DB InfraGO Awards €130.67 Million Contract for S-Bahn Berlin S21 Tunnel and Hauptbahnhof Station Works

Germany’s rail infrastructure modernisation continues to gather pace with the award of a major construction contract under the S-Bahn Berlin S21 new building project. DB InfraGO has officially awarded a €130.67 million public works contract for complex tunnel, trough, and station construction works linked to the future S21 transport station at Berlin Hauptbahnhof, one of Europe’s most important rail hubs.

The contract award reflects Germany’s sustained investment in urban rail capacity, sustainable mobility, and long-term transport resilience in the capital region.

Project Background and Context

The S-Bahn Berlin S21 project is a flagship rail infrastructure initiative designed to create a new north–south S-Bahn connection through central Berlin. Once completed, the S21 line will significantly improve passenger flows, reduce congestion on existing routes, and strengthen direct connections between Berlin Hauptbahnhof and surrounding districts.

This latest contract forms part of the ongoing phased development of the project and focuses on some of its most technically demanding civil engineering components.

Contract Details

• Tender Reference: TEI-O-B/11/260348

• Notice Reference: 38251-2026

• Document Type: Contract Award Notice

• Contract Type: Works

• Contract Value: €130,673,209.35

• Contract Date: 16 January 2026

• Dispatch Date: 16 January 2026

• Publication Date: 19 January 2026

• Project Location: Germany (Berlin)

• Lot: Lot 1

The awarded package relates to Award Package VE 03.2, including VE 02.0, under the broader S-Bahn Berlin S21 construction programme.

Scope of Work

The contract covers extensive underground and structural works required for the next phase of the S21 development. Key elements include:

• Construction of tunnel structures forming part of the S21 rail alignment

• Development of trough structures supporting rail and station infrastructure

• Structural works for the S21 transport station at Berlin Hauptbahnhof

• Integration of new infrastructure with existing railway assets and urban surroundings

These works are critical for enabling future track installation, signalling, and operational readiness of the S21 line.

Contracting Authority

The contracting authority for the project is DB InfraGO, Germany’s national rail infrastructure manager and a subsidiary of Deutsche Bahn. Based in Schönefeld (NUTS Code: DE406), DB InfraGO is responsible for planning, delivering, and maintaining rail infrastructure projects across the country.

Through this procurement, DB InfraGO continues its mandate to expand and modernise Germany’s rail network in line with federal transport and climate objectives.

Winning Contractor

The contract has been awarded to JOINT VENTURE S-21 Berlin Tunnel and Trough Structure, led by Implenia Construction GmbH, a well-established European construction company with strong expertise in tunnelling, underground construction, and large-scale transport infrastructure projects.

The joint venture structure reflects the technical complexity and scale of the works, requiring advanced engineering capabilities, risk management, and coordination in a dense urban environment.

Economic and Strategic Significance

With a value exceeding €130 million, the contract represents a substantial investment in Berlin’s construction and infrastructure sector. The project is expected to support skilled employment, drive demand across the civil engineering supply chain, and contribute to long-term economic growth in the region.

From a strategic perspective, the S-Bahn Berlin S21 project plays a key role in:

• Enhancing urban mobility and public transport capacity

• Strengthening rail connectivity at Berlin Hauptbahnhof

• Supporting Germany’s sustainable transport and climate goals

• Improving passenger experience and network reliability

Once operational, the S21 line will help accommodate rising passenger numbers and reinforce Berlin’s position as a major European transport hub.

Outlook

The award of Award Package VE 03.2 marks a significant step forward in the delivery of the S-Bahn Berlin S21 project. As construction progresses, further contracts related to track works, systems installation, and station fit-out are expected to follow.

For industry stakeholders, the project highlights ongoing opportunities within Germany’s rail infrastructure market and confirms DB InfraGO’s continued commitment to large-scale public investment in transport infrastructure.

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