Patch22 vs Top-Up, a comparative case study of two open buildings

Purpose This paper shares the experience of developing and designing two adjacent projects, Patch22 and Top-Up, in Amsterdam using Open Building principles. It discusses the architectural, technical and legal challenges and opportunities encountered, as well as the influence of economic and legal factors on future adaptability. Design/methodology/approach By analyzing and comparing Patch22 and Top-Up, this paper identifies the principles necessary for implementing Open Building in practice. Findings The adaptability of buildings to future uses largely depends on legally ensuring flexible principles before the initial delivery and sale. While technical Open Building principles are relatively easy to integrate, this paper offers technical and architectural recommendations for their implementation. Social implications Since the designers of the buildings are also the initiators and real-estate developers of the buildings, this paper provides insights into the technical, architectural, legal and economic conditions for successfully implementing Open Building principles. Originality/value Patch22 and Top-Up exemplify the revival of Open Building principles in the Netherlands (2010–2020), demonstrating the ambition of a multidisciplinary team to create reusable buildings. This paper shares the successes and challenges faced in contemporary building practice.