka 33, Paiania, the address Data4 gives for its whole Athens campus. It locates the campus property, not building K1, an entrance or a parcel boundary.
Horizontal uncertainty: Not reported
The register states no datum or positional accuracy; the coordinate is read as WGS84, consistent with the operator's independent web-map marker 157.4 m away. The campus extent (about 7.5 ha) and parcel boundary are not published in an accessible record; decimal places are not accuracy.
Geometry evidence: 78c7580d

A locator places the site on the map. It is not a building footprint, a construction extent or a surveyed boundary unless the use scope is an official boundary, and even then it is a parcel or permit boundary.

Evidence

Sources are linked, not redistributed; each keeps its own terms. An archived copy is a lookup for the Wayback Machine capture nearest the retrieval date and may be unavailable or differ from what was reviewed. Each hash states what it covers; imported factual records are not publisher-page captures.

Evidence for Data4 Athens Campus ATH01 - HERMES (Paiania)
Title	Publisher	Roles	Published	Retrieved	Licence	Attribution	Content hash (SHA-256)
Data4: Our campus of data centers in Greece (Data Center Athens) - operator campus page Archived copy	Data4 (DATA4 Group) Operator website	Site and project identity	not stated	2026-10-26	all-rights-reserved	Data4	`3cd1429efe0e27c198efb2d3fc12774aebfcdbfb6037bf6cee9626fd4b4a94f2` Retained source material; see source provenance
Diavgeia open-data metadata for ADA 9ΚΧΧΟΡ1Κ-02Α: environmental-terms approval (ΑΕΠΟ) for the Data Centre Complex ATH01 - HERMES of DATA 4 GREECE M.A.E., Agiou Louka 33, Paiania Archived copy	Αποκεντρωμένη Διοίκηση Αττικής (Decentralised Administration of Attica), via Diavgeia Government record	Site and project identity	2026-06-12	2026-10-26	public-record-source-terms	Αποκεντρωμένη Διοίκηση Αττικής / Διαύγεια	`20e14aff75bba5555b56aeecfa76611239ee15157ec396a9e04c17b5c9f7229f` Retained source material; see source provenance
OPS-ADE: Γνωστοποίηση Λειτουργίας για Κέντρα Δεδομένων (Data Centers), DATA 4 GREECE, action 559932 of 10/07/2026 (published by the Region of Attica) Archived copy	Περιφέρεια Αττικής (Region of Attica); filing by DATA 4 GREECE Μονοπρόσωπη Α.Ε. in the OPS-ADE notification system Regulatory filing	Site and project identity	2026-07-13	2026-10-26	public-record-source-terms	Περιφέρεια Αττικής / Πληροφοριακό Σύστημα Άσκησης Δραστηριοτήτων και Ελέγχων (ΟΠΣ-ΑΔΕ)	`b21d62e47002ae6711684ac63ce64e96888294ea5d5f764c3f20b26ce58720b8` Retained source material; see source provenance
OPS-ADE: Τροποποίηση Γνωστοποίησης Λειτουργίας για Κέντρα Δεδομένων (Data Centers), DATA 4 GREECE, action 609617 of 20/10/2026 (published by the Region of Attica) Archived copy	Περιφέρεια Αττικής (Region of Attica); filing by DATA 4 GREECE Μονοπρόσωπη Α.Ε. in the OPS-ADE notification system Regulatory filing	Geometry, Physical status, Operator claim	2026-10-23	2026-10-26	public-record-source-terms	Περιφέρεια Αττικής / Πληροφοριακό Σύστημα Άσκησης Δραστηριοτήτων και Ελέγχων (ΟΠΣ-ΑΔΕ)	`f3c6431c95c34f85eeaf8f51334853f3acad6e2b62d591a48475d71647034a85` Retained source material; see source provenance
Region of Attica: ΓΝΩΣΤΟΠΟΙΗΣΗ ΛΕΙΤΟΥΡΓΙΑΣ ΓΙΑ ΚΕΝΤΡΑ ΔΕΔΟΜΕΝΩΝ (Data Centers) DATA 4 GREECE (post of 13 July 2026) Archived copy	Περιφέρεια Αττικής (Region of Attica) Government record	Site and project identity	2026-07-13	2026-10-26	public-record-source-terms	Περιφέρεια Αττικής	`ee3ba3adb92c9d4284e762ac2f0012202a591bda9575ed1d815511e93495862d` Retained source material; see source provenance
Region of Attica: ΤΡΟΠΟΠΟΙΗΣΗ ΓΝΩΣΤΟΠΟΙΗΣΗΣ ΛΕΙΤΟΥΡΓΙΑΣ ΓΙΑ ΚΕΝΤΡΑ ΔΕΔΟΜΕΝΩΝ (Data Centers) DATA 4 GREECE (post of 23 October 2026) Archived copy	Περιφέρεια Αττικής (Region of Attica) Government record	Site and project identity	2026-10-23	2026-10-26	public-record-source-terms	Περιφέρεια Αττικής	`123388539cd2336b12e582b33e5b486693490673ce4daaa084039285d6351bd4` Retained source material; see source provenance

Cite this site

Kyars, K. (2026). Data4 Athens Campus ATH01 - HERMES (Paiania) [site vcc-site-b373552fd2347b1b42eb]. In Data Center Atlas (2026-10-27) [Data set]. https://kiankyars.github.io/datacenter-atlas/sites/vcc-site-b373552fd2347b1b42eb/

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