I am thinking of putting a deck on the back of the house and am looking for some input. I will be doing it myself (no decking experience) but will have several family members who know what they are doing help me out!

right now I have a 10x10 slab off the back of the house. It is poured right next to the foundation. On top of that right at the sliding glass door is a small 3x3 roughly slab poured as a step. It is 7" tall. I have 6" from the top of that to the bottom of the door.

I only want the deck to go out the 10' away from the house. Along the house I have an addition 6' to the south and 8'4" to the edge of the house to the north.

i don't have to go to the south and would be happy with a deck that is 18'4"x10'. Then I wouldnt have to move as many sprinklers and makes my life a little easier.

So, I'm looking for ideas and insight as to what the best decking material is, what kind of cost I am looking at, if I need to pour more cement for the framework or another slab.