https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275586#M143077 I would probably try publishing a multistory module file from the existing building and linking that to your new building file. Tue, 12 Apr 2016 06:38:38 GMT Erwin Edel 2016-04-12T06:38:38Z https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275585#M143076 <DIV class="actalk-migrated-content"><T>This is a typically Australian scenario: I am doing a renovation that involves lifting the existing house and building in underneath. I think I have to use 2 files because of the changed floor levels.<BR /> <BR /> Has anyone worked out a good way of documenting such a renovation within a single file, using the renovation toolset?</T></DIV> Mon, 11 Apr 2016 16:32:55 GMT https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275585#M143076 Daniel Lindahl 2016-04-11T16:32:55Z https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275586#M143077 I would probably try publishing a multistory module file from the existing building and linking that to your new building file. Tue, 12 Apr 2016 06:38:38 GMT https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275586#M143077 Erwin Edel 2016-04-12T06:38:38Z https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275587#M143078 I would probably model the building so the existing floor is the upper floor level, and just lie (i.e. 2D) about levels and ground lines on any existing elevations and sections. Use renovation filters to distinguish between existing and proposed. Tue, 12 Apr 2016 20:53:53 GMT https://community.graphisoft.com/t5/Modeling/Renovation-house-raising/m-p/275587#M143078 Anonymous 2016-04-12T20:53:53Z