Finland / Site
FIN04 · Myllykoski mega campus
Multi-building atNorth campus in the Myllykoski–Ummeljoki area of Kouvola. Municipal records establish construction and separate development parcels; YIT identifies FIN04A1 as a campus building. Planned campus capacity is reported as 430 MW, while the operator country page still reports 180 MW power supply. Actual operational capacity and commissioning dates remain unconfirmed.
Site / building photo
FIN04 Myllykoski construction-site overview, identified as a genuine site photograph by the commissioning contractor. Capture date and photographer not disclosed.
Published date unknown · Captured date unknown · Checked 2026-10-07
Research-selected property image; reviewer must confirm site identity, suitability and rights before publication.
determinova.fi · Source and attribution ↗Published by Determinova Oy; no explicit reuse license or photographer attribution found. Permission and intended-use rights require review before import. Publication and capture dates were not independently established.
Statements retain their dates, definitions and development scope. Do not add these rows together.
| Claim / measurement | Scope and status | As of | Evidence and accounting |
|---|---|---|---|
| 60 MW Unspecified power | Historical first phase Planned · incremental | 2023-12-07 | Reported claim ↗ Excluded from capacity totals. Announcement-date claim; delivery was targeted for second-half-2025, not established as achieved. Power basis is undisclosed. |
| 180 MW Unspecified power | FIN04 power supply on operator Finland overview Planned · unclear | 2026-10-07 | Conflicting claim ↗ Excluded from capacity totals. As-of is retrieval date because publication date is absent. Supply wording does not establish delivered grid connection or IT load; scope differs from the 430 MW facility page. |
| 430 MW Facility power | Ultimate FIN04 campus power capacity Planned · cumulative | 2026-10-07 | Reported claim ↗ Excluded from capacity totals. As-of is retrieval date of undated operator page. Classified as facility from campus-power wording; IT allocation and energized capacity remain unknown. Further expansion has no precise numerical claim. |
| 430 MW Unspecified power | Entire FIN04 campus planned total capacity Planned · cumulative | 2026-07-21 | Reported claim ↗ Excluded from capacity totals. Dated contractor announcement corroborates total campus scale but does not define electrical basis. Overlaps c3 and must not be added to it. |
Redeve reports an agreement placing atNorth development in the former mill area.
Supporting source ↗Original 60 MW phase target; no evidence reviewed establishes achievement.
Supporting source ↗Undated facility page retains this target, conflicting with the city's early-2027 expectation.
Supporting source ↗City's May 2026 update anticipates operational use in early 2027.
Supporting source ↗Approximately EUR 300 million FIN04 building contract; construction announced to begin immediately.
Supporting source ↗YIT target for this building, not an opening date for the entire campus.
Supporting source ↗YIT announces another campus building; its relationship to municipal phase numbering is unresolved.
Supporting source ↗Current operator marketing extent; earlier 21-hectare purchase and 23-hectare permit area concern narrower scopes. Contractor repeats 45 hectares.
Source ↗Advertised capability, not installed rack count.
Source ↗Published design specification.
Source ↗Delivery and recovered-heat quantity unconfirmed.
Source ↗Advertised design; named carriers unconfirmed.
Source ↗Permit scope, not total campus built area.
Source ↗Individual municipal permit parcel; do not substitute for campus total.
Source ↗Contractor describes future building energy supply; delivered mix unconfirmed.
Source ↗Source attribution does not imply independent verification or permission to reuse images.
Published Date unavailable · Retrieved 2026-10-07
Operator identifies FIN04 in Myllykoski, Kouvola, Finland; advertises 65 hectares, 430 MW campus power, colocation and build-to-suit services, and first-half-2026 readiness.
Published Date unavailable · Retrieved 2026-10-07
Country page still describes FIN04 as 65 hectares with 180 MW power supply, further expansion potential and second-half-2025 first-phase readiness.
Published 2023-12-07 · Retrieved 2026-10-07
Redeve reports a December 4 location agreement, 21 hectares purchased for atNorth development, and an initial 60 MW phase targeted for the second half of 2025. Redeve retained other industrial-park land.
