There are tons of tutorials online, just google CFE cheat, and if you find it too difficult, you can always ask one of the request teams or even me to construct it for you. It also has the decking halfway up the back of the house, but I don't have a pic of that.
( constrainfloorelevation true/false) You'll also need to use the cheat for the bi-levels on the main floor. For that alone you need to learn the CFE cheat. You can easily attach garages to your foundation homes when you're building a house in Sims 3 You'll need to open up the cheat editor first, but you only need to enter a few commands to make the garage work with the rest of the house. It too has a ground floor entrance,and from there a half flight of stairs go up to the main floor living area and a half flight AND a full flight go to the basement below. I built a re-creation of a real-world home that had the same thing, and this is the closest I could get: If you do build it, the ground will always have a one square gap between the wall and the ground, so essentially you'll have a ditch all around the house. What you're looking to build is where the basement is partly above ground and functions as the foundation.