Office High-rise Andreasturm

The office high-rise Andreasturm is situated on a triangular plot of land that has become available between the spread of railway tracks at Oerlikon station. The pentagonal tower, the property of the Swiss Federal Railways, is 80 m high, with 22 above-ground and four below-ground storeys.

Precisely placed cantilevers on the 12th floor divide the building into a middle and a head section, making it look slender or flat from a distance, depending on one’s vantage point.

An expansive base anchors the structure in its surroundings and opens it up on three levels. The main entrance with public facilities and a small, new plaza face the traffic-calmed Andreasstrasse. The premises of anchor tenant Amstein + Walthert are accessed directly from the higher railroad platform while the delivery entrance is on the lower street to the rear.

A well-appointed, double-height lobby welcomes tenants and visitors, who reach the upper stories via the lift lobby. An open staircase leads up to the first floor and the main tenant‘s reception desk. The tenant’s public spaces are arranged around a central core: a “piano nobile” with conference rooms, a gallery and a staff restaurant in the protruding portion of the base.

The skeleton of the high-rise is reinforced concrete with a double-shell element façade. Flat slabs span up to 9.30 meters between the core and the prefabricated concrete supports along the façade. The column-free spaces allow for flexible layouts and workplaces with natural daylight. The double-shell façade consists of an inner layer with slender windows that can be individually opened, and exterior glazing with horizontal parapet bands, into which copper and gold coloured inlays have been laminated, their tone varying to match the angled surfaces of the façade. The appearance of the building changes depending on the weather and lighting: at times, the tower may look like a flat, reflecting surface; at others, one can see the filigree vertical structure of the interior.

Location Zurich-Oerlikon, Switzerland

Programme 26-storey office building (4 underground, 22 above ground), 1,200 workplaces, offices, conference area, restaurant, retail, underground parking
Tenants: engineering office, medical centre, start-ups, university institutes

Competition 2-phase, 2013, 1st Prize

Planning/Construction 2013–2018

Client SBB AG, Zurich
EBP Schweiz AG, Zurich

Gross Floor Area 35‘517 m2

Team G/G Planning/ Construction: Stefan Thommen (Team Manager), Matthias Clivio (Project Manager basic construction), Luisa Wittgen (Project Manager tenant fitout), Christoph Lay, Nicolas Hunkeler, Christian Gammeter
Competition: Stefan Thommen, Mathias Rösner, Rodrigo Jorge, Thomas Möckel, Leyla Ilman

Construction Management Ghisleni Planen und Bauen GmbH, Zurich (until Submission)

Total Contractor Implenia (from Submission)

General Contractor GGG Gigon Guyer Ghisleni Generalplaner Andreasturm AG (until Submission/ SIA Subphase 5)

Landscape Architecture Studio Vulkan, Zurich

Structural Engineer WaltGalmarini AG, Zurich

Electrical Engineer Amstein + Walthert AG, Zurich

Building Services Engineer Amstein + Walthert AG, Zurich

Building Physics Engineer BAKUS Bauphysik & Akustik, Zurich

MSR Amstein + Walthert AG, Zurich

Heating/Cooling Amstein + Walthert AG, Zurich

Ventilation Engineer Amstein + Walthert AG, Zurich

Acoustical Engineer BAKUS Bauphysik & Akustik, Zurich

Lighting Consultant Ernst Basler + Partner AG, Zurich
tenant fitout: A+W: Reflexion AG, Zurich

Facade Reba Fassadentechnik AG, Chur

Interior Design tenant fitout A+W: Annette Gigon / Mike Guyer Architekten, Zurich
Trix Wetter, Zurich

Signage Integral Ruedi Baur, Zurich

Sustainability «DGNB Platin»

Photos © Roman Keller

Würth Haus Rorschach

A greenish crystalline building responds to the unusual location of the site, set between the edge of Lake Constance and Churerstrasse. Walkers and passers-by experience a glass structure that oscillates between transparency and shiny reflective surfaces that multiply the natural beauty of the setting. The architecture affords views out to the surroundings, glimpses into the building, and sightlines through it to the park and lake.

The interior offers staff and visitors generously proportioned sequences of rooms - workspaces, communication areas, and leisure zones - as well as providing space for product presentations and art exhibitions. The structure responds to the train station building with lower volumes and reacts to the expanses of the park and lake with a higher segment. There are plans to add an extension on the eastern side in a future phase of construction. Toward the street, the volumes give shape to a range of external spaces through precisely defined projections and setbacks: in the middle is the entrance area, to the east the vehicle access and workshop zone, and to the west Bahnhofsplatz, the station square, which is expanded toward the lake. Maple trees set in a perpendicular configuration characterize this space, and also continue as rows along Churerstrasse.