Published 2025-05-28 · Retrieved 2026-10-07
City describes a 23-hectare development near the Kymijoki north of the former paper mill, with a 40,285 m² data-center building proposed for permit consideration.
Published 2026-02-11 · Retrieved 2026-10-07
Municipal permit item names atNorth Oy, parcel 286-423-20-2 at Lossitie 19, 46810 Ummeljoki, and three data-center buildings D, E and F, each with 12,740 m² floor area.
Published 2026-06-02 · Retrieved 2026-10-07
Permit decision identifies applicant atNorth Oy and a data-center development on parcel 286-423-20-1 at Lossitie 26, 46810 Ummeljoki; parcel area 357,961 m².
Published 2026-05-28 · Retrieved 2026-10-07
City describes the atNorth campus in Myllykoski and Ummeljoki as being built, with Ummeljoki phase 1 among the most advanced projects and intended to operate in early 2027.
Published 2026-07-21 · Retrieved 2026-10-07
YIT announces immediate construction of a FIN04 building, anticipated completion by end-2027, and planned total campus capacity of 430 MW.
Published 2026-08-28 · Retrieved 2026-10-07
YIT names FIN04A1 as another facility within FIN04 and distinguishes it from the building contracted in July. Construction and MEP works are included; no completion date is disclosed.
Published Date unavailable · Retrieved 2026-10-07
Regional authority identifies Kouvola within the Kymenlaakso region in southeast Finland.
Published Date unavailable · Retrieved 2026-10-07
Contractor describes 2026 commissioning work in the FIN04 construction environment, labels a site photograph separately from a rendering, and repeats an older 45-hectare campus description.
Published Date unavailable · Retrieved 2026-10-07
Operator offers FIN04 media resources and permits editorial, news and non-commercial use with attribution; public press contact is press@atnorth.com.
Published Date unavailable · Retrieved 2026-10-07
FIN04 Myllykoski construction-site overview, identified as a genuine site photograph by the commissioning contractor. Capture date and photographer not disclosed. Original image: https://determinova.fi/assets/references/myllykoski-site-overview.jpg
Name: Myllykoski data center – atNorth; YIT and atNorth expand collaboration with new data center at FIN04 campus in Kouvola
Aliases: Myllykoski data center – atNorth
Kind: Myllykoski data center – atNorth; YIT and atNorth expand collaboration with new data center at FIN04 campus in Kouvola
Country: Myllykoski data center – atNorth; YIT and atNorth agree on construction of a data center in Kouvola – value for YIT approximately EUR 300 million
Region: Kymenlaakso Region – Regional Council
City: Myllykoski data center – atNorth; Kaupunginhallituksessa käsiteltäviä asioita 1.6.
Operator: Myllykoski data center – atNorth; YIT and atNorth agree on construction of a data center in Kouvola – value for YIT approximately EUR 300 million
Business Model: Myllykoski data center – atNorth
Statuses: Kaupunginhallituksessa käsiteltäviä asioita 1.6.; YIT and atNorth agree on construction of a data center in Kouvola – value for YIT approximately EUR 300 million; YIT and atNorth expand collaboration with new data center at FIN04 campus in Kouvola
Summary: Myllykoski data center – atNorth; Finland Data Centres – atNorth; Rakentamislupapäätös 286-2025-384; Kaupunginhallituksessa käsiteltäviä asioita 1.6.; YIT and atNorth agree on construction of a data center in Kouvola – value for YIT approximately EUR 300 million; YIT and atNorth expand collaboration with new data center at FIN04 campus in Kouvola
Location: atNorthin datakeskus rakentamislupakäsittelyyn; Rakentamislupapäätös 286-2025-384; Rakentamislupahakemus 286-2026-178 – decision; Kaupunginhallituksessa käsiteltäviä asioita 1.6.
Stable identifier: e7dd87e3-c126-4b88-9eef-5f6c714e74a6