Elina Marttala

Senior Associate, Member of the Finnish Bar

I advise domestic and international clients in real estate transactions, development projects, lease agreement negotiations, sale and leaseback arrangements and questions related to managing real estate properties. I strive to provide solution-oriented and efficient assistance to our clients with the ultimate aim of helping them achieve their goals.

Working in a real estate investment and development company during a secondment provided me with valuable insight on the client perspective and with first-hand experience of the client’s expectations towards legal advisors. I find it rewarding to be able to provide tailored assistance in each project by truly understanding the clients’ business and the extent of their need for our expertise.

I have worked as a trainee at another business law firm specialising in environmental and real estate legislation. There, I participated in environmental and energy assignments that were mainly related to renewable energy, regulation on electricity market, mining and environmental permit appeals. During my studies I also deepened my expertise in land use and environmental legislation by working at the mining authority as a permit processor and on the legal team of an infrastructure and construction service company.

Latest references

We advised A. Ahlström Real Estate Ltd in its acquisition of an office complex in Pasila, Helsinki, from Avain Yhtiöt Oy. The office complex is part of a new block area that will also include three tower blocks. Construction of the block has started in early 2025 and the office building is expected to be completed by the end of 2026. The office building is located in Central Pasila, in the immediate vicinity of the Tripla shopping centre, with excellent transport connections. The office will provide modern and adaptable office space for up to 450 employees. The anchor tenant in the new premises is Avain Yhtiöt. A. Ahlström Real Estate manages the real estate and forest assets of A. Ahlström Oy. Avain Yhtiöt is a Finnish housing provider specialising in developing, constructing, and managing residential properties and housing services. Under the Avain Asunnot brand, Avain Yhtiöt and Avain Asumisoikeus own over 12,000 rental, right-of-occupancy, and service housing units across Finland.
Case published 18.3.2025
We advised the real estate investor and developer Nrep in a EUR 100 million construction project in Helsinki, which combines build-to-rent housing and care homes within the one scheme. A fund managed by Nrep (NSF V) purchased the plot of land in Herttoniemi, Helsinki and subsequently secured planning consent to deliver a hybrid living scheme. The modern complex will offer high-quality housing and care facilities for the elderly alongside rental accommodation. We advised Nrep in both the purchase of the plot and the contracting of the care and housing complex. A total of 425 apartments and 108 care homes will be delivered across four buildings on the site. Construction is scheduled to begin in autumn 2025, with delivery targeted in 2028. The project will be implemented in accordance with Nrep’s principles of sustainable construction. The buildings will be equipped with solar panels, geothermal heat will be used throughout, and low-emission green concrete and steel will be used as materials. 
Case published 6.3.2025
We are assisting Verne Global Ltd, the leading provider of sustainably powered HPC data centers in the Nordics, in developing a data center in Mäntsälä, Finland. We advised Verne in acquiring the real estate company managing the Mäntsälä site, as well as in the subsequent acquisition of the site itself. Our assistance extends beyond real estate transactions to include permitting and tax-related matters. Additionally, we advise Verne on grid connection and electricity supply matters. The acquisition of the project site in Mäntsälä marks Verne’s fourth data center in Finland, reinforcing its position as a leader in sustainable and scalable data center solutions. The Mäntsälä campus, spanning 10 hectares and located just a 40-minute drive from Helsinki-Vantaa International Airport, will initially offer a capacity of 70 MW. The facility is designed to support data-intensive enterprises and AI innovators running HPC, machine learning, and other high-intensity workloads, all while operating exclusively on renewable energy. Verne’s new facility will adhere to the company’s best practice design principles, focusing on maximizing efficiency and minimizing environmental impact. The campus will be powered entirely by renewable energy sources, and waste heat generated by the data center will be utilized for local community heating projects. The company is working closely with the Mäntsälä Municipality to ensure the new facility benefits the local area, including plans to harness waste heat for district heating. Construction of Verne’s Mäntsälä data center is set to begin in mid-2025 and is expected to take two years to complete. This expansion is a strategic move in Verne’s long-term plan to build out its sustainably powered data center platform, which was acquired by Ardian, a world-leading private investment house, in early 2024. Ardian has already invested over EUR 1.6 billion in the Nordics, focusing on energy transition and digital infrastructure projects, and is working with Verne to drive sustainable growth across the region.  Read Verne Global’s press release.
