The Challenge:
A large residential neighborhood in Erlangen, with uniform buildings typical of many older housing estates, faced significant renovation needs, high energy losses, and outdated technical systems. These neighborhoods present both challenges and opportunities for the energy transition in the building sector because of their scale and uniformity. This pioneering project aimed to show how large-scale, serial renovation can deliver efficient, sustainable, and cost-effective modernization across an entire neighborhood.

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The Approach:
The project focused on a deep, serial energy-efficient renovation of the neighborhood. Prefabricated timber-frame façade modules—complete with insulation, windows, electric blinds for sun protection, ventilation elements, and fiber cement panels with a wood finish—were quickly installed on the existing structures. The roofs were fully refurbished, including repairs and the addition of photovoltaic systems to harness renewable energy. Old gas heating systems were replaced with modern heat pumps, and basement ceilings were upgraded with mineral wool insulation to maximize energy efficiency.

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The Result:
This project demonstrates the strengths of serial renovation, especially in large residential areas, by enabling efficient, sustainable, and economically viable modernization. The Erlangen initiative has set a new benchmark for renovating entire housing estates, resulting in a significant improvement in energy performance, a better living environment, and real added value for residents, housing companies, and the environment.