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House «Crocodile» - Lokstadt, Winterthur



Where locomotives and machines used to be built, a new district is now being developed. An urban living and working space for more than1'500 people is being created right next to the railway station. Timbatec is responsible for the wood engineering for the first building of the new district.

Visualization courtyard zoom
Visualization courtyard
Visualization facade view zoom
Visualization facade view
Building Information Model of the Wood Construction zoom
Building Information Model of the Wood Construction
Interior view of flat zoom
Interior view of flat

The Project

Once the Lokstadt area was the most important production plant in Switzerland for new locomotives and trains. Between 2018 and 2025, a new urban district will be built on this area according to the requirements of the 2000-Watt-Society.    

The area consists of both, valuable monumentsprotected industrial halls and modern new buildings. The refurbishments and conversions require great respect for the existing buildings, as well as technologically innovative solutions. When it comes to new construction projects, great importance is attached to sustainable building materials. For example, most new buildings are being constructed using timber. The «Crocodile» house is the first new building on the site and comprises 254 apartments in various forms.

The Construction

The perimeter block building with an inner courtyard of 

2000 m2 is constructed as a skeleton structure. The wooden columns become a formative part of the architecture. The visible wooden structure gives a clear structure to the living spaces and creates a natural feeling of space. In the "crocodile" only the basements and the staircases are made of reinforced concrete, the rest of the building is made of wooden elements.

The Challenges

The "crocodile" is planned continuously according to the methods of Building Information Modeling (BIM). The coordination of the interfaces and the cooperation between the different participants is a big and exciting challenge, which we are happy to face.

Construction Data

- 248 apartments  

- 5'500 m³ CLT panels 

- 1'500 m³ glued laminated timber  

- 700 m³ Frame wood 

- Outside wall 320mm. Rear-ventilated and internal installation facing shell. 

- CLT ceilings 220 mm with a 100 mm chippings fill, 19 meter span 

Services Timbatec

- Statics  

- Site inspections  

- Fire protection incl. quality assurance QSS 2  

- BIM Planning of supporting structure


Building Owner
Pensimo Management AG, Stiftung Adimora
gaiwo Genossenschaft für Alters- und Invalidenwohnungen
Gesewo Genossenschaft für selbstverwaltetes Wohnen

Timber Construction Engineers
Timbatec Holzbauingenieure Schweiz AG

General Contractor
Implenia, Zürich


  • Erstes Kapitel Lokstadt: Kantiges Krokodil aus Holz

    First chapter Lokstadt: angular crocodile made of wood

    Konstruktiver Ingenieurbau, Issue No. 04/2022 – Where locomotives and machines used to be built in Winterthur, a new district is being created: Lokstadt. The first building is called «Crocodile» and is one of the largest wooden buildings in Switzerland. The timber frame building was planned with BIM from the very beginning. But that's not the only thing that makes the mega residential building a pilot project. (Report in German)

  • Anerkennung für die WTK Rynetel und das Krokodil

    Recognition for WTK Rynetel and the "Krokodil"

    Themenheft von Hochparterre, Issue Oktober 2021 – We are particularly pleased about the recognition for the Rynetel Wildlife Bridge and "Krokodil" projects. As timber engineers, we were able to play a decisive role in shaping these projects. (Report in German)

  • Erstes Kapitel Lokstadt

    First chapter Lokstadt

    Mikado, Issue 07.2021 – A new district is being built in Winterthur: Lokstadt. The first building is called the «Krokodil» and is one of the largest wooden buildings in Switzerland. (Report in German)

  • Holzbau «Krokodil» erinnert an vormalige Nutzung der «Lokstadt»

    Wooden building «Krocodil» reminds of former use of «Lokstadt»

    Holz-Zentralblatt, Issue No. 25 – Winterthur is home to a giant «Krokodil». It is a structure on the site of Winterthur's «Lokstadt» and bears its name in memory of the SBB locomotives that were built here until 2010. Traces of the former industrial use are present, but the new one presents itself confidently and with a supporting structure made of wood that is barely visible from the outside. (Report in German)

  • Holztakt und Industriemelodie

    Wooden beat and industrial melody

    Hochparterre, Issue No. 5/21 – The residential development «Krokodil» densifies the Sulzer site in Winterthur with industrial references. Wood provides the structure, but remains in the background. (Report in German)

  • Ist Holzbau wirklich teurer als Massivbau?

    Is timber construction really more expensive than solid construction?

    Hauseigentümer, Issue No. 4/2021 - How does large-scale timber construction compare economically with solid construction? The consulting firm Wüest Partner AG has evaluated eight major new timber construction projects in recent years and concluded that the construction costs of the timber buildings studied are comparable to those of high-quality solid buildings. (Report in German)

  • Keine Angst vor Riesenblöcken

    No fear of giant apartment blocks

    NZZ, Issue No. 286/2020 - The "Krokodil" residential development on the Sulzer site in Winterthur sets new standards for timber construction. Read more about the 6- to 8-story wooden building with 254 apartments in today's edition of the NZZ. (Report in german)

  • Haus „Krokodil“ in der Lokstadt, Winterthur

    House Crocodile - Lokstadt, Winterthur

    Espazium, Stadt aus Holz, Issue No. 6/2020 - Where locomotives and machines used to be built, a new district is now being developed. An urban living and working space for more than1'500 people is being created right next to the railway station. Timbatec is responsible for the wood engineering for the first building of the new district. (Report in german)

  • Digital geplant und computergesteuert gefertigt: Wohnbau «Krokodil» in Winterthur

    Digitally planned and computer-controlled production: «Crocodile» residential building in Winterthur

