What a Tub-to-Shower Conversion Really Costs in Miami, Line by Line
The Numbers Online Do Not Agree With Each Other
Search this topic and you will find a Miami average around $1,491 to $2,278, with a low end near $311. You will also find a national average near $3,000, a range of $1,500 to $15,000, and South Florida tile builds quoted at $12,000 to $25,000.
That is a seventy-fold spread on the same three words. It is not because anyone is lying. It is because those numbers describe different scopes, and almost none of them say which.
Our published range for a tiled tub-to-shower conversion in Miami-Dade is $4,500 to $12,000. Below is what actually sits inside that number, item by item, so you can check any quote against it.
The Line Items
These are working ranges for a standard alcove conversion in Miami-Dade. Your bathroom will not hit the middle of every line.
Protection, demolition, tub removal, and haul-away: $450 to $1,200.
Floor and hallway protection, removing the tub and surround, and getting the debris off your property. A cast iron tub costs more here than an acrylic one because it has to be cut apart to get it out of the room.
Plumbing adjustment: $350 to $2,400.
A tub drain is 1.5 inches and a shower drain is 2 inches, so some plumbing work happens on every conversion. Keeping the drain near its current location sits at the bottom of this range. Relocating it in a slab home, which means opening concrete, changing the line, and patching, drives it to the top.
Framing and substrate repair: $0 to $900.
Zero if the wall is sound. This is the line that appears after demolition, not before, which is why your scope needs to say in writing what happens if damage is found.
Cement backer board: $250 to $700.
The substrate the waterproofing goes onto. Backer board is not a water barrier by itself, and anyone who tells you it is has told you something important about their work.
Waterproofing membrane: $350 to $1,100.
The layer that decides whether this shower lasts. Applied over the board and worked into every corner, seam, and change of plane.
Shower pan construction: $450 to $1,400.
Built and sloped on site to drain correctly. A prefabricated base costs less and is a legitimate choice, but it fixes your size and your curb height.
Tile material: $350 to $2,500.
Standard porcelain at the bottom. Large format, mosaics, trim pieces, and imported material at the top. This is the line you control most directly.
Tile labor: $1,100 to $3,200.
Driven by layout complexity more than by square footage. A straight-set field tile is fast. A herringbone pattern, a mitered outside corner, a niche with trim, and a bench all add hours.
Grout, trim, and sealing: $180 to $600.
Fixtures: $220 to $1,200.
Valve trim, shower head, handheld on a slide bar, grab bars. Grab bars need blocking installed behind the wall on day two, so decide about them early even if you install them later.
Glass: $550 to $3,500.
A fixed panel is the low end. A frameless custom enclosure with a door is the high end. Glass is templated after tile is finished, then fabricated, which is commonly one to two weeks.
Permit and inspections: $200 to $600.
A conversion touches plumbing, so it needs a permit in Miami-Dade even under HB 803. The full explanation is in do you need a permit to convert a tub to a shower.
Final cleanup and water test: $150 to $400.
Why the Columns Do Not Simply Add Up
Add the low column and you land near $4,600, which is why our published floor is $4,500.
Do not add the high column. It comes to nearly $20,000, and no real project hits the top of every line at once. A homeowner who relocates the drain through a slab is usually not also buying imported mosaic and a frameless enclosure. The high end of a real Miami conversion lands around $12,000 because expensive choices cluster in two or three lines, not thirteen.
That is the honest way to read any itemized estimate. Look at which lines are at the top of their range and ask whether those are the lines you care about.
What the Cheap Numbers Actually Cover
A $311 tub-to-shower conversion is not a shower. Neither is $1,491. Once you have read the list above, it is obvious why. Those figures come from cost aggregators that average a wide mix of jobs, including partial labor tasks. They typically describe one or two of these:
- Removing a tub with no replacement work included
- Installing a prefabricated insert into an alcove that is already prepared
- A refinishing or reglazing job on an existing tub
- A labor-only quote where the homeowner supplies every material
- A tub cut, which is a section removed from the tub wall for easier entry, not a conversion
None of those include a pan, waterproofing, tile, glass, permits, or disposal. If a quote you receive is anywhere near those numbers, do not assume you found a deal. Assume the scope is different, and go find out which lines are missing.
