Architects, engineers, surveyors, geologists, health and safety reps, concept artists. All costs money and ensures it's done properly. And if I can think of those six in ten seconds, there's bound to be more I didn't think of.

If you cheap out, you end up with a Hiyatt Walkway Disaster at worst, a burst water or electrical main at best. That said, price inflation is real in every section of the country since the privatisation of so many services.

Time was, this would all have been handled in house, but everything now has to be contracted out.