Small Bathroom Remodel Ideas in Chicago

Small Chicago bathrooms are usually built around a single wall of plumbing, a 60-inch tub and a door that swings into the room. The best ideas for them rarely involve moving everything. They free floor space and light by changing the door, the vanity, the tub or shower, and the storage, while keeping the drain where it is. This guide walks through those options, the clearances to plan around, what tends to drive cost in a tiny room, and what to ask a licensed remodeler before you commit.

Updated October 22, 2026. Code values below come from the NKBA’s published guidelines, which cite the model plumbing code, and from Chicago’s ventilation table. Chicago has its own codes, so a licensed plumber and the permit review have the final word on your building.

Start with what the room already gives you

In many older Chicago bungalows, two-flats, greystones and condos, the bathroom is a small rectangle with the tub along one end and the toilet and sink on the long wall. That pattern follows from the tub: the standard alcove tub is about 60 inches long and 30 inches wide, and in many bathrooms it runs the full length of one wall (Angi; The Home Depot). Many such rooms also have no window and a door that cuts into the clear floor space. Read more about the age-related issues behind the walls in remodeling a bathroom in a vintage Chicago home.

Before choosing finishes, measure the room, mark where the drain, supply lines and vent stack are, and note which walls are exterior or shared. Every idea below is easier and cheaper when it works with that plumbing instead of against it.

Clearances to plan around

These are the model-code minimums the NKBA reproduces in its bath planning guidelines, with the NKBA’s own recommended values beside them. They are useful for judging whether an idea fits on paper. They are not a substitute for Chicago’s plumbing code or your permit review.

The 21-inch clearance in front of a toilet or sink is measured to any wall, fixture or door, and the plumbing code also says fixtures and piping must not interfere with the operation of doors or windows (American Society of Home Inspectors, quoting the International Residential Code). In a tiny bathroom, the door swing is often what decides whether a plan works.

Tub or walk-in shower

If the room fits a 60-inch tub and you use it, keeping it is the least disruptive option. If you do not, replacing it with a shower can open the room up and uses the same wall and, in many cases, the same drain location. The code minimum is a 30-by-30-inch shower, but the NKBA recommends at least 36 by 36 inches, so a shower in the footprint of a 60-by-30-inch tub leaves room for a bench, a niche or a wider entry. See tub-to-shower conversions and walk-in showers for how those projects work, and bathtub replacement if you want to keep a tub.

Two cautions. If anyone in the household needs a tub for bathing children, for soaking or for resale reasons, think about that before removing the only one. And a fully open walk-in without a door can spray into a small room; the NKBA notes that a shower at least 60 inches deep controls spray better, which is a reason to talk about glass or a return panel with your remodeler (Supply House Times, summarizing NKBA guidance).

Doors: swing out, slide or pocket

A door that swings into a small bathroom takes a quarter-circle of floor with it, and that arc often overlaps the clear space in front of the toilet or sink. Three common fixes:

• Swing the door outward if the hall or adjoining room can take it. This costs the least, but check that it does not block a hall, stairs or another door.
• Use a pocket door. It needs a wall cavity at least as wide as the door plus about 3 inches that is free of plumbing, ducts and standard electrical boxes, and fitting one into an existing wall usually means opening the wall (RELIABILT; PocketDoors.net). It also seals sound and light less tightly than a well-fitted hinged door. Bathrooms with the plumbing on the shared wall are poor candidates.
• Change the opening. The NKBA recommends a clear doorway of at least 32 inches, but accepts a 24-inch door where the structure prevents widening. Older bungalow and two-flat bathroom doors are often narrow, and changing a wall opening may need a carpenter to check what the wall carries.

A wall-hung vanity and smarter storage

A wall-hung vanity leaves the floor visible beneath it, which makes a small room feel larger and is easier to clean. It also changes the work behind the wall: it needs solid blocking between the studs to carry the cabinet, top and plumbing, and the drain and supply lines have to be roughed in at heights that suit the specific cabinet. If a slow leak develops, the water can run into the wall cavity instead of showing up on a cabinet floor (InspectandTest; Bob Vila). Floating designs also tend to offer less storage than a floor-standing cabinet, which is the trade-off to weigh.

