A standard alcove bathtub occupies roughly thirty by sixty inches, which is about fifteen square feet of a bathroom that may only total forty. In a small bathroom, the tub is not a fixture, it is the dominant object in the room, and it is worth asking honestly what you are getting for that space.

The question nobody asks first

Do you take baths? Actually take them, not in principle.

Most people we ask say no, or perhaps twice a year. What they have is a bathtub used exclusively as a shower base, which means they are spending fifteen square feet and accepting a fifteen-inch step-over in exchange for a capability they do not use.

The resale objection is worth addressing directly, because it is the usual reason people hesitate. The conventional wisdom is that a home should retain one tub for families with small children. That is reasonable advice if this is the only bathroom in the house. If you have a second full bath with a tub in it, or if the property is a condo aimed at a demographic that overwhelmingly prefers a walk-in shower, which describes a great deal of Delray Beach and Boca Raton, converting the primary bathroom is generally the value-adding move rather than the value-destroying one.

The dimensions you need

The good news is that a tub alcove is almost always large enough for a comfortable shower.

  • Thirty by sixty inches is the standard tub footprint, and it makes a genuinely spacious shower. Considerably more generous than many purpose-built showers.
  • Thirty-six by thirty-six inches is the ADA transfer shower dimension and is comfortable for most people.
  • Thirty by thirty inches is workable but tight. Acceptable in a powder-room conversion, not ideal as a primary.
  • Thirty by sixty inches with a low threshold is also the ADA roll-in dimension, which means a standard tub alcove can become a fully accessible shower without moving a single wall.

That last point is the one that surprises people. You do not need to expand a small bathroom to get an accessible shower. The tub footprint is already the right size.

What makes a compact bathroom feel larger

The space gain is partly real and mostly perceptual, and the perceptual part is where the design decisions matter.

Remove the visual break at the tub line. A tub creates a hard horizontal line at knee height that chops the room in two. A shower wall running from floor to ceiling reads as a single continuous surface, and the room reads taller.

Take the panels to the ceiling. Stopping the surround at seven feet and leaving painted wall above it draws a line that shortens the room. Running the surface all the way up is one of the cheapest and most effective moves available.

Choose glass over a curtain, if it suits the user. A clear glass panel lets the eye travel the full depth of the room, which is the single largest perceptual gain available. A curtain is an opaque wall at the halfway point. This trades against ease of access, which is covered in our guide on doors versus curtains, so it is a genuine decision rather than an obvious one.

Use larger-scale panel patterns, not smaller. Counterintuitive, but small busy patterns emphasize how little surface there is. A large-scale book-matched veining pattern reads as a single slab and makes the wall feel more expansive.

Continue the same flooring into the shower where possible. An unbroken floor plane makes the room read as one space rather than two.

Recess the storage. In a compact shower, a protruding caddy or corner shelf is both a physical and visual obstruction. A recessed niche gives you the storage without consuming any of the space you just gained.

Practical notes on the conversion

Two things are worth knowing before you plan. Plumbing is straightforward, because the shower valve is repositioned to standing height and the tub waste is adapted to a shower drain, all within the existing wet wall, so no plumbing is relocated across the room. And a fully curbless entry depends on the floor structure, since the drain needs fall. In many condos a low threshold of an inch or two is achievable where a fully flush entry is not, and Michael will tell you which applies to your bathroom at the free measure rather than after the tub is out.