Whether he is aware of any under-utilised properties owned by his department; if not, what is the position in this regard; if so, what is the (a) address of, (b) value of, (c) amount of rates and taxes paid on and (d) amount spent on maintenance on each property (i) in the (aa) 2014-15, (bb) 2015-16 and (cc) 2016-17 financial years and (ii) since 1 April 2017?