Design for disassembly is a key strategy for ushering the building industry into the age of circular economy. Timber offers an efficient structural solution to meet growing environmental challenges. Yet the timber material lifecycle has primarily remained linear. Design for disassembly and reuse can close timbers material loop and build a circular value chain. The HasleTre project is Norway’s first timber office building designed and constructed explicitly with the intention of future disassembly and reuse. In this paper, the architects at Oslotre presents the key design solutions that have been developed for the project. Timber-to-timber connections have been central to the project’s design and offers interesting solutions for the circular future of timber architecture and engineering.