Trade the tub for a walk-in shower
In most small hall baths, the biggest gain comes from pulling out a tub nobody uses and building a tiled shower in its place. Keeping the shower where the tub was lets the drain move a short distance instead of across the room. Clear glass in place of a curtain lets your eye reach the back wall, and the room reads larger the moment you open the door.
Florida code sets a floor for shower size: 900 sq in, with no side under 30 in. Drain options and entry widths are on our walk-in shower sizes and drains page.
A wall-hung vanity frees the floor
Mounting the cabinet on the wall leaves tile visible underneath, and a bathroom with more floor showing feels bigger even though the square footage has not changed. Before the board goes up we add solid blocking inside the wall, since a floating cabinet with a stone top is heavy and has to hang from something better than drywall.
For a hall bath, a 30 in vanity is often the right width. Drawers work better than doors in a tight room, because a door swings into your knees and a drawer comes straight out.
Large-format tile, fewer grout lines
Porcelain with at least one side of 15 in or more counts as large format, and fewer grout lines make a small floor look calmer. Big pieces are less forgiving. They need a flat substrate and mortar coverage close to 95 % in wet areas, so we back-trowel every large tile before setting it.
A niche instead of a shower caddy
Shelves recessed into the wall give back the inches a hanging caddy or a corner shelf would take from the shower. We frame the niche between studs, wrap it in the same membrane as the rest of the stall and pitch its bottom a little so water runs out.
Sliding door or a fixed glass panel
A swinging shower door needs open floor in front of it, and a small bathroom rarely has that floor to give. Two layouts avoid the problem. A sliding glass door stays inside its own track, and a single fixed panel with an open end needs no door at all. A frameless door or panel from us is $1,650 installed.
Light and air in a room this size
A bathroom without a window still needs a way to get rid of steam. The code calls for a window of at least 3 sq ft, half of it operable, or an exhaust fan of 50 cfm (20 cfm when it runs nonstop) ducted to the outside. Venting into the attic does not count. In a closed Miami hall bath, steam with nowhere to go ends up on the ceiling paint and in the grout.
For light, a lit mirror over the vanity plus one ceiling fixture near the shower usually covers a room of 40 sq ft.
Clearances that keep a small bath usable
Small rooms fail when the toilet ends up jammed against the vanity, and the code puts numbers on that. The toilet centerline has to sit at least 15 in from any wall, partition or vanity, two fixtures need 30 in between their centers, and you need 21 in clear in front of the bowl. In a room 5 ft wide, a toilet centered 15 in off one wall leaves room for a 30 in vanity beside it, with nothing to spare.
Small condo bathrooms
Condo baths add a limit a house does not have, because the drains run through a concrete slab. Moving the toilet or the shower drain needs the association's written approval, an engineer's review and a scan of the slab before anyone cores it. The paperwork and building rules are in how condo bathroom jobs work, and a full condo bathroom from us is $22,900 per bathroom.
In a house, most small hall baths fall under our guest bathroom remodel price of $19,900 per bathroom for rooms up to about 50 sq ft.
Frequently asked questions
What makes a small bathroom look bigger?
Glass instead of a shower curtain, the same tile on floor and walls, and a vanity that leaves the floor visible. Each one lets you see more of the room at once.
How much space does a toilet need?
At least 15 in from the centerline of the toilet to the nearest wall or vanity on each side, and 21 in of clear floor in front. That works out to a 30 in wide space as a minimum.
Can large tile go on a small bathroom floor?
Yes. Pieces of 24 in or more work on a small floor as long as the subfloor is flat and the mortar covers the back fully. Inside the shower, where the floor slopes to a center drain, we often step down to smaller pieces so the tile follows the pitch.
Does a small bathroom with a window still need a fan?
The code accepts a window of at least 3 sq ft, half of it opening, in place of a fan. In Miami we still recommend a fan ducted outside, since few people open the window after every shower in August.
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