After the end of the war, Ercole Castagna and the parent company moved into new production facilities in the Lombard community of Venegono Superiore.

Castagna still designed and built some special bodies for Alfa Romeo and Lancia chassis, but given Italy's economic difficulties in the early post-war period, it did not find enough customers to continue the company permanently.

Following on from the customer base of Ferrari, Mainetti & Orsaniga, the automobile bodies were also intended for wealthy clients.

Among the sensational creations from the pre-war period was a teardrop-shaped limousine called Aerodinamica, which was commissioned by the Milanese industrialist Marco Ricotti in 1914 and based on the ALFA 40/60 HP.

The company designed and built unique models and small series for chassis from Alfa Romeo, Fiat, Isotta Fraschini and Lancia, and more rarely also from Mercedes-Benz and Duesenberg.

From 1929 onwards, station wagons were also created in the Woodie style adopted from the US, which the Castagna Milano company, which was founded in 1994, also repeatedly took up.

In the second half of the 1930s, Emilio Castagna's designs were often influenced by the trend in aerodynamics; Numerous bodies with flowing, rounded lines were created, particularly on Alfa Romeo 6C chassis.

After the end of the war, the company continued to produce a few unique pieces and small series upon customer request, increasingly in the pontoon style since the late 1940s.

[1][11] The latest works of the company include a series of customised runabout and wood-panelled cars based on Fiat 500 and Mini.