Location: Oslo, Norway | Client: Entra
Phase: Competition (1 of 4 finalists)
Year: 2012-2013
Design Team: Solbjør Arkitektur, ahA+, Gether, DOF Engineers


DOF has been enthusiastically working with the design team of this competition in order to deliver a sustainable, cost-effective, innovative, concept building. The motto of the project, “Harvest”, embodies the meaning of our approach to design a truly sustainable building. We take the proposal of the Cradle-to-Cradle original thinkers seriously and we have tried to make it real: Design buildings as trees and cities as forests.

har·vest (noun) (verb)
crop that is gathered
quantity of crop
collect biological material
the consequences of previous actions or behavior


These kind of buildings can become climate regulators that produce more energy than they use, can store CO2, can use materials with a measurable positive impact on humans, can reduce and recycle the use of other materials and can create a healthy, safe, beautiful and inspiring environment. 

These are the principles that guide our team to design the renovation and extension of the Posthuset in a congested urban area. The findings explained here could become an example of future sustainable interventions, in accordance to the Nordic Built Charter. In summary, our sustainable strategy is to use materials, constructions methods, energy systems and installation infrastructure that follow the main principles of the C2C approach: Mimic closed loops of natural process, maximize the use of renewable energy for the construction and exploitation of the building and design the best-tailored solution to create a healthy environment for this specific location.  

At the same time these kinds of interventions have to be economically viable, and this is the other important guiding principle of our proposal. Our three most innovative proposals to turn this into a reality are:

• Use massive timber elements as the essential structural material for a highrise building, which is a natural, healthy, renewable and, in this case, a local material.

• Active House Concept that harvests energy and excess heat trapped in the building as well as harnessing ambient energy by means of storage techniques adapted to local conditions and oppor tunities, to supply in situ renewable energy when most needed.

• The real challenge lies in proposing the above solutions that radically improve the environmental performance while balancing costs with market willingness. Harvest goes beyond BG14 and the refurbishment of Posthuset. It is a concept of a new and innovative way to meet the challenges of tomorrow. 



We are proud to announce that we are selected to second stage of the Nordic built challenge in a sustainable building renovation competition for the Posthuset building.

The wooden addition to existing building enhance its functionality, makes it smart and aesthetically appealing, a building in the best of the Nordic design traditions. The proposed wooden structure is tha tallest timber structure in the world.

The proposed Active House Concept harvests energy. It feeds on excess heat trapped in the building as well as ambient energy at optimal times by means of storage techniques adapted to local conditions and opportunities. The approach to construction material results in a low C2C carbon footprint utilising the local and existing energy resources in the best possible way, giving Oslo a new sustainable landmark project.

Images © Solbjør Arkitektur and ahA+

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