“It’s generally about the same price range for the average tub or shower replacement. If you’re replacing a tub with a tub or a shower with a shower and aren’t adding new features, the typical cost is about $3,000 to $5,000. This is when people want a new tub or shower environment, generally for a facelift.”.f you’re wondering how much you should expect to pay to replace an old tub or shower, the short answer is: anywhere from about $1,500 to $5,000, with the national average running about $3,000.