The two-storey, late-baroque castle has a U-shaped layout, short wings and a small interior courtyard. Archways originally opened towards the courtyard from both levels; however, the upper archway was later glassed in. The main facade is symmetrical and divided into nine axes. A portico was constructed along the central axis.
In place of Rhédey Castle once stood an abbey, church and monastery re-enforced with turrets. In 1569, the Kornis family commissioned the construction of a castle on the ruins. The first iteration of Rhédey Castle was built by masters from Târgu Mureș/Marosvásárhely in the second half of the 18th century, using materials from the remains of Kornis Castle.