Last updated Reviewed by our licensed Chicago master plumber team
Toilets are the single most-used plumbing fixture in any home — a typical family flushes 2,500+ times per year. That's a lot of wear on a handful of simple internal components. When they fail, they fail loudly: a running toilet wasting 200 gallons per day, a stubborn clog that won't yield to a plunger, a wax ring leak that soaks the subfloor and stains the ceiling below. Plumbers 911 Chicago handles every type of toilet work across Chicago and 245 surrounding cities — from $95 flapper replacements that silence a running toilet in 20 minutes, to comfort-height ADA upgrades for aging-in-place homeowners, to smart toilet installations with bidet, heated seat, and auto-flush features, to bathroom-remodel toilet moves requiring drain relocation and Chicago DOB permits. Every repair uses OEM-grade parts (Korky, Fluidmaster, Kohler Genuine Parts). Every installation uses a new wax ring (never reused), new braided stainless supply line, new flange bolts, and includes full fill/flush testing for 10+ cycles before we leave. Call 833-758-6911 for same-day service, or see related pages: bathroom remodeling, drain cleaning, water leak detection, and emergency plumber.
Common Toilet Problems and How We Fix Them
Most toilet issues fall into a handful of categories. Here's the diagnostic map we use on-site.
Running Toilet (Water Constantly Refilling)
- Symptom: You hear water trickling into the bowl between flushes, or the fill valve kicks on every 5 – 20 minutes even when nobody's used the toilet
- Cause (90% of cases): Worn flapper — the rubber seal at the bottom of the tank deteriorates from chlorine and hard water
- Alt causes: Fill valve stuck open, float set too high, flush valve (the seat the flapper sits on) corroded
- Fix: Replace flapper (most common), fill valve (second most), or both
- Cost: $95 – $200 for flapper/fill valve; $275 – $425 if flush valve replacement is needed
- Time: 20 – 45 minutes
Clogged Toilet (Plunger Won't Clear It)
- Symptom: Water rises when flushed, drains slowly, or stays up
- Cause: Paper overload, flushed objects (toys, wipes, feminine products), or partial drain-line blockage
- Fix: Professional closet auger (6 – 25 ft), drain snake, or removal of toilet for access in persistent cases
- Cost: $185 – $375 typical; $425 – $725 if toilet removal required
- Time: 30 minutes – 2 hours
Toilet Leaking at Base
- Symptom: Water pools on floor around base of toilet; stain on ceiling of floor below
- Cause: Failed wax ring — the seal between toilet horn and drain flange has deteriorated or been compromised by a rocking toilet
- Fix: Pull toilet, scrape old wax, inspect flange (often also needs repair), install new wax ring, reset toilet
- Cost: $185 – $425; add $175 – $525 if flange is broken
- Time: 60 – 120 minutes
Weak or Incomplete Flush
- Symptom: Flush doesn't fully clear the bowl; multiple flushes needed
- Cause: Low tank water level, clogged rim jets, worn flapper closing early, partially clogged trap, failed fill valve
- Fix: Adjust float, descale rim jets (CLR for hard water buildup), replace flapper, or auger the trap
- Cost: $115 – $315
- Time: 30 – 90 minutes
Cracked Tank or Bowl
- Symptom: Visible hairline crack in porcelain, water seeping from tank, or sudden flood
- Fix: Full toilet replacement (porcelain cracks cannot be safely repaired)
- Cost: $325 – $725 labor + new toilet
- Time: 90 – 180 minutes
Toilet Rocks or Wobbles
- Symptom: Toilet moves when you sit on it or lean
- Cause: Loose closet bolts, uneven floor, failed flange, or rotted subfloor under the toilet
- Fix: Tighten bolts and shim if minor; pull toilet and repair flange/subfloor if major
- Cost: $145 – $650 depending on scope
- Time: 45 minutes – 3 hours
Types of Toilets We Install
Not every toilet is right for every bathroom. Here's how we match the toilet to the home.
Standard Two-Piece (Most Common)
- Separate tank and bowl, bolted together on site
- Easiest to repair (parts are universal and cheap)
- Lowest cost: $150 – $450 at big-box or plumbing-supply houses
- Best for: Rentals, secondary bathrooms, budget-conscious replacements
One-Piece Low-Profile
- Seamless tank and bowl — no crevice to harbor dust and grime
- Sleek modern look
- Cost: $350 – $900
- Best for: Master bathrooms, high-end remodels, easy-clean priorities
Comfort-Height / ADA-Compliant
- 17 – 19" seat height (vs. 14 – 15" standard) — easier to sit down and stand up
- Required by ADA for commercial bathrooms; popular for aging-in-place
- Cost: $250 – $850
- Best for: Seniors, tall users, accessibility upgrades
Dual-Flush Water-Saving
- Two flush modes: 1.1 GPF liquid, 1.6 GPF solid (or similar)
- Saves an extra ~20% water vs. standard 1.28 GPF
- Cost: $250 – $700
- Best for: Eco-conscious homeowners, LEED-rated projects
Smart / Integrated Bidet
- Heated seat, adjustable bidet spray, warm-air dry, auto-flush, nightlight, odor filter
- Kohler Numi, TOTO Neorest, Bio Bidet Bliss, etc.
