The present disclosure provides systems, methods, and computer-readable storage devices for automatic generation of a design model of a building. To illustrate, a computing device may generate a design model, such as a three-dimensional model of a building, based on criteria and layout information. The design model may indicate a layout of one or more rooms (or other spaces), locations of one or more hallways, doors, windows, furniture, fixtures, or a combination thereof, within the building. The computing device may perform a load analysis based on the design model and enable selection of equipment to be included in the building based on the load analysis. Virtual models of the equipment, and connections between the equipment, may be automatically added to the design model by the computing device, thereby reducing user input and cost, and improving speed, associated with the building design process.