How much does it cost to replace your bathtub with a shower? Typically, it ranges from $6,000 to $16,000. Bathtubs are falling out of style and being replaced with luxury showers. Specifically, Many homeowners now just view these large bathtubs as a waste of space that could be used for other things such as spa showers, additional high-end finishes, and sitting areas. Complex work and various factors give the project a wide range of pricing. Several factors play a role in determining a project’s total cost, including labor costs, material costs, and room configuration.