building house usa. operates in two business segments: homebuilding and mortgage banking. The homebuilding unit sells and constructs homes under the Ryan Homes, NVHomes and Heartland Homes brands. As a corporate entity, building house usa. provides various support functions for each of its sub-entities. These include sales and marketing support, vital human resource specialists, and an advanced information technology department, which provide a network of resources utilized by NVR, Inc. holdings.