Approaching from the station, a broad canopy signals the main entrance. The various user groups - visitors, people attending courses, and company staff - enter the building through a large lobby and are guided from this point to the different parts of the building. On the ground floor and first floor, the public functions - training and conference rooms, as well as the restaurant - are grouped around a foyer with an open courtyard in the center and are linked by a sweeping stairway. Both the conference area and the separate exhibition spaces can be accessed directly from the exterior, allowing the option of using these areas independently from the rest of the building. The exhibition area guides visitors from the entrance to two different-sized exhibition rooms, which are located on the first floor of the southern part of the building and are naturally lit from above. The structure of the shed skylight over the exhibition spaces simultaneously supports the enormous projecting canopy over the entrance. Office space extends over four stories in the highest part of the building, which is not open to the general public. Informal meeting areas with balconies facing the lake, transparent or closed-off meeting rooms, and individual offices alternate here with open-plan office areas.

A double glass envelope encases the building. The inner layer is made up of triple glazing and metal-clad thermal insulation. The external, back-ventilated layer is composed of offset greenish glass panes equipped with a fine mesh insert with a metallic luster. This creates a rhythmically articulated glass curtain that provides protection against wind from the lake and noise from the street and also against excessive heat and cold. The predominance of glass in the building materials is continued on the roof in the form of CIS photovoltaic panels.

Location Rorschach, Switzerland

Programme Administration Building with Training and Conference Centre, 630-seat auditorium, museum, restaurant, cafeteria, hardware-shop, workshops

Competition 2009, 1st Prize

Planning/Construction 2009–2013

Client Würth International AG, Chur
Owner's representative: Walter Dietsche Baumanagement AG, Chur

Gross Floor Area 32'200 m2

Team G/G Planning/Construction: Christian Maggioni (Team Manager), Matthias Clivio (Project Manager), Nicolai Rünzi, Christoph Lay, Katja Fröhlich, Rus Carnicero, Yvonne Grunwald, Martin Schneider, Michael Kloiber, Brigitte Rüdel, Franziska Bächer
Competition: Luisa Wittgen, Nicolai Rünzi, Bettina Gerhold, Thomas Möckel, Matthias Clivio

Construction Management Walter Dietsche Baumanagement AG, Chur

Landscape Architecture Atelier Girot, Gockhausen

Structural Engineer Dr. Lüchinger Meyer Bauingenieure AG, Zurich

Electrical Engineer Bühler + Scherler AG, St.Gallen

Building Services Engineer Waldhauser Haustechnik AG, Basel

Building Physics Engineer Kopitsis Bauphysik AG, Wohlen

Fire Engineer Makiol + Wiederkehr, Beinwil am See

MSR Boxler MSRL Engineering, Jona

Ventilation Engineer Waldhauser Haustechnik AG, Basel

Acoustical Engineer Müller-BBM GmbH, Planegg, Germany

Daylighting Consultant Institut für Tageslichttechnik Stuttgart, Germany

Lighting Consultant Licht Zentrale, Nürnberg, Germany

Plumbing Tomaschett + Cioce AG, Rorschach

Facade Reba Fassadentechnik AG, Chur

Signage Trix Wetter, Zurich

Colours (partial) Harald F. Müller, Oehningen, Germany

Photos © Thies Wachter
© Shinkenchiku-sha, Tokyo

Address Churerstrasse 10, CH – 9400 Rorschach

«Platform» Office Building

In the immediate vicinity of Hardbrücke railway station, the seven-story office building called Platform completes the ensemble comprising the high-rise Prime Tower and its annexes Cubus and Diagonal. The building’s volume, with various angles, reacts to the urban situation, providing a coherent link between the station and the new central square. A two-story-high passage through the building connects the square with the public pedestrian and bicycle path along the side of the tracks as well as with the new pedestrian underpass to Hardbrücke Station. In addition, the passage acts as a generous covered area outside the entrance foyer.

With its pronounced horizontal and layered design, the building contrasts with the Prime Tower nearby, effectively forming its reclining counterpart. As in the tower, the stories increase their floor area as the building rises, made possible by various projections. the volume of the building is also subdivided by courtyards that cut into the west and south sides and ensure well-lit office spaces within, as well as by the angular projections in the façade.

The central, prestigious entrance foyer forms an additional internal open area. A tall atrium flooded with natural light links the entrance level with the office floors above. Its function as a hub that lends the building its identity is additionally underlined by the open staircases and adjoining seating areas on the office floors. Dark glass balustrades mirror the space and the light in multifaceted reflections, creating a kaleidoscope effect.

Next to the entrance foyer on the ground floor are a restaurant, a cafeteria, and an auditorium. A wide, inviting staircase leads from the entrance level to the customer lobby on the first floor, from which the various conference rooms can be accessed. the levels above provide office space for around 1,000 staff. Although the building has been conceived as a corporate headquarters, the positioning of core facility areas permits a variety of office typologies if required in the future, including the division of each floor into a maximum of four separate rental units. Wall and ceiling paintings by Nic Hess, wallpaper and drapes by Lachmayer/Nobis and a textile sculpture by Ernesto Neto complete the interior.

To be able to meet changing spatial needs or different uses without radical structural alterations, the building has been designed as a load-bearing skeleton structure with reinforced cores.

The glazed façade is articulated by horizontally layered bands of parapets and windows. The double windows hold sunblinds in between and help reduce noise from outside. The inner windows can be opened for ventilation purposes toward the interim space of the double-skin façade. The slightly reflective outer glazing shell and parapets accentuate the building’s folded structure.

