K66 – Vertical Gardens




S.T. Hammer d.o.o., Ljubljana


Ljubljana, Slovenia


Library, Housing, Concierge Housing, Clinic, Ambulant Hospital


70.000 sqm


Hosoya Schaefer Architects AG, Zürich


Invited competition

Landscape Architect:

Vogt Landschaftsarchitekten AG, Zurich


Joseph Schwartz, Dr. Schwartz Consulting AG, Zug

Strategy / Financial Planning:

Mountainworks, Den Haag Fakton, Rotterdam


Peter Mensinga, Arup, Amsterdam

Invited Competition, Ljubljana, Slovenia

K66 is the first new development project in the Smartinska Masterplan area. The plot is located at the western end of a centrally located park on a site that is currently used by a steel construction company.

This project rededicates this area incrementally. Existing buildings will be gradually converted and their uses transferred to new buildings in stages. As the final step, a 60-meter high-rise will be created. A total of around 70’000 square meters of floor space including housing, public and commercial uses, a library, and a medical center is planned.

At the northern end, the high-rise marks the entrance to the park. The facades accentuate the corner of the park and are activated on the lower two floors through public uses. In the west, a low row of houses leads to the single-family housing neighborhood Zelena Jama. Each residential façade receives a slightly differentiated, semi-public treatment that opens it towards the outside and thus articulates the facade. Corridors provide natural ventilation for the apartments.



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Zürich office

Flüelastrasse 10 8048 Zürich Switzerland (Google Maps)
T. +41 (0)43 243 6313 F. +41 (0)43 243 6315

Kyoto office

Jimukinoueda bldg. 602 21 Sakaimachi Gojo-Takakurakado Shimogyoku Kyoto Japan
T. +81 (0)75 744 1503