1. A computer implemented method for determining a layout and wiring estimation for a heating, ventilation, and air conditioning (HVAC) system of a building, comprising: receiving, by a computing device, information from a building information model associated with a building; receiving, by the computing device, a wiring diagram that includes a controller and a number of HVAC devices of an HVAC system of the building from a pre-engineering tool associated with the building, wherein the pre-engineering tool is separate from the building information model and determines which of the number of HVAC devices of the HVAC system need to be connected to the controller of the HVAC system in the wiring diagram based on a number of input/output (I/O) assignments for the HVAC devices of the HVAC system, and wherein the number of HVAC devices of the HVAC system include at least one of a chiller, a boiler, a pump, a fan, an air damper, an air handling unit, a coil, an air filter, and a cooling tower; and determining, by the computing device, a layout and wiring estimation for the HVAC system of the building based, at least in part, on the information from the building information model and the wiring diagram from the pre-engineering tool that is separate from the building information model, wherein the determined wiring estimation for the HVAC system of the building includes a wiring length of the HVAC system of the building.