I'll be submitting a bid on repair of this raised patio. All the stairs need to be rebuilt and the raised section needs some work. My estimate is to PW all stones and rebuild most of the wall since one side sank nearly 8" from some drainage issues. Customer thinks its because the house was new construction. I'm betting it was their gutters were clogged and the water kept washing out the base on both corners... there really isn't a spceific grade currently. After rebuilding the wall I'll reset the whole top patio graded to a drain up top that will run to street. Rebuild all stairs and do a polysand to finish off. I'm coming in with a rough bid of about $3750.