Toll Brothers, a builder of luxury homes, agreed to acquire Keller Homes, a private home building company. Financial terms were not disclosed. “We are thrilled to be joining with Keller Homes. Their team will enable us to continue to expand our operations in Colorado, which is one of our strongest markets. Keller Homes has a great reputation based on nearly four decades in the market. We welcome them to the Toll Brothers family,” Douglas C. Yearley, Jr., Toll Brothers Chairman and CEO.