BATHROOM
How to Estimate a Bathtub Replacement
Contractor method for estimating bathtub replacement: type, material, access and wall repair.
Bathtub replacement bids fail on access and wall repair. The tub is a known price; the drywall, the tile and the tight hallway are where the quote grows.
THE SHORT ANSWER
How do you estimate a bathtub replacement?
Confirm the tub type (standard $1,000, walk-in $5,500, whirlpool $3,500), check hallway access and plumbing relocation, then price wall repair and disposal. A standard install runs $3,000-$5,000.
Confirm the tub type
This model uses equipment allowances of ~$1,000 for standard, ~$5,500 for walk-in and ~$3,500 for whirlpool tubs. Some walk-in models need more hot-water capacity, faster drainage or electrical work; verify exact specifications before quoting.
Check access and plumbing
Measure doorways and hallways — a tub that fits the room but not the hallway is a wall-opening job. Relocating the drain or faucet adds $1,000-$2,000.
Price wall repair and disposal
Removing the old tub often opens the surround. Use $1,500-$2,500 as a planning allowance for wall and tile repair, then inspect waterproofing, substrate and hidden water damage. Disposal adds ~$200. Use the Bathtub Replacement Cost Calculator to build the full quote.
Check the total
Replace every calculator allowance with the selected tub, plumbing and repair quotes before markup. Account for electrical, drain and water-heater changes required by the exact model.