A magnificent Art Nouveau stone castle designed by architect Lars Sonck in a prestigious area of central Helsinki. The stone castle was renovated for modern office use in 2011 in collaboration with the Helsinki City Museum. The building's stunning facade and historically significant staircase are now protected sites. Within the unique setting of the stone castle, 2,699 m² of modern and prestigious office space is available for rent, and the spaces can be adapted to the tenant's needs. The property is excellently located in Kaartinkaupunki. Its central location provides good public transport connections. All city center services are also within close proximity. Kaartinkaupunki is a charming mix of new and old. In the heart of Helsinki, yet in its own tranquility.

The property has been awarded a BREEAM In-Use Very Good environmental certificate. BREEAM (Building Research Establishment Environmental Assessment Method) is an international environmental classification system for buildings, aiming to reduce the environmental impact of building use and to develop healthier working environments.

Parking spaces in the courtyard and Q-park Kasarmitori and Erottaja The property has seven parking spaces in the courtyard. The Q-park Kasarmitori and Q-park Erottaja parking facilities are located very nearby.

The property does not have separate meeting or sauna facilities, but various sizes of meeting rooms can be rented from Tapahtumatalo Bank (Unioninkatu 20-22) at Sponda's own customer rate.