The station building was built to a design by Niels Peder Christian Holsøe who had become head architect of the Danish State Railways in 1880.

[2] Prior to his appointment, Holsøe had developed a standardized building, consisting of a high central section flanked by two lower shoulders, in a romanticizing Neo-Romanesque style.

This design was introduced with the construction of Strib railway station in 1860.

Holsøe also designed a new post office which was built next to the station.

[1] Media related to Assens Station at Wikimedia Commons