We have taken ownership of my wife's late father's apartment which was built maybe 30 years ago. The workmanship is non existent, and tiles are held in place by adhesive tape, there's electrical conduit on the surface, and water pipes also on the surface. Someone even destroyed the bulkhead above to replace the hot water cylinder for the shower 2 years ago. The major redeeming features of this apartment is that it's the only building with base isolation in the city，it's very central, and that was designed by my wife's father.
I want to renovate clearly, so is it even possible to retile in situ, or do I need to strip it down to the original concrete shell? And how do I hide all the pipe and electrical work?