Location Zurich, Switzerland

Programme Seven storeys office building, 1'000 workplaces, atrium as central entrance hall, restaurants, shops, auditorium

Commission 2007

Planning/Construction 2007–2011

Client Swiss Prime Site AG, Olten

Gross Floor Area 28‘853 m2

Team G/G Christian Maggioni (Team Manager), Franziska Bächer (Project Manager from 11/ 2007), Stefan Thommen (Project Manager until 06/ 2007), Christoph Rothenhöfer (Project Manager until 05/ 2007), Markus von Dellingshausen, Philippe Volpe, Karla Pilz, Armin Baumann, Pieter Rabijns

Total Contractor HRS Real Estate AG, Zurich

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Structural Engineer Planning: ARGE Dr. Schwartz Consulting AG, Zug and Dr. Lüchinger + Meyer Bauingenieure AG, Zurich and Freihofer & Partner AG, Zurich
Construction: Ribi + Blum AG, Romanshorn

Electrical Engineer Planning: IBG B. Graf Engineering AG, St.Gallen
Construction: Herzog Kull Group Zürich, Schlieren

Building Physics Engineer BAKUS GmbH, Zurich

Heating/Cooling Planning: PB Peter Berchtold, Ingenieurbüro für Energie und Haustechnik, Sarnen
Construction: Lippuner Energie- und Metallbautechnik AG, Grabs

Ventilation Engineer Waldhauser AG, Münchenstein

Lighting Consultant Planning: Ernst Basler + Partner, Zurich
Construction: Regent, Zurich

Plumbing Planning: PB Peter Berchtold, Ingenieurbüro für Energie und Haustechnik, Sarnen
Construction: Huustechnik Rechberger AG, Zurich

Facade Planning: gkp fassadentechnik ag, Aadorf
Construction: Fahrni Fassadensysteme AG, Lyss

Furnishings Gigon / Guyer Architekten, Zurich
workspaces intern: Off Consult, Zurich

Art within Architecture Nic Hess, Zurich
Herbert Lachmayer and Margit Nobis, Vienna, Austria
Ernesto Neto, Brazil

Photos © René Dürr
© Walter Mair
© Shinkenchiku-sha, Tokyo
© Thies Wachter
© USM Möbelbausysteme / Dani Suter

Refurbishment of Former Diagonal Industrial Building, Maag-Areal

The Diagonal building, the former Maag cogwheel factory, has been preserved as a fascinating architectural testament to the site’s industrial past. The load-bearing structure and the façades have been carefully revitalized. the surviving slender glazing bars were restored and are complemented by insulating glazing on the interior. The Diagonal building contains a restaurant on the ground floor and gallery spaces on the upper floors.

Location Zurich, Switzerland

Programme Listed industrial building, with restaurant in the ground floor, art galleries, offices

Competition 2004, 1st Prize

Client Swiss Prime Site AG, Olten
Client’s Representative: Perolini Baumanagement AG, Zurich

Gross Floor Area 2‘759 m2

Team G/G Planning/Construction: Stefan Thommen (Team- and Project Manager) Pieter Rabijns (Project Manager), Alex Zeller, Urs Meyer, Raffaella Bisceglia
Competition: Stefan Thommen

Total Contractor ARGE Prime Tower
Losinger Construction AG and Karl Steiner, Zurich

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Cost Planning/Scheduling Building Project/General Contractor Submission: b+p baurealisation ag, Zurich

Structural Engineer Competition (C): Dr. Schwartz Consulting AG, Zug
Submission (S): Dr. Schwartz Consulting AG, Zug and Dr. Lüchinger + Meyer AG, Zurich and Freihofer & Partner AG, Zurich
Execution (E): Walt + Galmarini AG, Zurich with Dr. Schwartz Consulting AG, Zug, Dr. Lüchinger + Meyer AG, Zurich, Bänzinger Partner AG, Richterswil, Freihofer & Partner AG, Zurich

Electrical Engineer S: IBG Graf AG, St.Gallen
E: Hefti Hess Martingnoni, Zurich

Fire Engineer S: Makiol + Wiederkehr, Beinwil am See
E: Gruner AG, Basel with Makiol + Wiederkehr, Beinwil am See

Heating/Cooling S/E: PB P. Berchtold, Sarnen

Ventilation Engineer C/S: Waldhauser AG, Münchenstein
A: Hans Abicht AG, Zurich

Plumbing S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Sprinkler Consultant S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Photos © Valentin Jeck
© Walter Mair
© Thies Wachter

Award Auszeichnung für gute Bauten der Stadt Zürich 2011–2015

Cubus Office Building, Maag-Areal

The Cubus annex building, a seven-story structure with a pentagonal ground plan, houses offices on the upper floors and at ground level retail outlets, access to the parking garage, and deliveries for the entire complex. Of note here is that, due to the excellent public transport connections to this site, relatively few parking spaces are required. The load-bearing structure is executed in white-pigmented exposed concrete. Externally fixed glazing panels give the façade its character and help to reduce noise from the elevated road nearby.

