Clear the area where the retaining wall is going to be installed.
Level the ground around the retaining wall with at least 300mm clear/cut behind the proposed retaining wall to allow adequate space for all required drainage materials – agi pipe, geo fabric and drainage aggregate (these will be installed later).

If you are installing a retaining wall close to any solid structure (eg. house, water tank, anything concreted into the ground), the retaining wall will usually need to be located at least 1.5 times the distance away from the wall height. It is in these circumstances or if you are unsure to contact an engineer for clarification.