The company was formed in 1925 as Martelleria Maggiora by Arturo Maggiora as a high quality car body maker - a coach builder or 'Carrozzeria'. Their work has graced many Fiat and Lancia cars like the early Fiat 1100 Viotti Giardiniettas and the Lancia Flaminia Tourers. The company was grown and extended, with several Abarth and Cisitalia bodies produced. In 1951 it moved to Borgo San Pietro Moncalieri where car like the Glas (BMW) GT (1963), Glas V8 (1965) and the Maserati Mistral (1963) were built.
Maggiora merged with Sanmarco and Lamier to form IRMA SpA in 1991 - later a major supplier to the Ducato range. Maggiora SRL took over the old Lancia factory in Chivasso north of Turin in 1992, and produced there from October 1992 to 1994 the last Integrale Evoluzione. The new capacities in the Lancia factory were later used to produce the Fiat Barchetta - at around 50 bodies a day. Some complete cars were produced here too (including the rare Kappa Coupe).
In addition many design studies, prototypes, special orders e.g. were produced by Maggiora, these have included soft top Unos and Cinquecentos, special Integrales, a Barchetta Coupes, a Puntograle, the Lancia Thesis Coupe prototype.