For Chicago homes and condos, existing conditions can be the biggest variable. Older plumbing, uneven framing, deteriorated subfloor, concrete slabs, shared building systems, or association rules may affect what can be built. The best time to identify those constraints is before finishes are ordered.
Start With the Existing Tub Area
An alcove tub often occupies a footprint that can become a practical shower, but the drain location, valve height, wall condition, and opening width may need to change. Once the tub and surround are removed, the team can inspect framing, subfloor, plumbing, and evidence of previous leakage.
Older Chicago bathrooms may reveal plaster, damaged substrate, corroded piping, walls that are not plumb, or ventilation that needs attention. Those conditions should be addressed before the new shower assembly is closed and tiled.
The existing opening also affects the design. A narrow alcove may work better with a fixed glass panel than a swinging door; a deeper opening may accommodate a bench or niche without crowding the standing area. Plan the enclosure and storage before rough plumbing is finalized.
Waterproofing Is the Core System
Tile and grout are finish materials, not the primary waterproofing layer. A shower needs a complete, compatible assembly that manages water at the floor, walls, corners, penetrations, niches, benches, and threshold.
That can include a prefabricated shower base or a properly sloped tiled floor assembly, a compatible drain connection, wall waterproofing, and carefully detailed transitions. The exact system can vary, but its components should be designed to work together.
Ask the contractor to identify the waterproofing approach in the proposal. Surface caulk should not be treated as a substitute for the underlying water-management system.
Drainage and Floor Geometry Come Before Tile
A tub drain and a shower drain do not automatically create the same construction conditions. Converting the space may require plumbing changes, and the shower floor needs sufficient geometry to direct water toward the drain while meeting the chosen threshold design.
This becomes especially important for low-threshold and curbless showers. Lowering the entry can require changes below the finished tile rather than simply using a thinner curb. In a wood-framed floor, the framing and subfloor assembly need to be evaluated. In a condo, concrete slab conditions and restrictions on penetrations can limit the available approach.
Do not select large-format shower-floor tile solely for appearance. The tile layout has to work with the drain and floor slopes; the installer should evaluate whether the selected material can follow the required geometry cleanly.
Curbed, Low-Threshold, or Curbless?
A conventional curb is often the most straightforward way to contain water. A lower threshold can reduce the step into the shower. A truly curbless design creates the smoothest transition, but it can require more substantial floor work to achieve drainage without raising the surrounding bathroom floor excessively.
Choose the threshold based on the user, room, structure, and water-control strategy—not on a photo alone. Door location, shower-head direction, glass configuration, and the size of the wet area all influence how well the finished shower contains water.
For accessibility, plan the whole shower rather than focusing only on the curb. Useful features can include wall reinforcement for securely mounted grab bars, a handheld shower, reachable controls, a bench where appropriate, slip-resistant flooring, adequate entry width, and room for assistance when needed. Our accessible bathroom remodeling guide covers these decisions in more depth.
Plan Blocking, Controls, Niches, and Glass Before Walls Close
Small details become expensive when they are decided after waterproofing and tile begin. Before closing the walls, confirm where grab bars, glass hardware, a shower seat, handheld-shower rail, and other wall-mounted elements may need solid backing.
Valve and control placement should also reflect how the shower will actually be used. A control that can be reached without standing directly under the shower can be more convenient, while a handheld fixture can improve bathing flexibility and cleaning.
Niches need the same waterproofing attention as the surrounding walls. Their dimensions should coordinate with tile layout so the installer is not forced into awkward cuts or compromised detailing. Glass should be measured from finished conditions rather than assumed from rough framing dimensions.
Ventilation and Moisture Management
A new shower can introduce more exposed wet surface than the bathtub it replaces. Evaluate the bathroom's exhaust ventilation as part of the project rather than treating it as an unrelated fixture.
The goal is not only to clear a mirror after a shower. Good moisture management combines the shower waterproofing system with effective room ventilation and appropriate finish materials. Existing fans, ducts, and termination conditions should be evaluated when the bathroom already has persistent humidity or moisture problems.
Condo and Multifamily Considerations
A condo tub-to-shower conversion may involve more than the bathroom itself. Building rules can affect work hours, debris removal, water shutoffs, contractor access, waterproofing documentation, and changes that touch shared plumbing or structural slabs.
Do not assume that a curbless detail or drain relocation that works in a single-family home can be copied into a condo. Confirm the building constraints before promising a design. For broader approval planning, see our Chicago condo remodeling permits guide.
What Should Be Included in the Scope?
A useful proposal should identify more than tile and fixtures. Depending on the existing bathroom and design, the scope may include:
- Protection, demolition, and disposal
- Plumbing modifications and drain work
- Subfloor, framing, or substrate repairs
- Shower base or sloped floor assembly
- Complete waterproofing system
- Valve, shower head, handheld fixture, and trim
- Niches, bench, and grab-bar blocking where planned
- Wall and floor tile, edge treatment, and grout
- Glass door or fixed panel
- Ventilation, lighting, and electrical work where applicable
- Painting and finish repairs outside the tiled area
- Permit or association coordination when required by the scope
Comparing proposals is easier when these components are explicit. A low number that excludes substrate repair, glass, plumbing, or finish work is not directly comparable with a complete conversion scope.
A Practical Planning Sequence
- Document the existing room. Measure the tub alcove, doors, fixtures, and clearances; note ventilation and visible moisture issues.
- Choose the shower concept. Decide whether the project is curbed, low-threshold, or curbless and whether accessibility features are needed.
- Coordinate plumbing and structure. Confirm drain strategy, valve location, floor conditions, and any building constraints before ordering finishes.
- Finalize wall details. Locate blocking, niches, benches, controls, and glass attachment points.
- Select a compatible finish package. Coordinate shower-floor tile, wall tile, drain, trim, grout, and glass with the waterproofing and geometry.
- Build and verify concealed work first. Substrate, plumbing, waterproofing, and reinforcement matter more to long-term performance than decorative finishes.
If the conversion is part of a larger project, our Chicago bathroom remodeling service explains the broader renovation scope. You can also request an estimate for a project-specific review.
Frequently Asked Questions
How long does a tub-to-shower conversion take?
The schedule depends on concealed repairs, plumbing changes, waterproofing requirements, tile complexity, inspections when applicable, material availability, and glass fabrication. A proposal should distinguish active construction time from product lead times and post-tile glass measurement.
Will removing the only tub hurt resale?
Some future buyers value having a bathtub, particularly households with small children, but there is no universal answer. Balance possible resale preferences against the current household's accessibility, safety, and daily use of the room.
Can a condo bathtub become a curbless shower?
Sometimes. Floor thickness, slab conditions, drain location, shared systems, waterproofing requirements, and association rules need to be evaluated before a curbless result is promised.
Can grab bars be added later?
They can sometimes be added later when suitable structure or an approved mounting solution is available, but planning reinforcement before walls close gives more flexibility for secure placement. If future accessibility is likely, discuss likely grab-bar locations during the conversion.
Should the shower glass be ordered before tile is installed?
Final glass dimensions are typically based on finished conditions because tile, walls, curbs, and openings can vary from rough dimensions. Coordinate the glass strategy earlier, but verify final measurements at the appropriate stage of construction.
Reviewed by the Budget Construction Company Editorial Team
Budget Construction Company has served Chicago homeowners since 1976. Project costs and requirements vary by property, scope, and municipality.