Location Zürich, Switzerland

Programme Office building with 7 floors, ground floor with delivery and parking access for the Prime Tower and its annex buildings, retail, offices, upper floors concerning the load capacity are constructed for archive use

Competition 2004, 1st Prize

Client Swiss Prime Site AG, Olten
Client’s Representative: Perolini Baumanagement AG, Zurich

Gross Floor Area 6‘206 m2

Team G/G Stefan Thommen (Team and Project Manager), Pieter Rabijns (Project Manager), Alex Zeller, Urs Meyer, Raffaella Bisceglia
Competition: Stefan Thommen

Total Contractor ARGE Prime Tower
Losinger Construction AG and Karl Steiner, Zurich

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Cost Planning/Scheduling Building Project/General Contractor Submission: b+p baurealisation ag, Zurich

Structural Engineer Competition (C): Dr. Schwartz Consulting AG, Zug
Submission (S): Dr. Schwartz Consulting AG, Zug and Dr. Lüchinger + Meyer AG, Zurich and Freihofer & Partner AG, Zurich
Execution (E): Walt + Galmarini AG, Zurich with Dr. Schwartz Consulting AG, Zug, Dr. Lüchinger + Meyer AG, Zurich, Bänzinger Partner AG, Richterswil, Freihofer & Partner AG, Zurich

Electrical Engineer S: IBG Graf AG, St.Gallen
E: Hefti Hess Martingnoni, Zurich

Heating/Cooling S/E: PB P. Berchtold, Sarnen

Ventilation Engineer C/S: Waldhauser AG, Münchenstein
E: Hans Abicht AG, Zurich

Plumbing S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Sprinkler Consultant S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Facade C/S: gkp fassadentechnik ag, Aadorf
E: Reba Fassadentechnik AG, Chur

Photos © Walter Mair
© Thies Wachter

Prime Tower Office High-rise
with Annex Buildings Cubus and Diagonal, Maag-Areal

The location of the Prime Tower and its two annexes, the Cubus and Diagonal buildings, is part of a formerly almost inaccessible industrial site that is gradually being converted into a business and residential district with associated services. Situated in the immediate vicinity of Hardbrücke railway station and 126 meters in height, the high-rise is the tallest in Switzerland for the time being. It is not only a distinctive feature of the neighborhood, but also a landmark for the up-andcoming district of Zurich West.

The concept underpinning the Prime Tower is of a building that might be said to assume many guises, although its fundamental structure and the means deployed are relatively straightforward. The design aimed to find a floor plan arrangement that would maximize the number of well-lit workplaces, while also seeking to create a striking architectural form evoking differing impressions depending on the position from which it is viewed. The outcome of these efforts is a building on an irregular octagonal ground plan that confounds conventional expectations by broadening toward the top.

In terms of urban planning, the building’s significance is twofold in relation to its impact when seen from nearby or from a distance. From afar, it appears as an abstract, elegant volume formed from greenish glass that changes depending on whether it is seen from the side (from the north or south) or head-on (from the east or west). The planes of the façade, oriented in various directions, reflect the light and the surroundings in different ways, articulating and subdividing the volume into what might be called gigantic “pixel surfaces”. The impression the building makes when seen close-up also changes with the spectator’s standpoint. These close-up views reveal that the projecting portions of the tower exert an integrating effect on the surrounding buildings.

At Geroldstrasse, an inviting outdoor area between the high-rise and the new neighboring Cubus office building leads to the entrance of the Prime Tower and toward the planned Lichtstrasse. In the southwest, a plaza is created in conjunction with the existing listed Diagonal building and the new Platform office building beside the railway.

The ground floor of the Prime Tower houses retail spaces and a coffee bar for use by both office employees and passers-by. Special features on the top floor include a public restaurant, bistro with a bar, and a lounge, while a private conference area is available on the floor below.

The cores and emergency stairs are arranged so that up to four tenants can occupy offices on the same floor or, conversely, one business can occupy several floors with internal atriums and staircases. The projecting portions of the building create additional office space on the higher and therefore more soughtafter floors, as well as providing greater variety when using the space for different types of offices.

The load-bearing skeleton structure of the tower is made of concrete with reinforcing cores. The variously sized cantilevered projections are supported by slanting the supporting columns over two or three stories. The façade is constructed from insulated triple glazing with a greenish tint. To enhance workspace conditions, and to meet fire regulations, which require smoke ventilation, alternating windows can be opened parallel to the building. The prefabricated windows are frameless on the exterior. They grant the polygonal building the multifaceted appearance of a greenish crystal.

