I am demolishing the old outdoor steps at the rear of my house, built circa 1955. I have discovered that they are not constructed on the ground surface, but sit upon a concrete block structure about 4 feet deep. Underneath the steps is an empty, 4-foot deep pit.
I plan to have a concrete patio surface poured over the area.
Can I demolish the steps into the empty pit, essentially filling with the demo material? Or will the broken concrete and blocks be too unstable a base to build upon later?