That’s not a half sphere. Pure half sphere structures are extremely rare as they waste a lot of space and building materials. Your better off using more than half a sphere so the walls curve in slightly at the base. You get more useable internal volume from a slightly smaller exterior footprint and use less building materials. The next obvious improvement is to use a dome on top of a cylinder which again improves useable space over a half sphere and is a fairly common design as seen with silos and observatories etc.

The only way a half sphere works out well is if your dealing with some form of pressure dome. Either using internal pressure to support weight, or in the case of a building underwater/Moon/Mars dealing with very high pressure differences.