DayOne Lahti Data Center Campus
128 MW AI data center in Lahti, Finland: under construction.
- Capacity: 128 MW
- Location: Lahti, Finland
- Developer: DayOne
- Tenant: TikTok
- Status: under construction
DayOne Lahti Data Center Campus is a 128 MW AI data center project located in Lahti, Finland, currently under construction. It is being built by DayOne for tenant TikTok. This project is one of thousands of data-center facilities tracked by Data Center Index across Finland, covering operational, under-construction, announced, and permitted sites.
Project description
TikTok's second Finnish data centre, in the Kiveriö district of Lahti, will have an initial 50 MW and a potential total of 128 MW, operational by 2027. SRV said on 7 April 2026 that construction for DayOne in Kiveriö begins immediately, with operations during 2027.
Related data center projects
- DayOne Nurmijärvi Data Center Campus, 560 MW, Nurmijärvi, Finland · announced
- Arcem Joroinen Data Center Campus, 500 MW, Joroinen, Finland · announced
- atNorth FIN04 Campus, 430 MW, Kouvola, Finland · under construction
- Lappeenranta AI Factory, 310 MW, Lappeenranta, Finland, Finland · under construction
- Google Hamina, Finland AI Data Center Campus, 200 MW, Hamina, Finland · operational
- Compute Nordic Mikkeli AI Data Center, 165 MW, Mikkeli, Finland · under construction
- Hyperco Koria Data Center Campus, 150 MW, Kouvola, Finland · under construction
- Magnora Hämeenlinna AI Data Center, 120 MW, Hämeenlinna, Finland · permitted
Frequently asked questions
- What is DayOne Lahti Data Center Campus?
- DayOne Lahti Data Center Campus is an AI data center project in Lahti, Finland tracked by Data Center Index. Its status is under construction.
- Where is DayOne Lahti Data Center Campus?
- DayOne Lahti Data Center Campus is in Lahti, Finland.
- How big is DayOne Lahti Data Center Campus?
- Data Center Index tracks DayOne Lahti Data Center Campus at 128 MW. The developer or the press states that capacity, in a source dated April 8, 2026.
- Who is building DayOne Lahti Data Center Campus?
- DayOne is developing DayOne Lahti Data Center Campus, with TikTok named as the tenant.
- When will DayOne Lahti Data Center Campus come online?
- The next building at DayOne Lahti Data Center Campus is expected online 2027. That date is the first building going live, not the full build-out.
Sources
- TikTok is spending €1B on a second Finnish data centre (thenextweb.com · press · 2026-04-08)
- SRV (srv.fi · press · 2026-04-08)