There are different extents of remodeling. For example, you can shine the tiling while painting the ceiling or you can demolish the old bathroom, get new tiles and new bathroom fixtures. The extent of the remodeling process depends mainly on the budget and secondary on the reason behind the remodeling. If you have money to spare, then you should change the entire bathroom and get a new one with new fixtures and tiling. On the other hand, if you are on a tight budget, you will need to calculate things carefully to find out what you can and what you cannot afford. As for the reason, if you are planning to sell the house, remodeling it by changing the tiles and painting the ceiling and refurbishing the fixtures is enough. On the other hand, if you want to redesign the bathroom, then fully remodeling it would be the correct course of action. So study the different available options so you can make the most suitable choice for your bathroom.