This is… interesting, but the UI and the graphics leave a lot to be desired. Some might be fixed, some might not. Biggest problem with the UI and the graphics (graphics are a part of the UI) is… it's too flat for an isometric view with exactly four angles. Easy to hit the wrong spot (or, what I just had happen, extend the wrong "foundation" (you need a "foundation" for each floor)). This "minor" bit makes it so frustrating to unplayable (combined with the abysmal "undo" that is very limited and is only one level deep). So, nothing minor about it. I like the idea, the concept, the realism… but the actual implementation, as said, is still woefully lacking. Cannot recommend at this stage.
