It should be quite possible to convert models saved in IGES 3D format (.iges, .igs) to plenty of other 3D model formats, including special BIM formats, such as Industry Foundation Classes files (.ifc). This can be mainly done with tools that deal with architecture and building modeling, for example FreeCAD.
Convert IGES 3D exchange format to Industry Foundation Classes file.
We found one software available in the database for this conversion.
Multiplatform software - convert iges to ifc on any platform
An open source multiplatform 3D CAD/MCAD/CAx/CAE/PLM modeler
Convert from iges file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.