A Building Permit is required for the construction of a retaining wall or structure greater than 1.5 meters in height.

A Registered Professional shall undertake the design and conduct field reviews of the construction of a retaining structure greater than 1.5 meters in height.  Sealed copies of the design plan and field review by means of Letters of Assurance in the form of Schedules B-1, B-2, and C-B referred to in Section 2.6 of Part 2 of the Building Code for all retaining Structures greater than 1.5 meters in height shall be submitted to a Building Official prior to the issuance of a permit.