Real estate company committed to sustainable growth, responsibility and continuous improvement.

Vacant Premises Contact us

Office premises in Helsinki down town area

Various and personal business premises, from old industrial properties to modern office buildings.

Customer relations

We promote long-term, close customer relationships, local presence and service that exceeds customer expectations. We offer existing and potential customers premises, meeting spaces and services that are best suited for their business objectives. Castellum will be recognized as an innovative player in selected product and customer segments by making clear investments in project development, technological development and sustainability that strengthens our business.



Castellum’s strategy is to be the most sustainable property company in Europe and a major player in the construction of a sustainable society. We see that sustainability should be integrated into business operations and yield tangible results. This work should characterize the entire business from ownership, property management and property portfolio development to customer relationships, employees and financing.

Our People

Castellum aims to be an attractive employer with committed, motivated employees and managers, all of whom work towards the same goal, thereby meeting high expectations. Castellum is building a goal-oriented organization in which its employees constantly challenge themselves and their colleagues to strengthen both the organization and individuals.