P1020. Conversion and extension of an apartment building. Küsnacht
Details
Focus: Conversion and extension of an upper floor and attic in Küsnacht into a modern family retreat.
Number: 1020.00
Discipline: Architecture, interior design
Typology: Residential
Service: 2 Preliminary study, 3 Project planning, 4 Tendering, 5 Realization
Year: 2017 - 2019
Costs: CHF 750,000.00
Location: Zürichstrasse 119d, 8700 Küsnacht
Photographer: Studio Gataric Fotografie
Press: The Swiss Homeowner March22
The project
On the top - Raumtakt created a cozy and modern home for a young family on Lake Zurich from an underused and therefore unoccupied attic.
The single-family house with two storeys and a flat roof was built in Küsnacht on Lake Zurich in the 1940s. Around 40 years later, it was finally converted into an apartment building: An upper floor and attic were added to the building, resulting in a gabled roof.
The house had been owned by the family since it was built. The owners, who occupy the two upper floors of the house, also commissioned Raumtakt with the conversion and renovation. The architecture firm Raumtakt was responsible for the overall renovation. During the preliminary project, it emerged that a building mass transfer was required for a further extension to the attic. The calculations for such a transfer are based on the volume permitted for building on a plot of land. This could be fulfilled by a surrounding building. This allowed interior designer Stefan Müller to create an additional living space in the attic that did not previously exist.
In the preliminary project, Stefan Müller worked with the clients to develop a forward-looking spatial program. The aim was to implement the family's vision on the two floors: A clear room structure that offered space for the two children, but also met the parents' needs for a place of retreat.
The clever room layout in the house also met the client's wish for a larger kitchen/living room. By moving a non-load-bearing wall in the kitchen area, the corridor was given a coherent shape. The old, small windows were replaced with floor-to-ceiling, inviting glass. They lend the light-flooded room more comfort and make the rooms appear more inviting. At the same time, this building measure has resulted in considerable energy savings.
The roof insulation of the house also turned out to be inadequate; the entire plumbing, heating and electrical installations proved to be in need of renovation. As the space in the attic was now used as a living area, it made sense to move the heating from the attic to the basement. A plant room was created there; the new pipework in all rooms was used to install underfloor heating.
In addition to the part used as a bedroom with dressing room, a new bathroom has now been added to the top floor. To give the family the privacy they need, Stefan Müller created a stylish glass partition wall with a contemporary industrial look. The glass partition wall with the handcrafted railing in the same black matt finish creates visual clarity and also serves as an eye-catcher in the house.
