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Assess whether the wall supports excavation

Retaining wall supporting excavation

Retaining walls that support excavation have different constraints to walls that support a filling.


Does the wall support excavation?

  • If yesgo to the next step.
  • If no, you do not need a Building Permit. As long as there are no planning restrictions, you can proceed to construct a wall that supports a filling.  You may now exit this guide.