Whatever you choose, choose the cabinet before the plumber roughs in, so the pipes land where the cabinet needs them. Ways to recover storage without adding bulk include a shallower vanity with drawers, a medicine cabinet recessed between studs, wall shelves above the toilet, and a shower niche.

Shower niches

A niche keeps bottles out of the footprint of the shower. Fine Homebuilding advises placing it where there is no plumbing, ducting, electrical or load-bearing framing, and if possible not in an exterior wall, where it can interfere with insulation. A niche is also a hole in the wettest wall in the house, so it has to be waterproofed with the same system as the rest of the shower (Fine Homebuilding; Fine Homebuilding). In a masonry-walled greystone or brick two-flat, your remodeler will need to check what is actually in the wall before promising one.

Light, air and a windowless room

Without a window, the exhaust fan is the room’s ventilation. Chicago’s ventilation table lists 50 CFM for a private bathroom exhaust system designed to run intermittently and 20 CFM for one designed to run continuously, and for the intermittent type it requires an automatic control or ready access to a manual control inside the room (Chicago Municipal Code, Table 18-28-403.3, Note 6). A related provision in the Chicago Mechanical Code adopts the same 50 and 20 CFM figures. Ask the remodeler which fan, duct route and termination they plan, because ducting through an old ceiling or a masonry wall is often the hard part of the job, not the fan itself.

For light, plan layers rather than a single ceiling fixture: general light, task light at the mirror, and, if a shower has no window, a light rated for damp or wet locations. Bright, light-colored finishes and a large mirror help a small room, but they do not replace a working fan. In a condo, ducting and any change to the exterior wall may also need building approval; see remodeling a condo bathroom in Chicago.

Curbless showers in older floors: be cautious

A curbless entry looks clean and helps with mobility, but it asks the floor to do more. The usual approach is to lower the shower area by cutting down into the floor joists so the floor can slope to the drain, then reinforcing the joists and re-laying the subfloor. Fine Homebuilding’s code-official columnist points out that the concern is not collapse but excess deflection, which causes a bouncy floor and cracked tile, and that ripping down graded joists calls for engineering or sistering a new joist alongside (Fine Homebuilding). Another installer avoids cutting the joists by building up with a linear drain at the entry, but only after checking the span and the stiffness of the existing subfloor (Fine Homebuilding).

In an older Chicago home, where joist size, spans and past water damage vary, treat curbless as a design that must be verified in person. A low-profile or very low curb is a simpler compromise. Ask the remodeler what they see in the floor framing before you pick the drain type.

What drives cost in a tiny room

A small bathroom has fewer square feet of tile and fewer fixtures, but the cost does not shrink in proportion. Without quoting numbers, these are the factors that most often move the price of a small bath:

• Moving the drain, toilet or supply lines. Keeping fixtures where they are is the biggest lever. See small bathroom remodel cost in Chicago for how published ranges compare.
• The floor. A curbless shower, a lowered floor or a repair after finding rot adds carpentry. The hidden costs guide covers what turns up behind finished surfaces.
• Waterproofing and the shower type. A tiled shower with niche, bench and linear drain involves more labor and detail than a prefabricated unit.
• Walls and openings. Pocket doors, widened doorways, recessed cabinets and niches all mean opening walls and checking what is inside.
• Ventilation. A new duct route through an old building can cost more than the fan.
• Access and logistics. Tight rooms, stairs and shared buildings affect how materials and debris move, and what the building allows.
• Permits. Plumbing and electrical changes need licensed trades and permits in Chicago; see the permit guide.

What to ask a licensed remodeler

1. Ask where the drain and supply lines will end up. A layout that keeps them in place is usually simpler than one that moves them.
2. Ask who checks clearances and door swing. They should be able to show the 21-inch and 24-inch clearances on a sketch, and tell you which code governs your building.
3. Ask how they will check the floor framing before a curbless shower, a lowered floor or heavy tile is approved.
4. Ask about the walls. A pocket door, a niche or a wall-hung vanity depends on what is inside the wall, and plaster or masonry walls may limit options.
5. Ask what ventilation they are installing, where it vents, and who installs the electrical.
6. Ask for an itemized written scope and price that lists permits, demolition, plumbing, waterproofing, ventilation and finishes, and how hidden conditions are handled.
7. Verify the licenses of the general, plumbing and electrical contractors. See how to verify a Chicago contractor license, and the overview of small bathroom remodeling in Chicago.

