Cost depends on the type of bathroom furniture and fittings that you select... Replaced bathroom approx 4yrs back and cost approx 4k.
Bath (whirlpool), sink, toilet - 1400 euro. Tiles 800, Plumber 600, Bath Panel 50 euro (Stainless from local workshop). Paint 100, Tiling labour (free as done it myself). Taps (500 euro - expensive but cool). Paint 100, Blind 100, Electrician (for whirlpool bath power supply). Other misc expenses like grout, adhesive, toilet seat, bathroom presses etc.. made up the remainder of the cost.. As above very much dependent on the the furniture and fittings you select