The tub-to-shower conversion is the single most requested bathroom project in Naperville — especially in 1990s two-stories where the big platform tub never gets used. Here’s what it costs, how long it takes, and the decisions that matter.

What Does a Tub-to-Shower Conversion Cost in Naperville?

Most conversions we see fall between $10,000 and $22,000, depending on tile choice, whether plumbing moves, and the shower door. A straightforward swap — tub out, tiled shower in, same drain location, acrylic or mid-range tile — lands near the lower end. Moving the drain or valve to the opposite wall, large-format tile, a frameless glass enclosure, and a bench or niche push it higher.

For context, a full hall-bath remodel in Naperville typically runs $8,000–$18,000, so a conversion that keeps the vanity, toilet, and floor in place is often the best value per dollar in the room.

How Long Does It Take?

A straightforward conversion takes 5–10 working days: demolition (1–2 days), plumbing rough-in, waterproofing and tile (the longest phase), grout and fixtures, glass door install, and final cleanup. If the drain has to move — common when switching from a tub on one wall to a shower on another — add a few days for concrete or subfloor work underneath.

Do You Need a Permit in Naperville?

Usually, yes. Naperville requires a Residential Addition/Alteration Permit whenever plumbing is altered, and a tub-to-shower conversion almost always touches the drain, the valve, or both. The permit is filed through the City’s Civic Access portal and inspected by the Building Division. A reputable contractor files it for you — if someone suggests skipping the permit on a drain move, that’s a red flag.

Curbless or Curbed?

Curbless (zero-entry) showers are popular for aging-in-place and for the clean look, but they need the floor to slope correctly to a linear or center drain — which sometimes means lowering the subfloor or raising the surrounding floor. A low curb (2–3 inches) gives you 90% of the look with fewer structural gymnastics and keeps water contained. For most Naperville hall baths, a low curb is the practical sweet spot.

Decisions That Actually Matter

• Waterproofing system. The shower should get a full membrane system — not just “water-resistant” backer board. This is the part that decides whether the shower lasts 20 years or 5.
• Glass. Frameless glass looks best but costs more and shows water spots. With Naperville water at 8–17 grains per gallon, get coated glass that wipes clean — uncoated glass etches within a couple of years.
• Valve placement. Put the controls where you can reach them without stepping under cold water — near the shower entry, not under the showerhead.
• Niche vs. shelf. A recessed niche costs little extra during construction and beats a rusting corner caddy forever.
• Ventilation. If the fan is original, replace it now while the ceiling is open. Size it to the room and vent it through the roof — never into the attic.

What About the Resale Question?

Realtors sometimes warn that removing the only tub hurts resale with young families. In practice, Naperville buyers in 2026 overwhelmingly prefer a great shower to a mediocre tub — and most homes here have a second full bath with a tub anyway. If your home has only one bathroom and it’s a tub, think twice. Otherwise, convert with confidence.

Ranges are typical for Naperville-area projects; your written line-item estimate will reflect your exact plumbing, tile, and glass choices.