Modernization. A way to sustainability?

Is modernization really always sustainable and economical? Flexibility and cost efficiency, e.g. through subsidies, are of the utmost importance, especially in renovation and retrofitting. As a project planner, how much compromise am I willing to make, especially in terms of design and functionality?

Amandus Sattler, Allmann Sattler Wappner Architects

Jens Flegler, Aritco Germany GmbH