Data Centres

Data Centres

Finland’s position as a preferred location for large-scale data centres creates significant opportunities for investors and developers. Our team’s comprehensive understanding of the Nordic data centre market, combined with our track record in landmark digital infrastructure projects, positions us as your trusted advisor in realising these opportunities.

Our multi-disciplinary team advises and works alongside leading data centre developers, investors, technology companies and energy providers to deliver successful outcomes in this rapidly expanding sector. We combine deep market knowledge with practical, solution-oriented advice that addresses the unique challenges of digital infrastructure projects while balancing commercial objectives with regulatory requirements.

Data centre projects require sophisticated coordination across multiple legal disciplines. Our integrated full-service approach draws on the firm’s leading expertise in real estate transactions, environmental and energy law, construction and projects, financing, and commercial contracting. This collaborative model ensures seamless service delivery and comprehensive risk management across all project phases.

Our experts guide clients throughout the project lifecycle, from initial site sourcing and land acquisition to environmental permitting, construction, and grid connection and power purchase arrangements. We handle complex regulatory frameworks on behalf of our clients, enabling them to focus on core business objectives while we manage the legal pathway to operational data centres.

We advise on:

  • Site identification, real estate due diligence and land transactions
  • Grid connection processes and power infrastructure agreements
  • Power purchase agreements (PPAs) and renewable energy arrangements
  • Environmental impact assessments and permitting strategies
  • Planning and zoning matters
  • Construction contracts and contractor arrangements
  • Data centre service agreements and customer contracts
  • Project finance, debt facilities and structured financing solutions
  • Joint ventures and partnership structures
  • Regulatory compliance and strategic advice on legislative developments

Latest references

Castrén & Snellman advised Nscale, a European AI infrastructure company, in connection with its planned data centre project in Harjavalta, Finland. The facility will be located in the Sievari industrial area. Castrén & Snellman’s advisory role encompassed the negotiation and execution of a site securing and development agreement (SSDA) with Fortum, as well as the preliminary land sale process for the Sievari site with the Town of Harjavalta. Under the SSDA, Fortum supports the advancement of Nscale’s project development, including grid connection design and permitting.
Case published 15.4.2026
We advised a leading global investment firm Brookfield, alongside a global sovereign wealth investor, on the Finnish law aspects of a EUR 1 billion holdco financing for DayOne Data Centers, a Singapore-headquartered developer and operator of hyperscale data centres. Structured as a seven-year secured holdco financing facility of €500 million, expandable to €1 billion – and secured by DayOne’s Finland platform – the financing will support the rollout of hyperscale developments in Lahti and Kouvola, providing nearly 300MW of planned capacity across Finland. The proceeds will also support DayOne’s global expansion across the EU and APAC, with flexibility to allocate to other key growth markets as required.
Case published 29.1.2026
We are assisting the Municipality of Tuusula in the sale of land to funds managed by Blackstone, a global asset management company, for a data centre project. Currently, a preliminary agreement has been signed for the sale of the approximately 16.7 hectare site in Jokela, Tuusula. In October 2025, the Municipal Council of Tuusula approved zoning amendments that enable the construction of a data centre campus in the Vallunlenkki zoning area. The preliminary agreement on the sale of the land and the approval of the zoning are the first steps in a process that would upon its implementation constitute a significant investment that supports employment and economic growth in Tuusula and its surroundings. The next phase, the environmental impact assessment, is planned to commence in early 2026. Blackstone owns QTS, one of the worlds’s fastest growing data centre platforms with more than 82 data centres in operation or under development across Europe and the United States.
Case published 4.12.2025
We advised the urban developer and construction company YIT on the drafting and negotiation of two construction agreements with the leading algorithmic trading firm XTX Markets for the development of two data centres in Kajaani, Finland, which are part of XTX Markets’ data centre complex. The first agreement, valued at approximately EUR 100 million and signed in December 2024, marked the commencement of the construction of the first data centre facility in Kajaani, establishing Kajaani as a strategic hub for high-performance computing infrastructure.  Building on the success of this collaboration, YIT and XTX Markets entered into a second agreement in August 2025 to commence construction of a second data centre facility. This phase includes the delivery of the shell and core of the new building.
Case published 20.11.2025