Location Zurich, Switzerland

Programme High-rise office building, 36 floors, 126 m hight, entrance hall, bank branch, varying office types, gastronomy, restaurant and conference area on the top floors

Competition 2004, 1st Prize

Planning/Construction 2004–2011

Client Swiss Prime Site AG, Olten
Client’s Representative: Perolini Baumanagement AG, Zurich

Gross Floor Area Total Prime Tower with Annex buildings: 73‘830 m2
Prime Tower: 53‘461 m2

Team G/G Planning/Construction: Stefan Thommen (Team Manager), Christian Maggioni (Deputy Team Manager), Christoph Rothenhöfer (Project Manager until 2007), Pieter Rabijns (Project Manager from 2007), Alex Zeller, Urs Meyer, Franziska Bächer, Raffaella Bisceglia, Armin Baumann, Karin Winklmann, Roberto Outumuro, Rafael Schmid, Martin Bischofberger, Leander Morf
Competition: Stefan Thommen

Total Contractor ARGE Prime Tower
Losinger Construction AG and Karl Steiner, Zurich

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Cost Planning/Scheduling Building Project/General Contractor Submission: b+p baurealisation ag, Zurich

Structural Engineer Competition (C): Dr. Schwartz Consulting AG, Zug
Submission (S): Dr. Schwartz Consulting AG, Zug and Dr. Lüchinger + Meyer AG, Zurich and Freihofer & Partner AG, Zurich
Execution (E): Walt + Galmarini AG, Zurich with Dr. Schwartz Consulting AG, Zug, Dr. Lüchinger + Meyer AG, Zurich, Bänzinger Partner AG, Richterswil, Freihofer & Partner AG, Zurich

Electrical Engineer S: IBG Graf AG, St.Gallen
A: Hefti Hess Martingnoni, Zürich

Heating/Cooling S/E: PB P. Berchtold, Sarnen

Ventilation Engineer C/S: Waldhauser AG, Münchenstein
E: Hans Abicht AG, Zurich

Plumbing S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Sprinkler Consultant S: PB P. Berchtold, Sarnen
E: GRP Ingenieure, Rotkreuz

Facade C/S: gkp fassadentechnik ag, Aadorf
E: Reba Fassadentechnik AG, Chur

Furnishings Gigon / Guyer Architects with C/S: Studio Hannes Wettstein, Zurich

Art within Architecture Adrian Schiess, Zurich and Mouans-Sartoux, France
Harald F. Müller, Öhningen, Germany

Photos © Walter Mair
© Thies Wachter

Award Auszeichnung für gute Bauten der Stadt Zürich 2011–2015

Rosau Office Building

The new L-shaped office building opposite the Tonhalle on the corner of Gotthardstrasse and Claridenstrasse is integrated into the perimeter block structure along Claridenstrasse, while Villa Rosau and its surrounding gardens remain true to their historical conception. The green area forms a twin garden with the park of the Hotel Baur au Lac on the opposite side of the Schanzengraben canal. The newbuild marks the westerly end of the two gardens, whose beautiful trees border the public square Bürkliplatz.

The parks of Villa Rosau and Hotel Baur au Lac on Lake Zurich are important witnesses to the history of the city’s development. The gardens flow around the villa and the new building, merging the perimeter block development with the solitary villa in the park to form a coherent ensemble. This convergence of architectural and organic garden design is a central theme, which assists the organization of the green space into different zones.

The new building offers the future long-term tenant, a banking firm, a prestigious place of business. Customers are received in an entrance hall situated in the part of the building facing the lake, from where they are accompanied to a lounge on the fourth floor, where several consultation rooms are at their disposal. An open staircase leads to the customer area on the third floor, with larger consultation rooms and conference rooms with vistas across the lake. Adjacent to the entrance hall on the ground floor is the bank’s seminar area, with an auditorium that seats 120 guests. At the corner of Gotthardstrasse and Claridenstrasse, a bakery with outdoor seating is planned, while two apartments are housed in the top two levels of the building section facing the Schanzengraben canal.

The structure is a skeleton frame with recessed columns and centrally located reinforcing concrete circulation cores. Vertical and horizontal profiles of architectural bronze arranged in varying rhythms articulate the façade. They take up, on a larger scale and with greater geometric regularity, the existing ornamental wrought-iron fences surrounding the gardens.

Location Zurich, Switzerland

Programme Office building with 420 workingplaces, staff restaurant, meeting rooms, gastronomie, two apartments, underground parking

Commission 2008

Planning/Construction 2008–2020

Client Client basic fitout: Villa Rosau AG, Zurich
Client’s representative: Conarenco AG, Zurich
Client tenant fitout: SCOR Services Switzerland AG, Zurich

Gross Floor Area 17‘810 m2

Team G/G Planning/Construction Office Building 2010–2020:
Christian Maggioni (Team Manager from 11/2012), Mathias Rösner (Project Manager from 2011), Michael Winklmann (Team Manager until 10/2012), Martin Bischofberger (Project Manager until 2010), Marco Cristuzzi, Franzis Gericks, Lilla Kis, Lisa Menje, Roman Vetterli, Rodrigo Jorge, Christoph Lay, Milica Brockmann, Christoph Dober, Brigitte Rüdel, Griet Aesaert
Planning Residential/Office Buiding 2008–2009:
Michael Winklmann (Team Manager), Christoph Justies (Project Manager), Mark Zjörjen, Christoph Dober, Cornelia Schmidt, Karin Schultze

