So does this slab run up to the back door? If so , what’s the step down height from the door sill? That’s the most important aspect initially, as it often rules in or out the idea of a deck , and definitely how to go about it.
I’m currently building a low level deck at my place. The first half rolls over a covered concrete slab from the back door but then extends out into open ground. There’s a few ways to do it, but the final height is the first thing to determine.