Marienfelde Quartier Mariengrün is a sustainable urban development project in Berlin's Tempelhof-Schöneberg district that transforms a former industrial site into a model neighbourhood combining residential housing, green spaces, and smart city technologies. The development is designed to demonstrate how new urban quarters can be planned and built from the ground up with sustainability, climate resilience, and digital connectivity as core design principles rather than retrofitted add-ons. The masterplan integrates energy-efficient building standards (KfW 40 or better), district-scale renewable energy systems including rooftop solar and geothermal heat, smart building management systems, and comprehensive green infrastructure including urban gardens, biodiversity corridors, and rainwater retention landscapes. The neighbourhood is designed around the principles of the 15-minute city, with local amenities, schools, workspaces, and recreational areas within walking or cycling distance of every home. A car-reduced mobility concept prioritises cycling, pedestrian movement, and shared electric vehicles, with smart mobility hubs providing seamless connections to Berlin's public transport network. IoT infrastructure embedded throughout the development supports real-time monitoring of energy consumption, water management, air quality, and community facility usage, providing data that enables continuous optimisation of neighbourhood operations and informs future urban development projects across Berlin. The participatory planning process involves future residents and neighbouring communities in design decisions, reflecting Berlin's commitment to democratic urban development. Quartier Mariengrün serves as a practical test case for Berlin's sustainable construction and smart city guidelines, generating evidence and best practices that can be applied to other new-build developments in the capital and across Germany. The project aligns with Berlin's climate neutrality targets and its Gemeinsam Digital smart city strategy.
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