Construction Management b+p baurealisation ag, Zurich

Landscape Architecture Vogt Landschaftsarchitekten, Zurich

Structural Engineer Locher Bauingenieure AG, Zurich

Electrical Engineer IGB B. Graf AG, St.Gallen

Building Services Engineer Gruenberg + Partner AG, Zurich

Building Physics Engineer Kopitsis Bauphysik AG, Wohlen

Fire Engineer Makiol+Wiederkehr, Beinwil am See

Facade gkp fassadentechnik ag, Aadorf

Photos © Roman Keller

Address Glärnischstrasse / Claridenstrasse, CH – 8002 Zurich

Office Building Lagerstrasse House, Europaallee 21

In the immediate vicinity of Zurich’s Main Station, the formerly almost inaccessible infrastructure areas used by the Swiss Post and Swiss Railways are undergoing a decisive transformation. They are becoming part of the urban fabric, with public streets, squares, and courtyards. Four buildings are now arranged to form a perimeter block development between the new Europaallee and Lagerstrasse, surrounding a rectangular public courtyard easily accessible from all four sides.

A special characteristic of this complex is that the buildings were designed by different architects and therefore each has a distinct appearance and interior. Two were conceived by Max Dudler Architects (Buildings Europaallee and Eisgasse), one by David Chipperfield Architects (Freischützgasse Building), and the fourth by Gigon / Guyer Architects (Lagerstrasse Building). What is interesting from a volumetric and urban planning standpoint is the way the four buildings relate to the neighboring structures. Three bridges reach from one volume to the next and therefore allow circuits and connections on all the upper levels, while at the same time creating engaging entry passages.

Building Lagerstrasse possesses a multifaceted volume that reacts to the various urban planning requirements, building regulations, and functional specifications and derives from them an unexpected articulation. Located on Lagerstrasse, it is set back from the building line on the first two levels, forming a covered entrance area as well as a welcoming gesture. Recesses and projections on the upper levels modulate the volume, forming the attic story and bridge connections, as well as enlarging the office space.

A cafe, retail space, and a generous entrance hall are located on the ground floor. This lobby can be accessed from the street as well as from the courtyard. It provides the main entrance to the office and conference rooms on the seven upper floors. A further access option is offered by a passageway encircling the courtyard on the first floor, which connects the four buildings.

Wide-spanning concrete floors, a minimum of columns, as well as the staircase and elevator cores constitute the load-bearing structure of the building. Concrete was used in refined forms - as terrazzo and cast stone - for the flooring on the ground floor and in the staircases.

The double-layered building skin consists of an inner metal and glass façade with a varied rhythm of glass pane sizes and an outer, ventilated layer of single glazing with metallically shimmering fabric inserts. The outer panes provide noise protection from the street, wind protection for the sunshades and also afford privacy to those inside, without compromising the views from inside the offices. The outer glass panes are arranged at varying angles to each other, generating additional slits for ventilation and, depending on the lighting conditions, a subtle play of different reflections. This lends the impression of a curtain-wall façade - in the truest sense of the word.

Location Zurich, Switzerland

Programme Office buildings containing 2 000 workplaces, Block perimeter building subdivided into four volumes, with public courtyard accessible from four sides, entrance halls, retail and gastronomy use, office space on seven floors, all buildings are interconnected on the upper floors via bridges, with a corridor at first floor level allowing unhindered circulation throughout all four buildings.
Lagerstrasse House: 575 workplaces ground floor with entrance hall, retail space, café

Competition 2006, 2nd Prize: consortium Gigon/Guyer Architects and David Chipperfield Architects, Berlin

Planning/Construction 2007–2013

Client UBS AG, Zurich
Owners Representative: Beta Projekt Management AG, Zurich

Gross Floor Area House Lagerstrasse: 13‘680 m2

Competition Organzier Project Development: Schweizerische Bundesbahnen SBB, Bern
and Die Schweizerische Post, Bern

Team G/G Barbara Schlauri (Team Manager), Urs Meyer (Project Manager from 08/2010), Brigitte Rüdel (Project Manager until 08/2010), Luisa Wittgen, Katharina Löble, Bettina Gerhold, Ingo Brinkmann

Total Contractor Implenia Schweiz AG, Dietlikon

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Cost Planning/Scheduling Freiraum Baumanagement, Zurich (until TU-Submission)

Structural Engineer Leonhardt, Andrä und Partner, Berlin, Germany
and Dr. J. Grob & Partner AG, Winterthur

Electrical Engineer Bürgin & Keller Management & Engineering AG, Adliswil
and Thomas Lüem Partner AG, Baar

Building Services Engineer Polke, Ziege, von Moos AG, Zurich

Building Physics Engineer Kopitsis Bauphysik AG, Wohlen

Fire Engineer Gruner AG Ingenieure und Planer, Zurich

Acoustical Engineer Kopitsis Bauphysik AG, Wohlen

Lighting Consultant Matí AG Lichtgestaltung, Adliswil

Facade Planning: gkp fassadentechnik ag, Aadorf
Construction: Gig Fassaden GmbH, Attnang-Puchheim, Austria