    Zuschnitt, Issue No. 78/2020 - In the Lokstadt in Winterthur, a pioneering residential building, the so-called "Crocodile", is being built. In the former factory premises of the Swiss Locomotive and Machine Factory, close to the city center, converted industrial halls will be supplemented by a series of new buildings until around 2027. The "Crocodile" - named after the legendary electric locomotive used on the Gotthard mountain route - is currently one of the largest wooden buildings in Switzerland. (Report in german)

  • Mit BIM gewachsen

    Growing with BIM

    First, Issue No. 3/20 - The house "Crocodile" on the Lokstadt site in Winterthur has a skeleton of wood and a skin of stone and metal. Right from the start, the gigantic courtyard house was planned down to the millimeter. The BIM planning provides the first insights. (Report in German)

  • Begegnung mit dem «Krokodil»

    Encounter with the «Crocodile»

    Wir Holzbauer, January 2020 - The delegates of Lignum met in November in the Winterthur Technopark. There the long-standing Lignum director Christoph Starck was bid farewell with great applause. Hans Rupli informed about the transformation process of Lignum. Following the meeting, the delegates took a look at the timber construction project "Crocodile" in the Lokstadt area Winterthur. (German)

  • Die Kette schliessen

    Closing the chain

    Hochparterre, January 2020 - In the Crocodile development in Winterthur, BIM helped to make the advantages of wood visible in the competition to do. However, the method does not yet work consistently. Timbatec is committed to ensuring that timber construction has even more advantages in the future thanks to digital planning. In the report "Closing the chain" you can read about the challenges facing the industry. (German and French)

  • Hohe Häuser und ganze Stadtviertel als Holzbauten

    High-rise buildings and quarters made of wood

    Holzzentralblatt, January 2020 - Within the framework of the 25th "International Timber Construction Forum (IHF)" in Innsbruck from 4 to 6 December 2019, extraordinary high-rise and two housing development projects were presented: The major projects from Germany, Switzerland, Austria and Sweden, which were presented in the lecture block "Large Volume Buildings", provided ideas for planning construction projects of completely new dimensions in timber. In this context, Andreas Burgherr presented the "Crocodile" house in Winterthur with over 250 apartments. (German)

  • Ein Krokodil in Winterthur

    Ein Krokodil in Winterthur (Alemand)

    Baukader Schweiz, Novembre 2019 - Implenia Schweiz AG is building a new district in Winterthur: "The Lokstadt". One of the largest wooden buildings of the Switzerland is here under construction. The 30-metre-high building with over 250 apartments called "The Crocodile". Timbatec is the timber engineering of this flagship project. The magazine Baukader Schweiz has chosen the crocodile as construction site of the month. Our project manager Silvan Stierli guided journalist Flurina Schenk through the construction site and explained the project.

  • Selbstverwaltetes Wohnen

    Self-managed housing

    Bau & Architektur, 9.18 - Winterthur Genossenschaft für selbstverwaltetes Wohnen (Gesewo) is realizing around 80 apartments and flexible commercial space on the first floor in Haus Krokodil, the first building of the new Lokstadt. Lokstadt, a project by Implenia, is to become an actual new district in the middle of Winterthur over the next few years. Around 100 interested parties have come together under the umbrella of Gesewo. As future residents, they are accompanying the development of the building project and, in parallel, developing their house community, organization and self-management. In the case of the Krokodil house, which is being built largely of wood, Timbatec is responsible, among other things, for the statics of the wooden structure.

  • Haus Krokodil – direkt am Dialogplatz wohnen

    House Crocodile

    Schweizer Holzrevue, 7/8/2018 - In July 2018, Implenia laid the foundation stone at Dialogplatz in Winterthur for Haus Krokodil, a sustainable timber building with over 250 apartments. Timbatec is responsible for the design and structural engineering of the timber structure in the project. Haus Krokodil is part of the Lokstadt development in the middle of Eulachstadt. Like the entire Lokstadt, it is designed in accordance with the goals of the 2000-watt society and is largely made of wood from the first floor upwards. Compared with conventional solid construction, the timber construction method saves so-called gray energy, emphasizes the trade journal. The article in the Schweizer Holzrevue not only describes the project itself, but also the general advantages of living in a wooden building.

  • Grösstes Schweizer Holzbauquartier entsteht in Winterthur

    Switzerland's largest timber construction quarter is being built in Winterthur

    Wir Holzbauer 6.18 - Shortly after the currently largest Swiss timber housing estate "sue&til" was completed in Winterthur, the foundation stone was already laid in the same city for another project that will be executed in timber frame construction. In Lokstadt, centrally located in the Eulach city, the first building to be constructed is Haus Krokodil. With around 200 rental apartments and 60 condominiums as well as commercial premises, it will offer space for living, working and experiencing. The first residents are scheduled to move in in 2020. The consortium Baumberger & Stegmeier AG from Zurich and KilgaPopp Architekten from Winterthur are responsible for the design; Timbatec is responsible for the planning and for the statics of the wooden structure.

Print reference


Thun Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Niesenstrasse 1, 3600 Thun

Tel: +41 58 255 15 10

Zürich Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Ausstellungsstrasse 36, 8005 Zürich

Tel: +41 58 255 15 20

Delémont Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Avenue de la Gare 49, 2800 Delémont 

+41 58 255 15 40

Bern Branch

Timbatec Timber Construction Engineers Switzerland Ltd.

Falkenplatz 1, 3012 Bern

Tel: +41 58 255 15 30


Headquarters Vienna (A) 

Timbatec Timber Construction Engineers GmbH
Im Werd 6/31a, 1020 Wien 
Tel: +43 720 2733 01


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