First building at Data4’s Athens campus. The operator’s 90 MW electricity reserve is a separate campus metric.
Read overviewData4 Athens — DC1
Paiania, Attica, Greece
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7 cited sources · 6 utility and planning categories reviewed.
Review evidence and gapsReconcile the 80 MW assessed design, 90 MW reserve claim and DC1 allocation against the utility agreement.
Open the full checkOverview
First building at Data4’s Athens campus. The operator’s 90 MW electricity reserve is a separate campus metric.
- Developer / applicant
- Data4
- Owner
- Not verified
- Operator
- Data4 — intended operator
Planning and delivery status
Cap Ingelec confirms construction and Hill describes current construction-stage services. Neither undated case study establishes completion.
Stage source: Publication date unstatedProject intelligence. This record does not establish that the land or facility is available to acquire.
POWER STUDY
Power
What the power evidence establishes
The site-specific connection scope has not been established for this record.
Power classDNo qualifying rung
No same-scope, dated import-MVA rung has document-seen or better verification. Nearby infrastructure, IT MW and marketing claims cannot upgrade the class.
The class describes published documentary evidence at its stated date. It does not prove current contractual rights, transferability or an energisation date.
Class describes evidence maturity. Public records do not prove current contractual rights, transferable capacity or an energisation date. This record has not received a complete power study review.
Read the rules and verification levels01
Capacity ladder and evidence
Each rung is a separate MVA claim for its stated site or phase. A missing rung is unknown.
01
Applied
Unknown
Not established from the public records reviewed.
What applied mva is evidenced for the assessed site scope?02
Offered
Unknown
Not established from the public records reviewed.
What offered mva is evidenced for the assessed site scope?03
Accepted / contracted
Unknown
Not established from the public records reviewed.
What accepted or contracted mva is evidenced for the assessed site scope?04
Energised
Unknown
Not established from the public records reviewed.
What energised mva is evidenced for the assessed site scope?02
Conflicts and scope comparisons
No conflicting pair is recorded. This does not establish that all public statements have been reconciled.
03
Greece grid context
Network publications frame the claim. They do not allocate capacity to this site.
No country context entries have been linked to this site. Applicable policy, capacity information and reinforcement dependencies need review.
04
Derived energisation window
Earliest plausible yearUnknown
Latest plausible yearUnknown
The observed inputs do not establish a bounded delivery range. Open bounds stay unknown.
Rule
Use only a same-scope, dated, document-verified capacity rung and an applicable duration to energisation published by the observed site operator. The named process operator and a named source publisher must match that operator. Earliest year is the maximum of stage date plus minimum duration and each evidenced readiness constraint. Latest year is the maximum of stage date plus maximum duration and each published upper constraint only when every required input is bounded. An offer-processing duration is excluded. A missing required input leaves the affected bound unknown; no padding or contractual delivery promise is inferred.
No observed inputs establish this result.
Dependencies driving the range
- Connection-dependent reinforcement scope and completion dates: unknown.
- Grid-works planning status and programme: unknown.
- Applicable connection-policy conditions and programme: unknown.
What the earliest case requires
- Connection-dependent reinforcement scope and completion dates introduces no later constraint than the earliest case; this remains unverified.
- Grid-works planning status and programme introduces no later constraint than the earliest case; this remains unverified.
- Applicable connection-policy conditions and programme introduces no later constraint than the earliest case; this remains unverified.
Missing inputs leave the range open
- A dated, document-verified import-MVA rung for the assessed scope.
- An applicable duration from the evidenced stage to energisation, published by and matched to the observed site operator, rather than an offer-processing target.
- Connection-dependent reinforcement scope and completion dates
- Grid-works planning status and programme
- Applicable connection-policy conditions and programme
05
Indicative HV and connection capex
Unknown
Rule and scope
Sum each published complete scope quantity multiplied by the matching published benchmark minimum and maximum. Configuration, voltage, route type, unit, country applicability, currency and explicit price base year must match. No assumed route length, transformer count, exchange rate, inflation, fee uplift or partial index is inserted. The result is an indicative benchmark band, not an operator quotation or contractual connection charge.
