Architecture from and in Berlin has always been a reflection of the current global building sector and a trend indicator at the same time. Whether residential construction, landscape design, or traffic planning - the concepts developed in the German capital are internationally renowned. As every year, Building Berlin once again presents the most interesting projects of the past year. Thematic essays that add a reflective dimension to the representative examples complement the presentation of the roughly 65 projects across eight chapters. This year, the volume focuses on the mega-theme of densification. The range of solutions for making a city more compact extend from closing gaps on small corner lots, via new buildings that utilize inner courtyard spaces or mini-houses for urban nomads, to temporary commercial architecture and the expansion of universities under the ground.