Citizens Business Bank purchased the 24,600-square-foot office building at 3833 Ebony St. in Ontario for $6 million, or nearly $244 per square foot. The two-story office building, built in 1997, offers one elevator and a 2.28/1000 parking ratio. Armen Gourdikian, Sid Osborn and Michael DeSantis of Cushman & Wakefield Inc. represented the buyer and the seller, Telefutura Television Group Inc.