Hello Community,
I am a first-home owner and wish to renovate the backyard of property I bought. The patio has concrete slab, attached to the house wall, and is split due to some reason, probably soil erosion. I am not sure whether I should get rid of the retaining wall (shown in picture) which adds to aesthetics but leaves very small area for any seating arrangement. If I get rid of it then height from the door to the ground level increases too much. The ventilation holes of the sub-floor area ( visible in the picture) is a few centimetres above the concrete slab. So, seeking thoughts on how can I go about renovating it ? thank you. 
