Solved Getting the height (and maximum height) of a foundation?

This is not a stupid question.

Code:

public static float GetGroundY(BuildingBlock block)
{
    RaycastHit hitinfo;
    position = block.transform.position;
    if (Physics.Raycast(position, new Vector3(0f, -1f, 0f), out hitinfo, 100f, UnityEngine.LayerMask.GetMask(new string[] { "Terrain" })))
    {
        return hitinfo.point.y;
    }
    return position.y;
}

You can use this function, or something very close to this function for both questions.

Code:

float currentHeight = GetGroundY(block);
float maxHeight = GetGroundY(block) + FoundationHeight

You'll have to figure out whatever the foundation height is by default. I don't know how to get that programmatically off-hand. I imagine a little trial and error could probably reveal it's somewhere between 2 and 4.