Editing the Terrain Perimeter

Select the terrain perimeter, then click the Open Object

edit button to open the Terrain Specification dialog.

On the General tab, make sure Flatten Pad and Auto Calculate Elevation are unchecked, and change the Elevation to 12 inches.

Flatten Pad flattens the building pad around the house. By unchecking this, the terrain will be allowed to slope where it intersects the house.

Auto Calculate Elevation places the house at average terrain height. By unchecking this we can control the building's height relative to the terrain.

Changing the elevation to 12 inches raises the terrain 12 inches above the first floor.

Click OK to close the Terrain Specification dialog.