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.
The building contains the architectural style characteristic to Kós Károly, which is inspired from folk architecture. The ground floor of the castle has no plaster, it is a masonry of broken stones, while the upper-floor is made out of wood. The building has gable roof and its characteristic tower, with rounded ground floor, is covered with shingles.