Free Calculate Rentable Area Add-in

The solution presented here calculates rentable area (or call it what you like) based on rentable area factor provided by user.

NOTE: Calculated rentable area value is not dynamically linked with other values so if you change area size or rentable area factor then you will have to rerun this tool to update rentable area value. Please read Readme.txt file contained in the zip file for more information.

The free add-in may be downloaded from Rahul Shah's Revit Sticky Notes blog.