No observed inputs establish this result.
Scope questions
- Obtain a published complete connection scope with voltage, configuration and measured quantities.
- Establish that every necessary connection-work component is included in the published scope.
- Identify network and customer works, upstream reinforcement, land and wayleaves, taxes, fees, securities, contingency and the price base.
06
Alternatives and policy exposure
Behind-the-meter generation
Unknown
Not established from the public records reviewed.
What behind-the-meter generation is evidenced, and at what scope?Planning / policy requirement
Unknown
Not established from the public records reviewed.
Does the applicable planning or connection policy require behind-the-meter generation?Battery storage
Unknown
Not established from the public records reviewed.
What battery storage is evidenced, and at what scope?Planning / policy requirement
Unknown
Not established from the public records reviewed.
Does the applicable planning or connection policy require battery storage?Private wire
Unknown
Not established from the public records reviewed.
What a private wire is evidenced, and at what scope?Planning / policy requirement
Unknown
Not established from the public records reviewed.
Does the applicable planning or connection policy require a private wire?Gas
Unknown
Not established from the public records reviewed.
What gas supply or generation is evidenced, and at what scope?Planning / policy requirement
Unknown
Not established from the public records reviewed.
Does the applicable planning or connection policy require gas supply or generation?Connection claim against current policy
Unknown
Not established from the public records reviewed.
Does the published connection claim meet the policy applicable to its application date, location and agreement status?07
Open questions for a Reality Check
Generated from unknown fields, missing derivation inputs and unresolved evidence. The questions identify the documents or specialist checks needed next.
60 questions to resolve
- Which TSO or DSO is responsible for this demand connection?
Not established from the public records reviewed.
- What is the operator-confirmed connection substation or circuit?
Not established from the public records reviewed.
- What voltage level is specified for the demand connection?
Not established from the public records reviewed.
- What are the evidenced site and connection-point coordinates, and their calculated straight-line distance?
Not established from the public records reviewed.
- What grid route length is published, and for which circuit?
Not established from the public records reviewed.
- What applied mva is evidenced for the assessed site scope?
Not established from the public records reviewed.
- What is the effective date of the applied connection evidence?
Not established from the public records reviewed.
- Which buildings or phases does the applied connection evidence cover?
Not established from the public records reviewed.
- What evidence level can be supported for capacityLadder.applied?
Verification has not been established.
- What offered mva is evidenced for the assessed site scope?
Not established from the public records reviewed.
- What is the effective date of the offered connection evidence?
Not established from the public records reviewed.
- Which buildings or phases does the offered connection evidence cover?
Not established from the public records reviewed.
- What evidence level can be supported for capacityLadder.offered?
Verification has not been established.
- What accepted or contracted mva is evidenced for the assessed site scope?
Not established from the public records reviewed.
- What is the effective date of the accepted connection evidence?
Not established from the public records reviewed.
- Which buildings or phases does the accepted connection evidence cover?
Not established from the public records reviewed.
- What evidence level can be supported for capacityLadder.accepted?
Verification has not been established.
- What energised mva is evidenced for the assessed site scope?
Not established from the public records reviewed.
- What is the effective date of the energised connection evidence?
Not established from the public records reviewed.
- Which buildings or phases does the energised connection evidence cover?
Not established from the public records reviewed.
- What evidence level can be supported for capacityLadder.energised?
Verification has not been established.
- What connection agreement type and current status are documented?
Not established from the public records reviewed.
- Does the agreement impose phased import-capacity limits?
Not established from the public records reviewed.
- What flexibility or curtailment obligations apply?
Not established from the public records reviewed.
- What on-site generation obligations apply?
Not established from the public records reviewed.
- What securities are required, posted and still valid?
Not established from the public records reviewed.
