Kornversuchsspeicher Extension by AFF Architekten – Revitalizing Berlin’s Historic Grain Warehouse

The Kornversuchsspeicher Extension in Berlin, designed by AFF Architekten, is a striking example of adaptive reuse architecture that bridges over a century of history with contemporary urban needs. Originally constructed in 1897–1898 at the former Lehrter freight station, this listed historic granary holds the distinction of being Berlin’s first warehouse to experiment with grain storage technologies. Built in response to the city’s rapid population growth in the late 19th century, the facility played a pivotal role in shaping modern storage and distribution methods.

From Grain Storage Innovation to Industrial Heritage

In 1916, a major extension was added to the Kornversuchsspeicher, specifically for comparing silo and bulk storage systems while testing state-of-the-art grain handling machinery. This update introduced a reinforced concrete skeleton—a pioneering material choice at the time—and incorporated distinctive trichet storage ceilings that defined the building’s industrial character.

A Sensitive Conversion for the 21st Century

The recent 3,588 m² transformation, completed in 2023, reflects a masterful balance between heritage conservation and modern functionality. AFF Architekten undertook a partial dismantling of the existing concrete support structures and introduced select structural interventions that open up interior volumes while preserving historical integrity. The most visible addition is the rooftop extension, which integrates harmoniously into the original industrial silhouette without overpowering its historic masonry façade.

Spatial Interventions and Design Approach

The design team approached the project with surgical precision, creating a sequence of space-defining interventions that respect the protected building while enabling contemporary use. Original brick façades and rhythmic window patterns remain central to the building’s identity, complemented by modern insertions that enhance daylight penetration, circulation flow, and spatial flexibility.

Internally, exposed structural elements—such as columns, beams, and arches—were retained and highlighted to showcase the building’s industrial heritage. The careful interplay between historic textures and modern finishes creates a spatial narrative where Berlin’s industrial past meets its dynamic present.

Collaboration and Technical Expertise

The project brought together a team of specialized consultants, including capattistaubach urbane landschaften for landscape design, Passau Ingenieure GmbH for mechanical engineering, and ISKP Ingenieure for structural engineering, with Zechbau GmbH as the general contractor. Their combined expertise ensured that every intervention aligned with both heritage protection standards and contemporary building performance requirements.

Kornversuchsspeicher’s Role in Berlin’s Urban Fabric

Today, the Kornversuchsspeicher Extension stands as more than just a restored warehouse—it’s a model for sustainable urban transformation, showing how historic industrial buildings can be reimagined for modern public, office, and mixed-use programs. Located in a rapidly evolving area of Berlin, the project underscores the value of preserving architectural memory while embracing innovation.

All photographs are works of  Tjark Spille