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Boundary retaining wall and new fence

Hi there, I am looking for a quote to push my exisiting fence back about a metre or so so it sits on the boundary line (The previous owners moved it in to fit a vehicle on the other side of the fence). Currently it is just a fence but I am thinking it would make more sense to have a small height retaining wall and then the fence on top of it. I have the site map which shows the measurements for where the boundary line is, as well as aerial shots. The boundary does border a right of way and there is a water pipe that sits on the other side of the boundary line. Open to ideas and suggestions as to the best way to go about doing it. It would be approx 5.65m across the front bit and then 7.5m down the driveway side.