Zehlendorf is a wealthy district overall, but some areas are much posher than others. The most exclusive enclaves are found in Dahlem, Nikolassee, and Wannsee. The premiere properties are those with lake views, including a cluster of estates around Schlachtensee. Many of these mansions and estates date from the late nineteenth century; many are now protected historical landmarks. Some large older houses, especially near the centre of Zehlendorf, are divided up into nice flats, but most accommodation in Zehlendorf is owner-occupied single-family homes with gardens, including houses more modest in size and style than the high-profile lakeside villas.