The Challenge:
Two residential buildings in Berlin, built in 1954 and comprising 21 apartments (1,043 m²), display the typical challenges of their era: high energy losses, an aging building fabric, and rising utility costs. A scenario that affects many post-war neighborhoods. The goal is to significantly improve energy performance through serial renovation, while also enhancing living comfort and ensuring the buildings’ long-term resilience.

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The Approach:
The focus is on serial renovation, starting with the creation of a new, highly insulated building envelope. This includes prefabricated facade elements with modern windows as well as comprehensive insulation of the roof and basement ceiling. In addition, a photovoltaic system will be installed. The energy concept is complemented by decentralized ventilation systems and hydraulic balancing of the radiators. The existing district heating supply and central domestic hot water generation will be retained as an efficient foundation.

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The Result:
Once completed, the project is set to achieve a substantial improvement in energy efficiency, reducing final energy consumption by more than 70%. CO₂ emissions will be significantly lowered through the combination of district heating and photovoltaics. The serial renovation approach ensures fast, cost-efficient implementation with minimal disruption for residents. The outcome will be a modern, energy-efficient living environment that creates lasting value for tenants, property owners, and the environment alike.