Data4 Frankfurt-Hanau / Großauheim campus
FJI source-qualified: four-document gate met, including project-specific government evidence. Qualification evidence and decisions →
Project status: Under construction; first-phase generator authorization recorded; energization unverified. Capacity scope: 180 MW company power reserve; city 180 MVA connection assumption is a different measure. How we verify evidence.
Compare this project → · Track its catalysts →
← Back to project index- Location
- Hanau-Grossauheim, Hesse, Germany
- Readiness
- Under construction — documented phase
- Capacity & scope
- 180 MW company power reserve; city 180 MVA connection assumption is a different measure
- Named companies
- Data4; Data 4 Germany S.à.r.l.; Brookfield; Hanau Netz; Stadtwerke Hanau; Mainova
- Next milestone
- Next-phase commissioning date not established
- Reviewed
- October 7, 2026
Approximate locality marker. Construction-stage classification does not mean every planned phase is permitted, energized or serving customers.
Investment takeaway
A brownfield Frankfurt-market campus combines September 2025 construction evidence with an attributed capital plan above €2 billion and a project-specific first partial generator authorization. Its power reserves and city connection assumptions do not establish delivered compute capacity.
Power and readiness
Company documents describe 180 MW power reserves. Hanau’s climate model instead uses 180 MVA connection capacity with a prospective 230 MVA ceiling; these are not interchangeable with operating IT load. Stadtwerke Hanau and Hanau Netz provide relevant infrastructure, while the neighboring 30 MWe CHP feeds the local grid rather than providing an exclusive 180 MW campus supply.
Capital and financing
Data4 increased its announced campus investment plan from more than €1 billion to more than €2 billion by September 2025. Brookfield ownership is documented in specialist reporting. No Hanau-specific closed lender facility was verified; platform capital pledges must not be assigned to the campus.
Company economic roles
Data4 is developer and operator; Data 4 Germany S.à.r.l. is the legal generator applicant. Brookfield is an indirect owner. Stadtwerke Hanau and Hanau Netz have infrastructure roles. Mainova is a planned waste heat counterparty. Engie’s documented contract is for the neighboring CHP, not a verified campus EPC contract.
Milestones
Acquisition and preparation were disclosed in 2023. Mainova disclosed a signed heat integration letter of intent August 29, 2024. Groundbreaking occurred September 15, 2025. The government portal records a June 17, 2026 decision for first partial standby generator authorization. The historical 2025 first-module target does not establish completed service.
Risks
Phase-specific approvals, electrical delivery, tenant leasing, brownfield construction and commissioning remain material. The full generator grant attachment returned 404, limiting review of conditions, amendments and appeal provisions.
What would change the assessment
Readable permit conditions, verified substation energization, first service and customer contracts would strengthen the assessment. Grid delay, appeal or capacity reduction would weaken it.
Unknowns
Full environmental conditions, amendments and appeals, energized load, ready-for-service date, tenant leases, site EBITDA, closed financing and electricity contract terms remain unverified.
Coverage and scope
Adds Frankfurt-market brownfield construction with project-specific regulator evidence. One Hanau campus; first generator authorization covers M1-M4, not whole-campus customer service.
Financial significance and assumptions
Data4 increased its announced campus investment plan from more than €1 billion to more than €2 billion by September 2025. Brookfield ownership is documented in specialist reporting. No Hanau-specific closed lender facility was verified; platform capital pledges must not be assigned to the campus.
Our analysis: construction can precede customer billing and cash returns. No utilization, pricing, margin or project earnings model is assumed. Investment plans, financing facilities and money spent are different quantities.
Government record audit
Regierungspräsidium Darmstadt · Record / evidence ↗. Reviewed October 7, 2026.
- Identifier
- RPDA - Dez. IV/F 43.1-53 u 35.14/38-2023/1
- Record type
- First partial generator authorization under BImSchG
- Applicant / entity
- Data 4 Germany S.à.r.l.
- Filed
- not established
- Decision
- 2026-06-17
- Status
- Authorization decision recorded by official portal; full grant attachment inaccessible (404)
- Phase scope
- Emergency generators for modules M1-M4 of a six-module campus
- Conditions / limits
- Application describes up to 360 operating hours per year and 457 MW thermal input. Do not present these as full granted conditions or IT load without reading the decision.
Source basis and claim audit
7 distinct reviewed documents. Primary evidence and independent reporting are identified below; syndicated releases count once. Sources establish only the stated claim, not whole-campus completion.
Data4 ↗ · Company construction disclosure. Published 2025-09-15; event 2025-09-15; reviewed October 7, 2026.
September 2025 groundbreaking; 25-hectare site; company 180 MW power capacity; planned investment increased above €2 billion.
DatacenterDynamics ↗ · Independent specialist reporting. Published 2025-09-17; event 2025-09-17; reviewed October 7, 2026.
Independent construction reporting; Brookfield-owned operator. Its 25-acre figure differs from primary 25 hectares and should not be copied.
Hessenschau/dpa ↗ · Independent public broadcaster. Published 2025-09-15; event 2025-09-15; reviewed October 7, 2026.
Public broadcaster reports groundbreaking and roughly €2 billion announced investment; includes regional Frankfurt context.
RP Darmstadt / UVP portal ↗ · Government project procedure. Published date not established; event not separately established; reviewed October 7, 2026.
Official portal records authorization decision June 17, 2026. First partial generator proceeding covers M1-M4: 64 diesel engines plus one house generator, 457 MW thermal input. Full decision attachment returned 404.
Mainova / Stadtwerke Hanau ↗ · Utility counterparty disclosure. Published 2024-08-29; event 2024-08-29; reviewed October 7, 2026.
Signed letter of intent with Data4 for waste heat integration via heat pump. Neighboring 30 MWe CHP feeds the local grid; it is not exclusive campus power supply.
CityofHanau ↗ · Government climate planning study. Published date not established; event not separately established; reviewed October 7, 2026.
2026 climate plan, printed page 99: Data4 180 MVA connection assumption with prospective 230 MVA ceiling. Model assumptions do not prove energization.
Data4 ↗ · Earlier company disclosure. Published 2023-02-15; event 2023-02-15; reviewed October 7, 2026.
Acquisition and preparation of 25 hectares; historical 2025 first-module and 2032 full-campus targets cannot prove completion.
Company investor information & quarterly statements
Corporate-disclosure certification held: Data4: held; Hanau Netz / Stadtwerke Hanau / Mainova: held; Research packet retains a corporate disclosure hold.
Data4
Campusdeveloper/operator
Disclosure verification held: Official investor and quarterly document coverage remains incomplete.
Hanau Netz / Stadtwerke Hanau / Mainova
Power/heatcounterparties; no exclusive supplyinferred
Disclosure verification held: Official investor and quarterly document coverage remains incomplete.
Private participant: Private/unlisted participant: no public quarterly financialstatements reviewed. No invented quarterlies or indirectparent exposure. Current ownership/private-status documentation remains tobeverified.
Private participant: Government,cooperative,academic,or nonlisted operatingcounterparty: no public quarterlystatement requirement assumed; applicable annual/interimreporting and entity structure need explicit documented exception.
Corporate disclosures provide company-wide context. They do not establish this project’s revenue, spending, profit, ownership share or operating capacity. Disclosure verification records →