- What connection longstop or milestone dates apply?
Not established from the public records reviewed.
- What is the published IT load in MW?
Not established from the public records reviewed.
- On what electrical basis is the IT load in MW stated?
Not established from the public records reviewed.
- Which phase or campus does the IT load in MW cover?
Not established from the public records reviewed.
- What is the published facility load in MW?
Not established from the public records reviewed.
- On what electrical basis is the facility load in MW stated?
Not established from the public records reviewed.
- Which phase or campus does the facility load in MW cover?
Not established from the public records reviewed.
- What is the published import capacity in MVA?
Not established from the public records reviewed.
- On what electrical basis is the import capacity in MVA stated?
Not established from the public records reviewed.
- Which phase or campus does the import capacity in MVA cover?
Not established from the public records reviewed.
- What operator-published connection-to-energisation duration applies to this site and connection stage?
An application-to-offer processing target is not an energisation duration.
- Which reinforcements does the connection depend on, and what dates are published?
Not established from the public records reviewed.
- Which grid works require planning, and what is their current consent status and dated programme?
Not established from the public records reviewed.
- Which connection-policy conditions apply, and when could they be satisfied?
Not established from the public records reviewed.
- What complete connection scope is published: bays, stations, voltage, circuits, route lengths and underground or overhead configuration?
Not established from the public records reviewed.
- Is the published connection scope complete enough to match every component to a sourced benchmark?
Not established from the public records reviewed.
- What behind-the-meter generation is evidenced, and at what scope?
Not established from the public records reviewed.
- Does the applicable planning or connection policy require behind-the-meter generation?
Not established from the public records reviewed.
- What battery storage is evidenced, and at what scope?
Not established from the public records reviewed.
- Does the applicable planning or connection policy require battery storage?
Not established from the public records reviewed.
- What a private wire is evidenced, and at what scope?
Not established from the public records reviewed.
- Does the applicable planning or connection policy require a private wire?
Not established from the public records reviewed.
- What gas supply or generation is evidenced, and at what scope?
Not established from the public records reviewed.
- Does the applicable planning or connection policy require gas supply or generation?
Not established from the public records reviewed.
- Does the published connection claim meet the policy applicable to its application date, location and agreement status?
Not established from the public records reviewed.
- Which checked country-grid sources and location-specific constraints apply to this connection?
No country-context relationship has been established for this record.
- Identify network and customer works, upstream reinforcement, land and wayleaves, taxes, fees, securities, contingency and the price base.
Connection-cost scope question.
- Resolve the energisation input: A dated, document-verified import-MVA rung for the assessed scope.
This missing input leaves an energisation bound unknown.
- Resolve the energisation input: An applicable duration from the evidenced stage to energisation, published by and matched to the observed site operator, rather than an offer-processing target.
This missing input leaves an energisation bound unknown.
- Resolve the energisation input: Connection-dependent reinforcement scope and completion dates
This missing input leaves an energisation bound unknown.
- Resolve the energisation input: Grid-works planning status and programme
This missing input leaves an energisation bound unknown.
- Resolve the energisation input: Applicable connection-policy conditions and programme
This missing input leaves an energisation bound unknown.
- Obtain a published complete connection scope with voltage, configuration and measured quantities.
This scope or reference gap prevents a complete indicative connection capex band.
- Establish that every necessary connection-work component is included in the published scope.
This scope or reference gap prevents a complete indicative connection capex band.
Use these questions to scope a Power Reality Check.
Request an assessment of this record and the evidence needed next. Share only public information or documents you are authorised to provide.
Request a Reality CheckEarlier capacity notes and source context
15 MW unspecifiedProject capacity
DC1 design capacity named by contractor and project manager; the sources do not expressly identify IT versus facility basis.
Published claimProject source recordImport rights and connection evidence
The indexed council assessment describes three data-centre buildings with 80 MW total power, whereas the operator advertises 90 MW campus electricity reserves and the DC1 contractor quotes 15 MW without an electrical basis. Preserve these separate scopes; no original grid-import entitlement was inspected.
