I would disregard anyone who answered this. Clearly they didn’t do it right.

Three levels below ground...

Seriously, people have survived falling over 33,000 feet. No building is tall enough to 100% guarantee death.

If you fell from 48 feet (about 4 stories), statistically you have about a 50% chance of survival.

At 84 feet (or 7 stories), the mortality rate is 90%.

I don’t know & don’t want to try to figure it out.
I did know of a guy I went to school with who jumped out a 6th floor window, broke both legs but survived....so I’d think you’d have to go higher than that.

You can survive incredible heights if you fall right, I do not know the typical height for pavement

Anything over 10 stories should do it. Hope you aren't asking for yourself.

It only takes one floor if the base is filled with pointy shards of steal to impale the person who decides to go all out ... no need to go up so high tbh

20 floors

Basement

10 should do it

The roof top, but I know you're just asking out of curiosity to be silly. Right? 👀

Death to your consciousness or physical death?

First floor for instant death, just run and flip and land on your neck. If you jump from higher, there will be time to go AAAAAHHHH! on the way down. If you jump from really high, you'll have to take a breath to resume screaming, presumably.

There are no guarantees in life. Warranties yes, but no guarantees.