Three Tiers of the Same Project
The most useful thing you can ask for is three prices for the same scope. Here is roughly how they separate:
Standard, about $4,500 to $6,500. Same footprint. Drain stays put. Standard porcelain, straight set. Fixed glass panel. One niche. Sound walls.
Upgraded, about $6,500 to $9,000. Same footprint. Large format tile or a modest accent. Bench or a larger niche. Better fixtures. Frameless panel with a door. Some framing repair budgeted.
Custom, about $9,000 to $12,000. Widened opening or low curb. Linear drain. Full-height tile with pattern work. Frameless enclosure. Handheld, grab bars, and integrated storage.
The Cost Drivers Worth Knowing Before You Choose Anything
The drain is the biggest single variable. Keeping it near where it is can be the difference between the standard tier and the custom tier all by itself, because most Miami homes sit on concrete slabs. Ask about this on the first visit.
Tile layout costs more than tile price. People budget for the tile and forget the labor multiplier that comes with a pattern. If the budget is tight, buy nicer tile and set it straight rather than cheaper tile in a complicated layout.
Glass is the easiest line to move. Going from a frameless enclosure to a fixed panel can save a four-figure sum and often works better in a small bathroom anyway.
Hidden damage is real and it is not a sales tactic. In homes built before 1990 we find water damage behind the old surround often enough that we budget for it. What matters is that your scope says what happens when it appears.
How to Compare Two Estimates Properly
Do not compare the totals. Line them up and check for these thirteen items. Then ask three questions:
An estimate that answers those three is worth more than an estimate that is $800 cheaper and answers none of them.
Get a Number for Your Bathroom
Ranges are for planning. A real number needs your ZIP code, your tub size and material, your drain location, and whether you want a door, a panel, a bench, a niche, or a low entry.
The tub-to-shower conversion estimate form asks for exactly those and returns a starting price before anyone comes to measure. For the deeper version of this breakdown, see the tub-to-shower conversion cost guide. If you are still deciding between a tiled build and a panel system, start with acrylic panels vs a tiled conversion.
Frequently Asked Questions
Why is your low end $4,500 when websites list Miami averages under $2,300?
Because those averages are not describing a finished tiled shower. Cost aggregators pool a wide mix of jobs under one label, including tub removals with no replacement, prefabricated insert installations into prepared alcoves, tub reglazing, tub cuts, and labor-only quotes where the homeowner buys all the material. Average those together and you get a number in the low thousands that does not correspond to any complete project. A finished tiled conversion has to include demolition and haul-away, plumbing adjustment for the drain size change, backer board, a waterproofing membrane, a sloped pan, tile and tile labor, grout, fixtures, glass, a permit, and a final water test. Add the realistic floor of each of those and you land near $4,600. That is arithmetic, not positioning.
What is the single fastest way to lower the price without regretting it?
Keep the drain where it is and simplify the glass. Those two decisions move more money than any tile choice, and neither one shows up as a compromise in daily use. Drain relocation in a slab home means opening concrete, rerouting the line, patching, and rebuilding the floor, which can add well over a thousand dollars on its own. Custom frameless enclosures are the other large line, and in a small Miami bathroom a single fixed panel often performs better anyway because it leaves the room feeling open and gives you less hardware to clean. What we would not cut is waterproofing, the pan build, or the permit. Those are the three items where saving money now reliably costs more later, and all three are invisible once the tile is on.
Does a tub-to-shower conversion have a cost per square foot I can use?
Not usefully, and be careful with anyone who quotes one. A conversion is dominated by fixed costs that do not scale with area. Demolition, drain work, the pan build, the permit, and the glass cost roughly the same in a 30 square foot alcove as they do in a 40 square foot one. Only tile material and part of the tile labor track square footage. That means a cost-per-square-foot figure derived from a large custom shower will badly overprice a standard alcove, and one derived from a simple job will badly underprice anything with a bench, a curbless entry, or a relocated drain. Ask for the itemized breakdown instead. It takes two extra minutes to read and it tells you something a single multiplier never can.
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