Revisions log for Answer #3147

First of all, you should contract a geotechnical survey to determine where the solid layer is. Then consider how to address the roughness, if with a basement, if with retaining walls, if with both, using terraces.

Depending on the design and foundation layer, there can be a lot of ground movement. But technically it can be built, it will of course be more expensive than flat ground.

My advice is to hire a technician.