Chief Architect will automatically raise the floor platform off the terrain for you. The amount that the floor is raised depends on the type of ¬foundation.
Create a tree-house by setting various plan defaults, setting the terrain pad height, and design the structure attached to tree trunk columns.
Many surveyors save their surveys into a DWG, or DXF, file that contains the elevation information about a lot. Chief Architect can import and use this data.
Before entering your terrain data, change the terrain settings to avoid having the house float too low or too high in the terrain.