If I remember correctly there are 13 posts now, all about 3' deep. Before we finished the framing a trenched a gray water french drain from the kids bathtub to help my trees. 2 kids a bath a night, 300 gallons a week I was giving back to city! After framing but before decking I put down 12x 3cuft bags o aromatic cedar under the deck for our dogs' favorite spot. I plumbed natural gas to my BBQ and my fireplace. For the fireplace I made a log lighter from 1/2" gas pipe with 4x 1/8" orifices drilled. It can be turned up to a roaring fire, but the heat really goes right up the chimney. Reclaimed/ used materials, my glass panels are old shower stall doors, 2 were on the original deck, 3rd came across tearing down another house. Fireplace liner, curtain, log rack, gas valve I lucked out finding on another teardown.