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Topping out ceremony in Cologne-Marienburg: The new residential ensemble 515” is taking shape!
On October 13, 2025, Swiss Life Asset Managers celebrated the topping-out ceremony of the “515” residential project in Cologne-Marienburg, which includes 24 condominiums and 5 townhouses and offers the highest level of energy efficiency.
Topping out ceremony in Cologne-Marienburg: The new residential ensemble 515” is taking shape!
An important construction project is causing a sensation in Cologne: the topping-out ceremony for the “515” residential ensemble took place in Cologne-Marienburg on October 13, 2025. The developer, Swiss Life Asset Managers, has created a versatile concept that not only promises comfortable living, but also focuses on sustainability. With 24 condominiums measuring between 35 and 95 m² and five townhouses up to 140 m², the project offers a wide range of living options. The generous window fronts and the use of high-quality parquet floors promise light-flooded rooms and a stylish ambience. In addition, the townhouses have their own gardens and cellars - perfect retreats for future residents. One can look forward to completion, which is planned for the first quarter of 2027. The project [konii.de](https://www.konii.de/news/swiss-life-asset-managers- Feiert-richtfest-fuer-das-neubauprojekt-515-in-koeln/) stands out for its resource-saving living concept, which meets the KfW 55 standard and achieves energy class A+. Highlights such as photovoltaic systems and well-thought-out open space design play a central role.
Cologne-Marienburg is a sought-after residential area with a quiet environment and excellent connections to the city center. The topping out ceremony, at which greetings and speeches provided the ceremonial setting, marks an important step forward in the construction process. The guests present and the construction management, who also opened the construction site for viewing, shared their enthusiasm about the successful project.
Sustainability at the center
The topic of sustainability runs like a common thread through residential construction in Cologne. Another exciting project that was recently completed are 136 apartments, which were also built to the KfW 55 standard. These units set an example for energy-efficient construction and modern urban development, as eco-plan.net reports. This not only includes an underground car park with parking spaces for the residents, but also sustainable building materials and smart building technology, which were implemented in the new building. Compared to conventional new buildings, the primary energy requirement was reduced by 45%.
The modern architecture and integrative living concepts of these projects offer numerous advantages for future residents, from high living comfort to energy-saving construction. For the city of Cologne, such developments are not only progress in the creation of new living space, but also an important contribution to reducing CO2 emissions and supporting the energy transition. Another impressive project is the planned residential area in an up-and-coming district of Cologne, which will include over 100 residential units, more than half of which are also planned to the KfW 55 standard. Here, specific attention is paid to a high quality of stay and an infrastructurally well-connected, largely car-free environment, which particularly benefits families and working people (described in detail at solmaz-partner.de).
Overall, the building and residential landscape in Cologne remains exciting. Whether through innovative concepts such as the “515” residential complex or the numerous energy-efficient new buildings – it is clear that the construction of the future must not only be comfortable, but also sustainable. Cologne shows once again that a good knack for modern architecture and environmentally friendly technologies is more than just plans on paper.