As an alternative for the linear 'make, use and dispose' model, the circular model strives for an industry without waste. Examples of products and systems to be able to move towards a circular building sector already exist. However, to realise an operating circular model in the construction sector, an important gap should be bridged. The technical knowledge on how to manufacture circular building products should be aligned with the requirements and complexities of architectural practice. In other words, only if manufacturers know which products are architecturally feasible to create, and if architects know which building products are circular, the sector's growth can be decoupled from its resource consumption. Technically, a lot of knowledge already exists, but its implementation needs further guidance.
Therefore, this research will develop an assessment method so companies are able to test and evaluate the architectural feasibility of their development, while architects are able to get guidance in selecting suitable structures and systems. The focus in this research lays on the implementation of preassembled transformable façade systems. The façade has a critical role related to energy performance and interior function of a building, while it has also an aesthetical aspect. Moreover, a transformable façade can anticipate future changes and can adapt to changing functions. Transformability relies on applying Design for Disassembly principles, which allows to efficiently maintain, repair, replace and reuse the building elements. This way, by implementing transformability, the lifespan of the façade is extended and it contributes to the reduction of excessive waste. The implementation of preassembled transformable façades will be tested in different contexts, as well as the feasibility assessment method. With this feasibility assessment method, construction teams will be able to test and evaluate the architectural and technical feasibility of a transformable façade in their context of use.