Lanzendorf Castle is located in the municipality of Lanzendorf, cadastral municipality of Oberlanzendorf in the Vienna Basin, Lower Austria, about four kilometers south-east of the Vienna city limits. It stands in the south of the village next to the thoroughfare.
In its turbulent history, the castle has been rebuilt several times. It is now a block-like, three-storey building over an L-shaped floor plan. The street front is kept simple with seven irregular window axes and corners with decorative ashlars. In the middle of the hipped roof sits a square turret covered with a pointed tin helmet. It probably comes from the reconstruction in 1758. The courtyard front has windows with profiled walls and straight roofing, which are largely covered by extensions. On the side of the large park there is a two-storey loggia, the columns of which support a flat ceiling on the ground floor and a wicker vault on the upper floor. This addition is relatively new. To the south, there is also a two-storey porch with a grooved ground floor. The high, round-arched French windows on the upper floor are separated by double pilasters. Behind it is the former ballroom. A chapel was built on the upper floor of this wing around 1830. The extensions on the courtyard side also date from this year. In place of a roof, this porch supports a roof terrace bordered by a stone balustrade. On the side of the street there is a tower-like roof house. An outbuilding is connected to the main building by a flat-roofed colonnade. This and other, mostly two-storey buildings were built at the end of the 19th and beginning of the 20th century as administration and care buildings. The former defensive wall still surrounds parts of them today. The formerly large dairy farm on the other side of the street was demolished in 1998, only the stables remained.