 In 2015 there were 2,176 private households in Wartau with an average household size of 2.38 persons.In 2015 about 67.1% of all buildings in the municipality were single family homes, which is greater than the percentage in the canton (60.5%) and greater than the percentage nationally (57.4%).Of the 1,446 inhabited buildings in the municipality, in 2000, about 69.3% were single family homes and 14.2% were multiple family buildings.