Kasarmikatu 21

Kasarmikatu 21, Helsinki

Smart elegance in the heart of the city

Kasarmikatu 21 is a rare new construction project in the old grid area of the center of Helsinki. Two office buildings with low floor heights, completed in the 1960s, were demolished from the construction site. The new building is planned for two plots and according to two valid site plans.

The building features seven above-ground floors and two underground levels. The first floor hosts a shared lobby area for occupants, a café, an event space, and a lunch restaurant, all extending into the light courtyard – the heart of the building. Along the street front, additional shops and restaurants are available.

The primary occupant of the building, law firm Roschier, benefits from a dedicated main entrance on the second floor, along with a lobby situated at the street corner. From the second to the seventh floor, the building offers flexible, premium office spaces featuring large windows and a glass wall that overlooks the courtyard. A spacious terrace on the sixth floor is linked to the main occupant’s staff break area. On the seventh floor, Roschier’s client conference center and restaurant boast a terrace equipped with a bar, offering views over Kasarmitori.

The building’s design has been thoughtfully integrated into the city’s surrounding environment. Its façades are made up of a light limestone-clad grid with expansive windows, one edge of which is punctuated by a beveled and patterned glass part. The differences in height of the construction site have been utilized by dividing the large building into two parts.

Ahlström Capital, HGR Property Partners and YIT Rakennus commissioned the project. The LEED Platinum certificate awarded building was completed in 2017 and its total area is 22 700 m². SARC is responsible for the main and architectural design of the project.


Client: Ahlström Capital, HGR Property Partners, YIT Rakennus

Building users: Roschier, Danske Bank and Sentica Partners among others

Location: Helsinki

Year: 2017

Size: 22 700 m²