Many people renovate beautifully but forget to plan for hot water. After finishing, they realize the heater is too small or there was no space left to install one. Changing things at that stage means breaking tiles again.
During renovation, decide:
type of heater (instant or storage)
capacity needed for your household
safe location for installation
wiring or gas connection requirements
Hot water planning affects pipe routing and electrical layout, so it must be discussed early. A bathroom renovation feels complete only when the shower is both beautiful and comfortable to use.