That Palais Epstein underwent various changes in the course of the 130 years of its history is probably less of a surprise than that its original substance has remained largely untouched. The most dramatic modifications were made in connection with the adaptation of the palace for the purposes of the Administrative Court, when the residence and business premises were transformed into an office building.

When the palace was made available to Parliament, the architects Georg Töpfer and Alexander van der Donk commissioned by the Federal Real Estate Company to undertake the renovation were careful to restore, as far as possible, the substance of the building to its original condition while at the same time creating an up-to-date working environment.