[3] There followed a brief period working in Cologne with an architect called Emil Schreiterer before he returned in 1888 to Stuttgart where he successfully undertook the second level examination for the "Government Master Builder" ("Regierungsbaumeister") qualification.
Deeply inset windows, sharply contoured details and bold shapes acknowledged dignified bourgeois traditions, while he was able to resist the fashion for endless glazed brickwork and superfluous attachments.
From 1904, with the Theodor Fischer increasingly influential across southern Germany, Henegerer's own later work took a more patriotic-romantic direction, with bay windows, arcades and half timbered effects.
It was under these romantic revival influences that he produced the Birkendörfle residential development (1907–1911), applying the style of traditional Black Forest houses.
In terms simply of quantity, Hengerer's greatest output involved much social residential accommodation which proliferated in Stuttgart between 1891 and 1910.