how much does renovating a bathroom cost
1 According to an annual construction cost survey by Remodeling Magazine, a mid-range remodel of a 5x7-foot bathroom averages $14,109-$18,864; for an upscale expansion of a 5x7 bathroom to 9x9-feet within the existing house footprint, costs run $46,865-$59,456.e had to gut out all of the old fixtures and we extended the bathroom out 2 feet into the walk in closet. We purchased a Rinnai water heater for about $1,200, bought a large oval deep bathtub and had a friend jet it, total cost about $700. The big cost was tiling everything with ornate tile.