First, you would need to get one of these mobile cranes and set it up in middle of a street in the neighborhood below your house that is accessible by dump trucks (but inconveniently blocking traffic).
Then you would pull up a truck with the fill material in the back and scoop some up in the bucket on the end of your crane.
.
And then lift the bucket high up and over the other buildings
And then lower the bucket down to your waiting crew in the backyard
And then repeat this again and again and again. You would think there would be an easier way, but this is how it is done in old town Bern.