Door Consultant Amstein + Walthert AG, Zurich

Safety Consultant Amstein + Walthert AG, Zurich

Photos © Stefan Müller

Address Lagerstrasse 20 CH - 8004 Zurich

Office Building Claridenstrasse 35

The new office building of the Balzan Foundation is located in central Zurich, close to Paradeplatz. Like the previous office building from the 1960s, it stands alone, but it is integrated into the existing perimeter block through its placement and size. The façade, articulated by horizontal elements of artificial stone and vertical metal profiles, echoes the inner load-bearing structure of concrete floor slabs and steel composite columns. The publicly accessible ground floor as well as the fourth and the top floor are accentuated by an expanded grid within the façade composition. Visitors are welcomed by a two-storey entrance hall facing the city. In memory of the institution’s founder, terrazzo flooring and sumptuous light fixtures lend the spacious entry Italian «grandezza».

The interior fit-out of the premises for the tenant, an audit and consulting firm, was conceived and created in tandem with the core and shell construction. The layout of the partitions, built-in furnishings and the custom-designed LED lighting are thus an integral part of the architecture.

The structural and energy concept of the building was optimized in order to add another storey within the specified building height, but without sacrificing room height. The loadbearing and bracing core, moderate spans and distances between columns ensure slender ceilings despite the strips of sound-absorbing elements and the pipes of the thermo active component system which are invisibly embedded in them. Ventilation with decentralised façade units and central extraction allows raised floors with minimal thickness. For heating and cooling, the compact building volume is connected to an anergy grid fed with lake water. A photovoltaic system is installed on the roof.

On the outside, the polished concrete of the prefabricated façade elements covering the edges of the floor slabs refers to the terrazzo surfaces of the interior, whereas the vertical profiles of anodized aluminium conceal both the loadbearing columns and the slender, individually operable ventilation flaps. The profiles are rectangular or round, closed or perforated, so that they can be read as both columns and «fresh air ducts».

A spacious forecourt along the street takes the place of the former parking lots. Broken stone slabs with greened gravel joints along with trees and shrubs recall the front yards once common in the erstwhile residential neighbourhood.

Location Zurich, Switzerland

Programme Office building, 7 floors above ground, 2 basement floors of the existing building, two-storey entrance hall, offices, meeting rooms, boardroom, 2 terraces, common room, underground parking with car lift

Competition 2015

Planning/Construction 2015–2018

Client Internationale Balzan Stiftung-Fonds

Gross Floor Area 4‘062 m2

Team G/G Planning/Execution: Stefan Thommen (Team Manager), Christoph Lay (Project Manager), Cornelia Schmidt (Project Manager tenant fit-out), Lukas Taller, Franziska Bächer
Wettbewerb: Stefan Thommen, Daniela Schadegg, Ivana Beljan

Construction Management Ghisleni Partner AG, Rapperswil/ Zurich

Landscape Architecture Schmid Landschaftsarchitekten GmbH, Zurich

Cost Planning/Scheduling Ghisleni Partner AG, Rapperswil/ Zurich

Structural Engineer Dr. Lüchinger + Meyer Bauingenieure AG, Zurich

Electrical Engineer Amstein+Walthert AG, Zurich

Building Physics Engineer BAKUS Bauphysik & Akustik GmbH, Zurich

MSR Amstein+Walthert AG, Zurich

Heating/Cooling Amstein+Walthert AG, Zurich

Ventilation Engineer Amstein+Walthert AG, Zurich

Acoustical Engineer BAKUS Bauphysik & Akustik GmbH, Zurich

Facade gkp fassadentechnik ag, Aadorf

Traffic Engineer Enz Partner GmbH, Zürich

Photos © Roman Keller

Löwenbräu-Areal – Arts Centre, Residential Tower and Office Building

The history of the Löwenbräu complex, a former brewery, is one of frequent remodeling, adding on, and replacing parts of the existing buildings, whereby the change of use from a brewery to an art exhibition and gallery complex in the 1990s marked the crucial turning point. The new project is based on this most recent, successful conversion, while enhancing the variety of uses for this complex with new residential, office, and exhibition spaces. The preservation of the original historical building is an important step toward maintaining the identity of the former industrial district, rendering an important chapter in the city’s history visible.

