Bathtub Installation & Repair in Chicago, IL

Each tub type has different plumbing requirements. Here's what we install and what each costs for the plumbing portion.

Alcove Tub (Most Common)

• Fits between three walls — one finished long wall, one end wall, and one showerhead-side wall
• Standard sizes: 60" × 30" × 14 – 19" deep
• Drain at one end (tub drain assembly with stopper)
• Valve mounted in wall with tub spout, pressure-balancing cartridge, and optional showerhead diverter
• Materials: fiberglass, acrylic, porcelain-enameled steel, or cast iron
• Plumbing cost: $1,200 – $3,500 (higher end for cast iron due to weight and 2-plumber requirement)

Drop-In Tub

• Set into a built-deck or platform (often tile)
• Typically rimless — the deck is the finished edge
• Drain at one end — same as alcove
• Deck-mounted or roman-style faucet for filler
• Plumbing cost: $1,800 – $4,500

Freestanding Tub (Modern Master Bath Favorite)

• Stands alone in the bathroom with four finished sides
• Floor-mounted or wall-mounted filler — dramatic visual, more complex plumbing
• Drain in the floor under the tub — requires floor drain routing
• No overflow on most designs (modern style)
• Weight considerations — cast iron freestanding tubs can weigh 450+ lbs empty, 1,400 lbs with water and a bather
• Plumbing cost: $2,500 – $6,500 (higher for cast iron or floor-mounted filler)

Whirlpool Tub

• Jets powered by recirculating pump — typically 1 HP, 120V or 240V
• Dedicated 20-amp GFCI circuit required
• Accessible motor panel for future service
• Larger supply lines to fill quickly
• Drain and overflow assembly often integrated with jet system
• Plumbing cost: $3,500 – $8,000 (not counting electrician)

Walk-In Tub (Accessibility)

• Door on the side with watertight seal
• Quick-fill and quick-drain features (fill and drain in 60 – 90 seconds vs. 5 – 15 minutes for standard tub)
• Integrated seat and grab bars
• Sometimes includes jets and heated surfaces
• Higher supply flow requirements for quick fill (larger supply lines often needed)
• Plumbing cost: $3,500 – $7,500

Soaking Tub (Deep Tub for Japanese-Style Bathing)

• Deeper than standard — typically 20 – 30" deep vs. 14 – 19" for standard alcove
• Smaller footprint but taller — often 48" × 30" × 22" for master bath applications
• May require higher water heater capacity to fill
• Often paired with overflow drain higher on the wall
• Plumbing cost: $2,000 – $5,500

A tub replacement is not just swap-one-for-one. Here's what a professional plumber does.

Step 1: Pre-Demo Assessment

• Confirm existing tub dimensions and drain/valve locations
• Identify tub material (critical for planning — cast iron requires 2 plumbers)
• Check water shutoff location and function
• Inspect visible plumbing for galvanized, lead-soldered copper, or other upgrade candidates
• Check floor stability around the tub

Step 2: Shut-Offs and Demo

• Shut off water to the bathroom at the nearest main valve
• Disconnect drain, overflow, and supply at the tub
• Remove tub spout, valve trim, and showerhead
• Cut tile around the tub (or plan to re-tile after)
• Remove tub:
• Fiberglass/acrylic — usually can be cut apart in place for easy removal
• Porcelain-enameled steel — moderate weight, one person can usually handle
• Cast iron — extremely heavy; usually requires 2 plumbers and sometimes breaking the tub apart with a sledgehammer for safe removal

Step 3: Subfloor and Framing Inspection

• With the tub out, inspect the subfloor for rot, especially around the drain and back wall
• In older Chicago homes (pre-1950), subfloor replacement is common — plan for $300 – $800 in subfloor repair
• Inspect wall framing for water damage or mold
• Verify the floor can support the new tub's weight (especially for cast iron and filled tubs)

Step 4: Plumbing Updates

• Replace tub drain assembly (new gaskets, overflow, and strainer)
• Update supply lines if galvanized or lead-soldered
• Install new shut-offs at the tub for future serviceability
• Install anti-scald valve (required by code if valve is being replaced)
• Pressure test supply lines

Step 5: Set the New Tub

• Dry-fit the new tub to verify dimensions
• Apply mortar bed or leveling compound (for structural support and sound dampening)
• Set and level the tub
• Secure per manufacturer spec (nailing flange, mounting brackets, etc.)
• Connect drain and overflow
• Make final supply connections

Step 6: Fill Test

• Fill the tub completely
• Check every joint and connection for leaks (under tub, around drain, at overflow)
• Drain and watch for drain leaks under the floor
• Run for 30+ minutes to catch slow leaks

Step 7: Finish

• Install valve trim, tub spout, showerhead
• Install drain stopper
• Apply caulk around tub (three sides of alcove, all exposed edges of freestanding)
• Rough-in inspection coordination if DOB permit pulled

We repair tubs across Chicago every week. Here are the most common issues and what repair costs.

