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CARTIS

atNorth FIN04 Myllykoski Mega Data Center Campus

Kouvola, Kymenlaakso, FinlandUnder construction
Evidence
Planned / design
430 MW
Updated
Oct 28, 2026
Utility
KSS Energia

On August 28, 2026, YIT announced a contract to build FIN04A1, including mechanical, electrical and plumbing works, following a July agreement for another building at FIN04. These are construction contracts, not opening milestones. atNorth FIN04 Myllykoski Mega Data Center Campus, also known as atNorth FIN04, is a data center project in Kouvola, Kymenlaakso, FI associated with atNorth. 45-hectare greenfield campus; 430 MW published campus power capacity; first operations targeted for 2026. Renewable-energy mega campus designed for high-density workloads, liquid cooling and municipal heat reuse. 430 MW is the source-defined future IT or site design envelope.

Capacity

Reported capacity

Planned / design or future potential

430 MW

Source

Reported capacity

Planned / design or future potential

430 MW

Source

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

Development, permitting and phased deliveryUnder construction

430 MW is the source-defined future IT or site design envelope. It is not operating IT load.

Milestones (2)
atNorth announced FIN04 at Myllykoski

May 16, 2024 · Recorded actual event

Completed · Announced

Source not linked
Current project page targets first availability in first half 2026

H1 2026 · Forecast / planned record

Forecast · Forecast completion

Source not linked

Participants

atNorth

Developer

Sources by role
Developer (1)
Other participants (1)
KSS Energia

Utility provider

Sources by role
Utility provider (1)

Site & development

Location context

Actual

AtNorth FIN04 | Kouvola | Kymenlaakso | FI

Source

Location context

Actual

AtNorth FIN04 | Kouvola | Kymenlaakso | FI

Source

Location context

Actual

Kouvola, Kymenlaakso, FI

Source

Development detail

Actual

45-Hectare greenfield campus; 430 MW published campus power capacity; first operations targeted for 2026.

Source

Additional project facts

Lifecycle status

Actual

Construction

Source

Capacity basis

Actual

AtNorth publishes 430 MW of campus power capacity for FIN04; Cartis does not equate it with operating IT load.

Source

Lifecycle status

Actual

Construction

Source

Capacity basis

Actual

430 MW is the source defined future IT or site design envelope.

Source

Project identity

Actual

AtNorth FIN04

Source

Lifecycle status

Actual

Construction

Source

Capacity basis

Actual

430 MW is the source defined future IT or site design envelope.

Source

Infrastructure & permits

Technical details (2)
Electric grid

Planned or represented

Renewable-energy mega campus designed for high-density workloads, liquid cooling and municipal heat reuse.

Cooling system

Planned or represented

Cooling and efficiency claims remain limited to operator-described designs; no water use or delivered load is inferred.

Other · Under review

FIN04 Myllykoski

City of Kouvola

Aug 30, 2026

Sources (1)

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