Case published 20.2.2025
We are assisting Verne Global Ltd, the leading provider of sustainably powered HPC data centers in the Nordics, in expanding a data center in Helsinki region, Finland. In the autumn of 2024, we acted as Verne’s advisor in acquiring the land at its existing Helsinki data center campus, securing room for future expansion. In addition to real estate development, our advice covers permitting and construction related legal matters. The expansion marks another milestone in Verne’s ambitious growth strategy for the Nordics, following the recent announcement of its new facility to be built in Mäntsälä, Finland. The land was acquired from Onvest, a family-owned company with a long history in the region. The site’s strategic location provides excellent connectivity to power and fibre networks, proximity to Helsinki Airport, and easy access to the city centre – making it ideal for organisations across industries looking for reliable, accessible, and well-connected facilities. Verne plans to develop the site further, leveraging its 70MW capacity to meet the increasing demand for sustainable, high-performance compute infrastructure. Designed with high-density compute in mind, the planned expansion will include two new buildings fully equipped to meet the technical requirements of AI, HPC, and other intensive workloads. Verne remains committed to sustainability, with the Helsinki campus running on 100% renewable energy. Waste heat generated by the data center is repurposed through a direct connection to the local district heating network. All new facilities will be built to support liquid cooling, enabling efficient management of the high heat levels generated by AI and other intensive compute workloads. Additionally, Verne uses renewable diesel for its backup power generators in Finland, reducing greenhouse gas emissions from the generators by an average of 90%. News: Verne expands Helsinki data center campus with strategic site acquisition. Read Verne Global’s press release.
Case published 20.2.2025
Castrén & Snellman is acting as the legal advisor to the City of Pori in its sale of a 49% stake in Pori Energia to Polhem Infra. Pori Energia, a multi-utility company, operates in various sectors including district heating, electricity distribution, and electricity generation through CHP and renewable sources. The company also provides wind power services and industrial energy solutions in the Satakunta region. This strategic partnership between the City of Pori and Polhem Infra aims to enhance Pori Energia’s financial stability and investment capabilities, enabling the company to further its efforts in the energy transition and continue delivering high-quality energy services to its customers. Polhem Infra, owned by Swedish state pension funds, focuses on investments in critical infrastructure, including renewable electricity generation, energy storage, energy distribution, digital infrastructure, and transport infrastructure. The transaction values Pori Energia at EUR 905 million. 
Case published 31.1.2025
We acted as the lead counsel to Fortum in a cross-border transaction in which Fortum sold its recycling and waste business. The business was sold to thematic impact investing firm Summa Equity through its portfolio company NG Group. The debt-free purchase price is approximately EUR 800 million.  Fortum’s recycling and waste business to be sold comprises municipal and industrial waste management and end-to-end plastics, metals, ash, slag and hazardous waste treatment and recycling services. These businesses are located in Finland, Sweden, Denmark and Norway and currently employ approximately 900 employees.
Case published 18.7.2024
We assisted eQ Community Properties Fund in the sale of three healthcare and hospital properties to Niam. The properties have a total floor area of approximately 18,000 square meters. Two of the properties are located in Helsinki and one in Pori. Saukonpaadenranta 2 is a property in the maritime district of Jätkäsaari, with the private cancer hospital Docrates as its main tenant. Bulevardi 22 is a historical property where Mehiläinen, one of Finland’s largest private healthcare service providers, operates as the main tenant. The property in Pori, located in the heart of the city, has a lettable area of approximately 5,800 square metres and it is BREEAM Very Good certified. The property is fully leased to Terveystalo. 
Case published 5.7.2024
We advised funds managed by OP in a transaction whereby they sold two modern logistics properties to Logian. Logian is a joint venture between Keva and Mrec Investment Management Oy. The properties are located in Tuusula close to the Helsinki Airport, and their area is approximately 32,300 square metres in total. The properties hold the LEED Gold certificate with energy class A and feature solar panels that generate a significant share of the electricity used by the properties annually. 
Case published 3.7.2024