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Bathroom cost comparison · model 2026.1
Tub-to-Shower Conversion vs. Shower Replacement Cost
Evidence note: these are editorial planning comparisons, not observed contractor-bid averages. Project allowances are not necessarily outputs of the calculator formula; compare the defined scope and obtain local written quotes.
A tub-to-shower conversion commonly needs a $6,500–$16,000 planning allowance, while replacing an existing shower commonly needs $4,500–$15,000. The ranges overlap because waterproofing, tile, glass, and concealed repairs matter more than the name of the project.
| Option | Planning cost | Typical duration | Best fit | Main cost drivers |
|---|---|---|---|---|
| Tub-to-shower conversion | $6,500–$16,000 | 1–3 weeks | Removing an existing bathtub to improve shower access or usable standing space | Tub demolition, drain and valve changes, shower base, waterproofing, wall finish, enclosure |
| Existing shower replacement | $4,500–$15,000 | 1–3 weeks | Replacing a worn or failed shower while retaining the established wet-area footprint | Demolition, substrate repair, waterproofing, tile or surround, plumbing trim, glass |
Why the costs overlap
Both projects require a complete water-management assembly rather than a surface covering alone. Once demolition exposes damaged framing, failed substrate, an unsuitable drain, or an old valve, the corrective scope can outweigh the original fixture difference.
Choose by scope, not by headline price
A direct shower replacement is usually more predictable when the base, drain, valve, and enclosure dimensions remain similar. A tub conversion can require drain modification, wall infill, a different valve height, and decisions about threshold height and glass.
- Confirm whether the drain moves or changes size
- Name the waterproofing system and substrate
- Separate stock enclosure from custom glass
- State whether concealed repair is an allowance or change order
- Check whether another bathtub remains in the home
Quote comparison rule
Ask bidders to price the same base or pan, waterproofing, wall area, tile allowance, plumbing work, glass allowance, demolition, disposal, permits, and repair assumptions. A lower proposal is not comparable if it excludes the enclosure or substrate preparation.
Sources and model basis
These sources inform the national model and technical context. The project ranges are RenoCostData editorial planning allowances; they are not all generated by the calculator formula and are not prices quoted by the source organizations.