The method, the know-how, the software…

How to sustainably develop your existing buildings

Energy efficiency

Ecological footprint, CO2 balance, climate targets … – everybody talks about energy efficiency. However, true sustainability is not characterized by being awarded a certificate for a single lighthouse project. Rather, the building stock in its entirety must become more sustainable.



Holistic: the economical component of energy efficiency

As one of the 16 initiators of the DGNB, CalCon dealt with the question how this can be implemented in an economically sensible way. Not only is it necessary to know the energetic state of each building. It is also important to qualify the portfolio according to its energy-saving potential. On this basis, the different measures for energy recovery are then prioritized. In addition, synergies with regular construction measures can be used.

In this way you make your entire building stock fit for the future – without losing sight of the economy.


Find out more:

How does energetic scoring help you to increase energy efficiency?
>> Read this article

What does the current energetic state of residential real estate look like?
>> Here are the results of our analysis

How to analyze the energetic quality of existing buildings?
>> Find out more


Our services at a glance:

  • Establishment of an energetic scoring
  • Consulting on the definition of an energetic assessment
  • Sustainability analysis
For corporate real estate <br/> management
For corporate real estate

Any questions?