KCAP and Kraaijvanger Architects transform iconic Stationspostgebouw The Hague

KCAP and Kraaijvanger Architects transformed the Stationspostgebouw, a former postal sorting centre next to the Hollands Spoor train station in The Hague, into a sustainable and social work environment for the 21st century while respecting the original architecture. The building is home once again to PostNL, now serving as its headquarters.

The 30.000 m2 building, regarded as a textbook example of Functionalism, was one of the most modern postal sorting centres in the Netherlands on completion. It stands out for its distinctive pale brick facade with curved forms and glass block windows, which conceals high but deep floor areas. Conceived as the most prominent building along the rail, it has always been a landmark for and within the city of The Hague.

Photo © Ossip van Duivenbode

One of the transformation’s key results is the increased daylight access, achieved by modifying the facade and inserting vides. Because of its status as a monument, however, it was not possible to make major structural changes. An additional challenge was to renovate the building in such a way as to bring back the monumental character.

Therefore, the restoration concept focused on the main load-bearing structure, keeping the existing beams and columns intact. Especially since the Stationspostgebouw is one of the first examples of the use of prefab concrete columns in the world. The Stationspostgebouw also had to meet the most ambitious sustainability requirements.

Photo © Ossip van Duivenbode

It has been redesigned according to WELL and BREEAM standards, and is the first national monument to be certified with the highest achievable energy label ‘A’ in the Netherlands. A glass ‘second skin’ on the inside of the building provides an almost invisible layer of insulation. In this way, the monumental facade was preserved, while the building simultaneously met the requirements.

This solution also saves a considerable amount of energy, helps to reduce noise from road and rail traffic, and is supported by further energy-saving measures. In line with circular economy principles, existing materials are re-used wherever possible. The glass block windows, combined with skylights, originally provided the building with ample light. However, due to the depth of the floors, this proved insufficient for a modern office environment.

Photo © Ossip van Duivenbode

To increase the amount of daylight on the lower floors, KCAP inserted vides throughout the building. These staggered vides, at times wide and at times narrow, create a lively interplay between single-height and double-height floors, resulting in an impressive atrium that opens up the building and makes people ‘see and be seen’ – the new office’s vibrant heart. This intervention also recalls the grandeur of the machines that once dominated the space.

Irma van Oort, partner at KCAP: “The atrium, surrounded by cascading floors and traversed by bridges and stairs, can be read as a metaphor for the conveyor belts and sorting machines that used to deliver mail directly from the station.” These informal routes help people to get together but also to explore the space by individual means, fostering a pleasant, spontaneous atmosphere.

Photo © Ossip van Duivenbode

The first floor houses the ‘Community Centre’ with a reception, café, common areas, meeting zones and workspaces. The upper floors have a flexible set-up, which allows a variety of workplace concepts to be offered and arranged according to different users’ needs. Efficient floor plans and innovative technical features also allow for flexibility in the future.

The interior design by Kraaijvanger Architects responds to PostNL’s need for this new way of working, focussing on flexible collaboration, versatile use and employee well-being. A particular challenge was to retain as much daylight as possible while dividing the very large floors into smaller, more intimate units.

Photo © Ossip van Duivenbode

The result is a social working landscape focussed on exchange and connection. Chantal Vos: “Our environment has a major impact on how we learn, work and live, think and feel. Many offices are too closed and isolated or completely open and too exposed. A good workspace is all about balance, an environment where people feel at home”. Therefore, Kraaijvanger Architects applied the typology of a house to the Stationspostgebouw.

Principally, a house has partially defined spaces and a diversity of room sizes, which are connected to each other in different ways with different levels of privacy. Using this principle for an office space, inspiring spaces were created for a variety of activities, in small and larger groups. By linking the informal and formal, open and enclosed areas, the building’s new spatiality has been preserved. Sourcer by KCAP.

Photo © Ossip van DuivenbodeLocation: The Hague, the Netherlands

Architect: KCAP

Interior Architect: Kraaijvanger Architects

Collaborators: J.P. van Eesteren / BESIX (construction), Unica (installations), Traject (management and sustainability), Coors (interior construction)

Client Kraaijvanger Architects: LIFE, PostNL

Client KCAP: LIFE, SENS real estate

Program: 30.000 m2 renovation and transformation of a national monument into a multifunctional office building as headquarters for PostNL with rentable spaces for other users, hospitality, Community Centre, co-working spaces and informal meeting places

Year: 2022

Photographs: Ossip van Duivenbode, Courtesy of KCAP
Photo © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePhoto © Ossip van DuivenbodePlanSection

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