The concept for urban development here focuses on three structural changes in the form of new buildings within the existing complex: the New West Building, to offer additional space for the arts, the New East Office Building, and the Central High-Rise Residential Building. Together with the steel tower and the Swiss Mill silos, the high-rise residential building redefines the site’s silhouette and—to a certain extent—even that of the city.
By adding buildings to the existing complex, a new urban ensemble can evolve—with the Central High-Rise Residential Building forming the focal point. The elongated, older structures with the former main brewery building on Limmatstrasse are framed by the addition of a further level on top of the Arts Center in the west and by the taller New East Office Building at the opposite end near the railway viaduct.
The new Löwenbräu complex is now to be seen not just from the street and from a distance, but also from its two courtyards. The former Brewer’s Yard - a listed historical site - provides access to the surrounding buildings as well as being a traffic-free outside space for relaxation. The new entrance to the art institutions is located in the open Art Courtyard, which also includes parking spaces for visitors and a delivery entrance.
Together with the entrance area to the art section and the additional story at this end of the complex, the New West Building projects at right angles and adjoins the former workshops on the courtyard side. It includes art exhibition rooms, guest accommodations, and offices. The exhibition spaces and a multi-function room can be partitioned as required. They are lit by side windows and are accessed directly from the entrance area to the art section. This entrance area has been conceived as a new, generously proportioned foyer with a staircase and elevators. The staircase is directly accessible from the lobby, which can be entered from Limmatstrasse or the courtyard.
The Central High-Rise Residential Building, with its large projection to the south, houses 37 apartments, one to four on each floor, which all face in several directions, affording views of the city, the lake, and the Limmat valley. The main volume of the high-rise is cantilevered out over a narrower base set in the Brewer’s Yard. The 21 apartments in the base face southward onto the quiet courtyard. Service facilities are housed on the ground floor, in addition to a passageway between the two courtyards and the lobbies.
The New East Office Building is also an angled structure with a higher section on Limmatstrasse and a lower segment between Dammweg and the Brewer’s Yard. On the ground floor, the entrance lobby to the offices is located under the projection, whereas the gallery and retail spaces are accessed via the courtyard. The varied widths of the rooms on the upper office floors enable them to be adapted to suit a range of different office constellations. The façades of the Central High-Rise Residential Building and the New East Office Building are clad in molded ceramic elements with black and red glazed finishes that refer to the colored brickwork of the existing buildings. Double aluminum windows with additional ventilation slits consist of an external pane of plain glass and an inner pane of insulation glass with blinds in between. Turn-and-tilt-lift windows, custom-designed for the tower, can slide all the way up to the ceiling to invite the outdoors inside on a sunny day.
The tower rises up above the row of various old and new buildings along Limmatstrasse as a dark, shimmering volume. The walls form grid patterns whose ceramic surfaces stand out from or merge with the window areas depending on the light, presenting a changing face to the city.
The red New East Office Building picks up on the fundamental character of the old buildings not only with regard to the materials used, but also in its coloration. The wavy structure, the gleaming materials, and the alignment of the windows, however, anchor the building firmly in the present.
The New West Building has been designed as a homogeneous, white concrete structure, insulated on the inside. The art spaces are equipped with box windows. While the new and old sections of this building are interwoven closely here in terms of their volumes and use, the material finish chosen for the addition sets it apart from the existing structure. A new ensemble is created that enables the expansive dimensions of the new volume to be clearly read and signals the presence of the arts within the complex.

Location Zurich, Switzerland

Programme Conversion and extension of a former, partly listed brewery; museums, galleries, event hall, studios, shop areas, 58 apartments 2.5–5.5 rooms (21 courtyard apartments, 37 tower apartments), new office building, storage areas, underground parking

Competition 2003, two ex aequo 1st Prizes: Gigon/Guyer and Atelier WW Architekten

Planning/Construction 2005–2014

Client PSP Properties AG

Gross Floor Area 48‘328 m2

Team G/G Collaborators Competition:
Gigon/Guyer: Volker Mencke
Atelier WW: Martin Danz
Planning/Execution:
Mitarbeit Gigon/Guyer:
Volker Mencke (Planning-/ Team Manager), Bettina Gerhold, Daniel Friedmann, Reto Killer, Kathrin Sindelar, Damien Andenmatten, Yvonne Grunwald, Alex Zeller, Pieter Rabijns

Total Contractor Steiner AG, Zurich

Landscape Architecture Schweingruber Zulauf Landschaftsarchitekten, Zurich

Structural Engineer Consortium Dr. Lüchinger + Meyer Bauingenieure AG, Zurich Henauer Gugler AG, Zurich

Electrical Engineer Planning/Submission: Schneider Engineering + Partner Zürich AG, Zurich
Execution: Mosimann & Partner, Zurich; Schmidiger + Rosasco, Zurich

Building Services Engineer Gruenberg + Partner AG, Zurich

Building Physics Engineer braune roth ag, Binz

Fire Engineer Makiol + Wiederkehr Dipl. Holzbau-Ingenieure HTL/SISH Beinwil am See

Facade Planning/Submission: gkp fassadentechnik ag, Aadorf
Execution: Josef Gartner GmbH, Gundelfingen

Signage Integral Ruedi Baur, Zurich
Remodeling Entrance: Teo Schifferli, Zurich
Signito, Zurich

Colours Harald F. Müller, Öhningen, Germany

Photos Löwenbräukunst, Remodeling Entrance: © Roman Keller
© Thies Wachter
© Shinkenchiku-sha, Tokyo
Kunsthalle Zürich exhibitions: © Stefan Altenburger Photography
Luma Westbau Schwarzescafé: with kind permission Luma Westbau | Luma Stiftung © Stefan Altenburger
Courtyard apartment: © Laura Egger
© Christian Scholz
Construction site: © Thomas Zwyssig

Arts Centre

Residential high-rise

Brewery Main Building

New Office Building East

History