To redevelop Bathrooms is a long and tedious process with many things to be accomplished. There are many facets of the project that must be taken into account before one can start. One has to design the new bathroom, figure in the cost of the materials and labour charges if any, the availability of the materials. One needs to prioritize which areas of the bathroom should be redeveloped and then begin.
An important aspect is underfloor heating which may be a necessity if one stays in cold conditions. Otherwise people will end having to take a bath in cold conditions. Underfloor heating is available in many different systems, but most of them entail that your floor be dug up and then redone which is not feasible if the flooring is marble or solid stone. A preferred method is to use under floor heating which can be placed on top of the floor and heat the floors.
An important thing which is required for really cold areas is a bathroom radiator so that one can control the temperature of the bathrooms.
Another aspect that one should look at is shower enclosures which is essential to ensure the privacy of the people taking baths. It is considered a major necessity now.