The Alexander Smith House, also known as Twenty-four Trees, is a property in Brentwood, Tennessee that was listed on the National Register of Historic Places in 2005. It was built or has other significance in c.1800, 1812, and 1920. It includes I-house and other architecture. When listed the property included one contributing building and three non-contributing buildings, on an area of 3 acres (1.2 ha). The property was included in a 1988 study of Williamson County historical resources.