Why Homeowners Convert a Tub to a Shower
Tub-to-shower conversions are one of the most requested bathroom projects in Florida, driven by two very different groups of homeowners: those wanting a more modern, spa-like walk-in shower (especially in a primary bathroom that no longer needs a tub because there's a second tub elsewhere in the house), and those planning to age in place, where a step-in shower removes a fall hazard that a high tub wall creates. Both groups end up with a similar project — but the finish level, and therefore the cost, varies widely.
| Scope | Florida Range | What's Included |
|---|---|---|
| Prefab Shower Conversion | $3,500–$6,500 | Demo tub, install one-piece or multi-piece acrylic/fiberglass shower surround, new shower valve, glass or curtain enclosure |
| Mid-Range Tiled Conversion | $6,500–$10,000 | Demo tub, waterproofing membrane, tiled shower pan and walls to 6ft, glass door, niche, new fixtures |
| Custom Tiled Conversion | $10,000–$14,000 | Full-height custom tile, frameless glass enclosure, built-in bench or niche, rain shower head, premium waterproofing system |
| Barrier-Free / Aging-in-Place | $8,000–$16,000 | Zero-threshold curbless entry (requires slab modification), grab bars, bench seat, non-slip tile, wider door opening if needed |
Florida Building Code and Waterproofing
Every tub-to-shower conversion in Florida that involves tile falls under Florida Building Code Section R702.4, requiring a waterproofing membrane inspection before tile can be installed. This applies whether you're doing a full custom tile shower or a simpler tiled conversion — the inspection cannot be skipped, and skipping it creates the exact conditions (hidden leaks, subfloor rot) that lead to expensive repairs 2-3 years down the road.
Prefab acrylic or fiberglass shower surrounds do not require the same tile waterproofing inspection since they're a sealed single unit — one reason prefab conversions are faster to complete (often 2-4 days vs. 5-10 days for a tiled conversion) and lower cost.
The Curbless / Barrier-Free Conversion
A zero-threshold, curbless shower entry — increasingly requested for aging-in-place and universal design — requires lowering the shower floor area relative to the surrounding bathroom floor, which on a Florida slab means cutting concrete to create the drop needed for proper drainage slope. This is the single biggest cost driver in a tub-to-shower conversion:
- Slab modification for curbless entry: $2,000–$5,000 additional, depending on drain relocation needs
- Linear drain system (common for curbless): $600–$1,800 for the drain component alone
- Wider door opening (if needed for wheelchair access): $800–$2,500 depending on whether it's load-bearing
The detail that gets missed most often in tub-to-shower conversion quotes is the plumbing valve height and rough-in location. Older Florida homes (built before the mid-1990s) often have tub/shower valves positioned for a tub-shower combo, which sits at a different height and position than what a walk-in shower design calls for. Moving the valve means opening the wall and often means the valve trim kit style has to change too — sometimes $400-$900 that isn't in the initial "just convert my tub" quote. We check the existing rough-in before quoting, not after we've opened the wall.
Permit Requirements
A tub-to-shower conversion requires a permit in Florida when it involves plumbing changes (valve relocation, drain relocation for curbless designs) or any structural modification (door widening, wall removal). A straightforward tub-out/shower-in conversion using the existing plumbing rough-in location may not require a permit in some jurisdictions, but the waterproofing inspection requirement still applies to any tiled installation regardless of permit status.
How to Get an Accurate Conversion Quote
An accurate quote requires seeing your current tub/shower valve position, bathroom dimensions, and whether you want a curbless design. D&Co provides a written, itemized quote within 48 hours of a site visit — shower type, waterproofing scope, valve work, and any slab modification broken out separately.