What are the differences between quantity surveying and building surveying?
By “quantity surveying” I assume you are referring to surveys performed to compute the volume of some material such as sand, coal, rock, etc. “Building surveying” could cover a wide range of activities, depending on what you are building. The best short to your question is “accuracy”. Volume surveys don’t need to be exact – no one really worries if there are 4,000 CYD or 4,100 CYD of sand. However, when the steel beams arrive at the construction site, the bolts in the concrete foundation better fit into the holes on the beam.