IT load, facility demand, import capacity and equipment ratings retain their stated scope. A published figure does not establish spare or transferable supply.
Planning & utilities
6 of 10 categories contain evidence. Each status applies to its specific claim.
Planning & decisions
Partial evidenceAttica's official meeting summary records a favourable regional EIA opinion on 2 March 2026, decision 43/2026, for DATA4's ATH01–HERMES at Agiou Louka 33, Paiania (PET 2509011421). An opinion is distinct from final AEPO environmental approval and a DC1 building permit. Full council PDFs returned 418; indexed official text was inspected.
Sources & next check
Grid & import rights
Partial evidenceThe indexed council assessment describes three data-centre buildings with 80 MW total power, whereas the operator advertises 90 MW campus electricity reserves and the DC1 contractor quotes 15 MW without an electrical basis. Preserve these separate scopes; no original grid-import entitlement was inspected.
Sources & next check
Ownership & development control
DocumentedDATA4 states that it finances, designs, builds and operates its own campuses, including Athens. The legal landholding entity is not disclosed on this page.
Sources & next check
Land, footprint & access
Partial evidenceDATA4 publishes a 7.5-hectare campus at Agiou Louka 33 in Paiania. The page does not identify the title entity or DC1 parcel footprint.
Sources & next check
Flood, ground & environment
Partial evidenceData4's 2025 combustion-emissions return, published in the Greek ministry's register, states its Paiania installation was not operating during 2025 and reported zero combustion emissions and energy input. This is an operator return to the regulator, not proof that environmental conditions were discharged or that DC1 was commissioned.
Sources & next check
Demand & location fit
Partial evidenceThe operator describes a highly connected Athens campus for cloud, telecom and multinational customers. No project-specific anchor customer or committed load is published.
Sources & next check
Not assessed
Land-use zoningFibre & dark fibreWater, cooling & heatProgramme & delivery
Evidence still needed
- Land-use zoning
The site boundary has not been matched to the current adopted zoning map and data-centre use policy.
- Fibre & dark fibre
No verified site entry, dark-fibre offer or physically diverse route assessment is recorded. Regional coverage alone is insufficient.
- Water, cooling & heat
Water availability and discharge, cooling technology, peak demand, heat reuse and utility agreements remain to be verified.
- Programme & delivery
Permission expiry, commencement, energisation, enabling works, long-lead procurement and phase handovers need a reconciled programme.
Project team
Appointments are limited to the project, phase and scope supported by each source.
Main contractor
Cap IngelecOther projects
Design and construction of the 15 MW data centre, 150 kV substation and campus infrastructure, working with local partners.
Appointment sourceProject manager
Hill InternationalOther projects
Pre-construction technical advice and permits support; construction PMC, procurement, cost/schedule, QA/QC and commissioning support.
Appointment sourceUnlisted roles have no project-specific appointment recorded.
Sources
Publication dates are shown where known. Review dates do not establish approval or commissioning.
- Cap Ingelec — Athens Data4 construction and design scopecapingelec.com · Publication date unstated
- Hill International — Data4 Athens DC1 management scopehillintl.com · Publication date unstated
- Data4 — Athens campus location and power reservesdata4group.com · Publication date unstated
- Attica Regional Council — 2 March 2026 meeting summary, decision 43/2026; indexed official text, direct retrieval returned 418patt.gov.gr · 2 Mar 2026
- Attica Regional Council — opinion 43/2026 on ATH01–HERMES, PET 2509011421; indexed official textpatt.gov.gr · 2 Mar 2026
- Greek environment ministry — Data4 Greece 2025 combustion-emissions return; letter date unstatedypen.gov.gr · Publication date unstated
- Greek environment ministry — medium-combustion-plant register and operator returnsypen.gov.gr · Publication date unstated
Original documents and maps retain their rights. Public access does not grant commercial redistribution rights.