Active job

retaining wall

I have dug out an area for my garage and need to retain the soil for when get the garage built. The shape is sides of a square 2sides and a back, The inside diminsions are 2sides 7metres in length by 2metres in height and the back wall 7metres in width by 2metres in height. Would like in done in just plain concrete I dont have a design, just after a rough price as I'm checkin out options.