The dimensions of the shed measured by the Council in September are as follows:
Length 22.254m
Width 13.1m
Height at end facing River Drive 15.5m (over 50ft)
Height at end facing river 18m

The height of of structure as given by Paul Kelly in the Gazette in September and repeated 01-Apr-2014: 11m (36ft).

The authorised planned height at the road end is 12.5m(41ft)
This is taken from the elevation of river end of plans submitted by the agents for Tyne Docks at about the same time, September 2013, which give at the river end:
width 12.2m and height 15.5m