[CGMike]

Here's a screen-cap of what I mean by the extrude result...

You see the door inset has been extruded "into" the house... but you still see the back face of the bottom surface from the base house object. I shouldn't see that. The only thing I can think to do is keep some kind of "ledge" beneath the door and not have it go all the way to the ground, but that's not what I'm after.

If I delete that bottom surface, I've just deleted the entire bottom of the house, though I suppose I wouldn't see that anyway. But I'm sure there's gotta be a better way of going about that.

Something just isn't "clicking" with this whole process to me.

Ask me to model you a tree, or a cliff, or a waterfall, etc.. I can do it. Houses, or anything structured completely eludes me.

Hope the screencap helps.

As for the boolean.. So what you're saying is that when you perform a boolean, it's creating a copy of both operands and that's what's being deleted, not the original object?