The Edna Cormier Building was erected in 1903 for Acadian businesswoman Dina Léger-Cormier. It was designed to replace Dina's previous store, which had burned down the year before. The rebuilt structure exhibits a typical Trading House style façade and a flat roof with a gentle central curve.

In 1915, Dina passed the business on to her daughter, Edna Cormier (1883–1971). During her life, Edna was both a keen businesswoman and a prolific figure in the Shediac community. She was one of the twenty founders of the Caisse Populaire cooperative and the only woman in the group. She also helped create the Shediac Co-operative, and as noted in the book "L'histore se raconte" by New Brunswick historian Régis Brun, Edna's business expertise was vital for allowing the Shediac Co-operative to obtain certain goods in the 1930s, when rations were making it difficult to acquire many staples such as flour and sugar. Lastly, Edna was a member and later vice president of the town planning commission and supported college students in need through scholarships.

In recent years, the words "Édifice Edna Cormier" have been engraved onto the building's front facade to acknowledge her contributions to the town.

It was named the Edna Cormier Building after some renovations took place in recent years. It is located in the town’s business district, and features a flat roof with a symmetrical Trading House style façade. She was never married, but she was very involved in the creation of Caisse Populaire and the Shediac Co-operative. The book "L'histore se raconte" by Régis Brun recounts that the co-operative relied on Edna's expertise to obtain certain goods in the 1930s when rations were making it difficult to get staple foods like flour and sugar. She supported college students in need and was a member (and eventually Vice-President) of the town planning commission.