The two-storey gatehouse in front of the gate tower dates from the 15th century. Its ground floor was covered by a rib vault in two bays, separated by a round transverse arch. The gate arch is rounded and still shows remains of the fittings for the former drawbridge; in front of it there was probably a moat. On the western outer side, two low-lying loopholes of Type A are located. The upper floor was presumably used as living space, was roofed, and had small rectangular windows, as can be seen in historical photographs.

Behind the gatehouse adjoins the gate structure of the inner castle dating from the 14th century. It consists of a three-storey gate tower, which is open on the inner side. On the outer side, on both sides of the pointed gate arch, there are rebates for the former portcullis. The right rebate is completely preserved, while the one on the left side was partially walled up. The second upper floor is barrel-vaulted, while the third upper floor featured a shooting chamber on the north side with a large embrasure.

In 1440, Landgrave Leopold reinforced the castle complex and, making use of the existing masonry remains, carried out various structural alterations. Thus, the gate structure today consists of an older inner part and a younger outer section. With the construction of a zwinger around the inner castle in the 15th century, the original gate tower received an outer forebuilding in the form of the deep, two-storey gatehouse.