Leaking Drain Assembly

• Symptom: water appears on floor below tub, stained ceiling in room below
• Cause: deteriorated drain gaskets, corroded brass drain shoe, loose overflow fitting
• Fix: replace entire drain and overflow assembly (access from below if possible; otherwise pull tub)
• Cost: $200 – $600 (access dependent)

Dripping Tub Valve

• Symptom: tub spout drips when water is off
• Cause: worn cartridge in the valve body
• Fix: replace cartridge (same process as shower)
• Cost: $150 – $350

Slow Drain

• Symptom: tub takes longer to drain after bathing
• Cause: hair and soap scum buildup in P-trap
• Fix: snake drain, clean P-trap
• Cost: $150 – $300

Diverter Won't Hold

• Symptom: pulling the diverter doesn't fully send water to the showerhead — water keeps coming from tub spout
• Cause: worn diverter in the tub spout (if pull-up spout) or worn cartridge diverter
• Fix: replace tub spout (if self-contained diverter) or replace cartridge
• Cost: $75 – $350

Cracked Tub

• Symptom: visible crack in the tub surface; water leaking through crack
• Fix: tub replacement (cracks cannot be reliably repaired in load-bearing sections)
• Cost: full replacement — $1,200 – $3,500+

Overflow Gasket Failure

• Symptom: water leaks when filled to high level
• Cause: deteriorated rubber gasket at the overflow
• Fix: replace overflow gasket (access from behind wall or under tub)
• Cost: $150 – $400

Chipped Porcelain Finish

• Symptom: cosmetic chip; may expose underlying steel or iron to rust
• Fix: porcelain patch kit (DIY or pro); for serious damage, reglazing
• Cost: $50 – $400 (not typically plumbing scope)

Whirlpool Jet Issues

• Symptom: jets don't work, work intermittently, or make unusual noise
• Cause: failed pump motor, clogged intake, failed air switch
• Fix: diagnose specific failed component
• Cost: $300 – $1,500

Chicago's housing stock creates specific challenges for tub installations that plumbers in newer markets don't face.

Original Cast Iron Tubs in Pre-1950 Homes

Many Chicago homes still have the original cast iron tub from 1910 – 1950. These are 300 – 500 lb tubs typically set into a mortar bed on a wood subfloor. When replacing:

• Consider breaking apart in place — a sledgehammer and respiratory protection is often easier than trying to carry a 400 lb tub out
• Dispose as construction debris — many recyclers pay $0.05 – $0.10/lb scrap for cast iron, partial offset to disposal cost
• Check subfloor for rot — cast iron tubs in old homes almost always have some subfloor rot from years of drain leaks
• Framing reinforcement may be needed if homeowner is replacing with another cast iron tub

Lead Drum Traps

Pre-1940 Chicago bathrooms often have lead drum traps under the tub — a horizontal lead canister with ports for the drain and overflow. These are usually at end-of-life and need replacement with modern P-traps.

Galvanized Supply Lines

• Replace any visible galvanized during tub replacement
• Typical added cost: $300 – $900

Old Non-Compliant Valves

• Pre-1994 tub valves lack anti-scald protection
• Required to upgrade if performing tub valve work
• Typical added cost for valve body upgrade: $400 – $900

Second-Floor Bathrooms in 2-Flats

Chicago's many 2-flat and 3-flat buildings have bathrooms above living spaces. Tub leaks cause expensive damage below. We:

• Pressure test extensively before closing up
• Install leak-detection pans under tub (when possible)
• Recommend regular caulk inspection for alcove tub joints

Condo Plumbing Shutoff Constraints

• Condo unit often doesn't have bathroom-specific shutoff — requires shutting off the riser for the entire stack
• Must coordinate with building engineer for shutoff timing
• Typical adds 1 – 2 hours for coordination