What restrictions apply for building retaining walls?

Single Wall Systems

  1. A retaining wall exceeding 1.2 metres (4 feet) in height will require a building permit and shall be designed by a professional engineer. 
  2. A retaining wall is not permitted to exceed 2.4 metres (8 feet) in height under any circumstances. 
  3. Walls exceeding 0.6 metres (2 feet ) in height should have a guard or fence installed on top of it.

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