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CARTIS

Google Hamina Data Center Campus

Hamina, Kymenlaakso, FinlandOperating
Evidence
Headline capacity
Not established in published records
Updated
Oct 28, 2026
Utility
Haminan Energia

On September 14, 2026, the City of Hamina confirmed that Google and the city had signed additional land-purchase deeds for potential campus expansion. The land acquisition is not evidence that new buildings have been constructed or commissioned; Google's separate Finland-wide investment programme is not wholly allocated to Hamina. Google's single former-Summa-paper-mill campus, including successive building expansions and heat-recovery infrastructure. Google Hamina Data Center Campus is in Hamina, Kymenlaakso, FI and is a data center campus with operational status.

Capacity

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Initial Summa mill conversionOperational

First operational phase.

Cumulative expansion through sixth buildingOperational

6 buildings

Sixth building was under construction in 2020; exact current count remains open.

EUR1 billion AI-era expansionUnder construction

No primary completion confirmation by cutoff.

Milestones (5)
Former Summa mill acquired

2009 · Recorded actual event

Completed · Event type not stated

Source not linked
First phase began operation

Sep 2011 · Recorded actual event

Completed · Event type not stated

Source not linked
Sixth building reported under construction

Sep 21, 2020 · Recorded actual event

Completed · Event type not stated

Source not linked
EUR1 billion expansion announced

May 20, 2024 · Recorded actual event

Completed · Announced

Source not linked
External heat recovery reported live

Jun 2, 2026 · Recorded actual event

Completed · Event type not stated

Source not linked

Participants

Google

Developer

Sources by role
Developer (1)
Developer (1)
Other participants (2)
City of Hamina

Government authority

Sources by role
Government authority (1)
Haminan Energia

Utility provider

Sources by role
Utility provider (1)
Utility provider (1)

Capital & incentives

Capital claims

Cumulative investment

Source report

€3,500 millions

Source

Incremental expansion investment

Source report

€1,000 millions

Source

Site & development

Building count by 2020

Source report

6 buildings

Source

Finland wind PPA portfolio

Source report

190 MW

Source

Technical specifications

Carbon free energy matching 2023

Source report

98 percent

Source

Cooling source

Source report

Gulf of Finland seawater

Source

Additional project facts

Mill acquisition year

Source report

2009

Source

First phase operating year

Source report

2011

Source

Heat recovery district demand share

Source report

80 percent

Source

Heat recovery households

Source report

2,000 households

Source

Infrastructure & permits

Technical details (3)
Cooling system

Operational

Cooling system uses seawater from the Gulf of Finland; volume not established.

Heat reuse

Operational

External district-heat delivery launched; expected to cover roughly 80% of demand.

Renewable energy supply

Secured or contracted

190 MW

Three Finland PPAs totaling 190 MW; supply measure, not campus load.

Permit · Status not stated

Hamina campus

City of Hamina

Sources (2)

Public-source research. Plans may change. See Evidence for sources and qualifications.