1. A method for identifying wall features in an object model represented in a CAD system, comprising: loading an object model in a CAD system; receiving a selection of a first face of the object model by the CAD system; finding candidate wall faces by the CAD system and storing the candidate wall faces in a candidate list; designating at least one candidate wall face in the candidate list as a counterpart face to the first face based on at least one of geometric conditions, spatial proximity, or topological proximity; and storing the first face and the counterpart faces in the CAD system as a wall of the object model.