En-Suite tiling/condensation

I am currently having an en-suite bathroom installed in my house and am wondering whether I should tile the entire room or just the shower cubicle and splash back? We are worried that having a fully tiled room will generate lots of condensation. We aren't having an extractor fan installed but are having a window and towel radiator. Having never had such a small bathroom before I'm not sure what to do. Any advice greatly appreciated.