It is unfortunate that the building companies make more money by not building, than by building.

We need a progressive land/council tax. Hording land should cost you.

My favourite suggestion should be that tax levels are based upon a heat map of urban density, but also linked to area owned. It came out of the US because they have problems with land hording in urban area, spaces that are just a car park to act as a holding for land.

It would mean that ownership of inner city, undeveloped land and also owning large estates is penalised.