I'm modeling a property; it has a ground floor level, 1st floor level, and top level which is a flat roof / solarium.

The level of the ground floor is elevated 1.5m from the pavement/garden.

I'd like to place steps to the front and back doors.

I've tried to drop the steps to -150m elevation, but that didn't work as the elevation wont go lower than 0.

I've tried adding a level, but I can't see/find how to move/place the lower level before the ground floor.

Just wondering if anyone would know a workaround, or should I start afresh?

Thanks for any help [:)]