The land was divided into long, narrow plots, on which typical Hamburg merchant houses were built.

The waterway separating Cremon from the neighbouring island of Grimm, the Steckelhörnfleet, was also filled in after World War II.

In 1246 Cremon was absorbed by the city of Hamburg, and together with Grimm formed the parish of the newly built St. Catherine's Church.

In 1937, having survived the Hamburg fire of 1842 and almost one hundred years of urban development, the designation "hanseatische Traditionsinsel" was obtained.

Still located between Fleet Street and Cremon 33-36 (formerly outer dike), is the last of the old historic warehouse of the 18th and early 19th century.