DayOne Lahti Data Center Campus
About DayOne Lahti Data Center Campus
DayOne began construction of its Kiveriö campus in April 2026. The first building is planned for 50 MW of IT load within a 128 MW potential campus, with TikTok confirmed as principal tenant.
Capacity
Development
3 phases · 5 milestonesApplication covered a two-story data hall and ancillary buildings; construction later began.
1 building
50 MW IT design within the larger 128 MW potential site.
1 building
Future envelope only; no completed or contracted full-site capacity inferred.
Infrastructure
50 MW IT
First-building planned IT load; no operating capacity.
128 MW IT
Full campus potential only.
Power connection agreement and Eltel delivery contract; rating undisclosed.
€38,000,000 contract value
Contract value is not capacity, capex total or financing.
Design claim not operating performance.
Integration under exploration; no executed heat-offtake terms captured.
Project map
0 of 1 project point mappedNo map point available
Facts & sources
Published claims and their source links.