Frequently asked questions

What is the best layout for a small bathroom?

It depends on the room. Many small baths are built around a 60-inch alcove tub, and keeping the fixtures on their existing walls is usually the simplest plan. Swapping the tub for a shower, changing the door, or choosing a wall-hung vanity can free floor space without moving the drain.

How much clearance do I need in front of a toilet or vanity?

The model plumbing code referenced by the NKBA calls for at least 21 inches in front of a toilet, lavatory or tub, and 24 inches in front of a shower entry, with the toilet centered at least 15 inches from a side wall. The NKBA recommends 30 inches where space allows. Chicago has its own plumbing code, so confirm with a licensed plumber.

How small can a shower be?

The model code minimum interior size is 30 by 30 inches, with a 30-inch disc fitting inside. The NKBA recommends at least 36 by 36 inches.

Is a pocket door a good idea in a small bathroom?

It can free the floor space a swinging door uses, but the wall pocket must be clear of plumbing, ducts and electrical boxes, and it usually means opening the wall. A pocket door also seals sound less tightly than a hinged door.

Do I need an exhaust fan if my bathroom has no window?

A windowless bathroom relies on mechanical ventilation. Chicago's ventilation table lists 50 CFM for a private bathroom fan that runs intermittently and 20 CFM for one that runs continuously, with an accessible control for the intermittent type. Ask your remodeler to confirm what applies to your building.

Can I add a curbless shower to an older Chicago bathroom?

Sometimes, but it is a structural question first. Lowering the floor usually means cutting into the joists and reinforcing them. Some installers instead build up with a linear drain at the entry. Have the remodeler check the joists and floor stiffness before you commit to the design.

What should I ask a remodeler about a small bathroom?

Ask whether the plan keeps the drain and supply lines where they are, who confirms clearances and door swing, how the floor framing will be checked, and for an itemized written scope and price that lists permits, ventilation and waterproofing.

Sources

• National Kitchen & Bath Association (NKBA), Bathroom Planning Guidelines (clearances, shower size, toilet placement, doorway, with model-code citations): kb.nkba.org. Accessed October 22, 2026.
• Supply House Times, “NKBA: Placement of Bath Fixtures” (shower spray and size guidance): supplyht.com. Accessed October 22, 2026.
• American Society of Home Inspectors, “Code Conundrums: Plumbing” (IRC P2705.1 fixture clearances and door interference): homeinspector.org. Accessed October 22, 2026.
• Angi, “Standard Bathtub Sizes”: angi.com; The Home Depot, “Bathtub Buying Guide: Sizes & Types”: homedepot.com. Accessed October 22, 2026.
• RELIABILT, pocket door kits: reliabiltstore.com; PocketDoors.net, “Common Pocket Door Questions”: pocketdoors.net. Accessed October 22, 2026.
• InspectandTest, “Floating Vanities: Wall Blocking, Plumbing and Leak Checks”: inspectandtest.net; Bob Vila, “Why Floating Bathroom Vanities Are Falling Out of Favor”: bobvila.com. Accessed October 22, 2026.
• Fine Homebuilding, “How to Build a Better Shower Niche”: finehomebuilding.com; “Installing a Shower Niche”: finehomebuilding.com. Accessed October 22, 2026.
• City of Chicago Municipal Code, Table 18-28-403.3, Ventilating Requirements, Note 6 (private bathrooms): amlegal.com; Chicago Mechanical Code (2024 IMC) Table 403.3.2.3, local exhaust: up.codes. Accessed October 22, 2026.
• Fine Homebuilding, “Can Joists be Trimmed to Create a Lowered Floor?”: finehomebuilding.com; “Curbless Shower: Build Up, Not Down”: finehomebuilding.com. Accessed October 22, 2026.