Offices on Mackenzie was first built in 1948 as Reavis Elementary School. In 1982 the school district sold the building to new owners who converted it to a professional office space. The building offers stunning atriums that have been awarded Best Commercial Garden by Affton Days. Offices on Mackenzie has two floors with a wide-open floor plan that has a history of low turn-over in tenants. In 2005 Michael Butz & Steve Butz joined 3 others in purchasing the building, and in 2021 the brothers became the sole owners of Offices on Mackenzie. They have since begun renovating the building to update its technology and increase security.