On a low tide, the river house pier is high and dry and on a normal tide, it’s around 18” deep. You can see where it drops off in the picture of the neighboring piers. We need to come out around 16 to 20 feet which would require 4 to 6 pilings. In talking with the neighbors they are saying around $1600 each. That sounds really high to me. I can do all the framing and decking myself, just need pilings put in.