- Cost: $1,800 – $7,500 for the unit; $450 – $900 installation labor
- Electrical required: GFCI outlet within 3 ft of toilet — we coordinate with licensed electrician if needed
Wall-Hung (Concealed Tank)
- Tank hidden in wall, bowl mounted on carrier frame
- Fully adjustable seat height during install
- Cost: $900 – $4,500 for the unit + carrier; $700 – $1,400 installation
- Requires open wall access or new framing
- Best for: Luxury remodels, small powder rooms where floor space matters
Pressure-Assisted
- Uses compressed air to deliver powerful flush
- Louder but extremely effective for homes with drain-line issues
- Cost: $350 – $750
- Best for: Old Chicago homes with flat-slope or partially obstructed drain lines
Toilet Installation Cost in Chicago
Here's what typical projects cost in 2026 dollars. Prices include licensed labor, materials (wax ring, supply line, bolts), haul-away of old unit, and warranty — not the new toilet itself unless noted.
| Job | Labor Only | With Mid-Range Toilet | Notes |
|---|---|---|---|
| Standard replacement, same rough-in | $245 – $450 | $495 – $875 | Most common job |
| Comfort-height replacement | $285 – $500 | $535 – $1,050 | ADA-compliant height |
| Dual-flush replacement | $275 – $475 | $525 – $950 | Adds water savings |
| Smart toilet (with bidet) | $450 – $900 | $2,250 – $7,900 | May need electrical |
| Wall-hung (concealed tank) | $700 – $1,400 | $1,600 – $5,100 | Requires carrier + open wall |
| New rough-in (first install) | $950 – $2,800 | +$250 – $750 toilet | Permit + drain rough |
| Wax ring replacement | $185 – $425 | n/a | Pulls and resets existing toilet |
| Flange repair + new wax ring | $325 – $950 | n/a | Broken closet flange |
| Subfloor repair + reset | $550 – $2,400 | n/a | Rotted wood from long-term leak |
What Changes the Cost
- Rough-in size mismatch: If your new toilet has a 10" or 14" rough-in and plumbing is set for 12", we need an offset flange — add $75 – $200
- Flange condition: A cracked or sunken flange doubles labor time
- Floor type: Tile floor with heavy toilet (one-piece): we protect the tile but remove/reset takes longer
- Second floor: Heavier units require 2-tech lift — add $75 – $150
- Water shutoff: If the toilet stop valve is seized or corroded, we replace it — $85 – $165
- Old vs. new construction: Turn-of-century homes with cast-iron closet bends often need flange adapters
Comfort-Height, Smart, and ADA Toilet Upgrades
The two upgrade categories we install most often in Chicago: comfort-height for aging-in-place and smart toilets for luxury remodels.
Comfort-Height (ADA) Upgrade
Standard toilets have a 14 – 15" bowl height. Comfort-height (also called "chair-height" or "right height") are 17 – 19". That 3 – 5" makes a massive difference for:
- Anyone over 60
- Tall users (6'+)
- People with knee, hip, or back issues
- Wheelchair transfers
- Pregnant women
Most major brands make them — Kohler Highline, TOTO Drake II, American Standard Champion 4. Same rough-in, same bolt pattern, same water connection. Just taller. Installation is identical to standard — labor cost doesn't change based on height.
Smart Toilet / Bidet Upgrade
Once you've used a heated seat with bidet spray on a January morning in Chicago, you don't go back. Features we install:
- Heated seat (adjustable temperature)
- Rear and front bidet wash (warm water, adjustable pressure and position)
- Warm-air dry
- Auto-flush (motion sensor or app-controlled)
- Nightlight (LED inside the bowl)
- Deodorizer (carbon filter with fan)
- Remote control or phone app
What installation requires:
- GFCI electrical outlet within 3 ft (we coordinate with electrician — $250 – $600 for new outlet)
- Water supply in standard location — no rough-in changes
- Drain / flange unchanged from standard toilet
- Weight considerations — most smart toilets are heavier; we confirm floor structure
Brands we install: TOTO Neorest, Kohler Numi 2.0 and Veil, Bio Bidet Bliss, Brondell Swash. We are not an exclusive dealer — whatever you buy, we install.
Standalone Bidet Attachment (Budget Upgrade)
If a $5,000 smart toilet isn't in the budget, we install bidet seats that attach to an existing toilet:
- Cold-water only: $150 – $350
- Warm-water (electric): $350 – $900
- Installation: $145 – $275
Connects to the toilet's water supply line via a T-valve. No drain modifications. No permits. 30 – 60 minute install.
Chicago Code and Permit Requirements
Most toilet replacements don't require a permit in Chicago because you're not relocating fixtures or altering drain/vent layout. But some jobs do.
Permit NOT Required
- Like-for-like toilet replacement (same location, same rough-in)
- Wax ring, flapper, fill valve repair
- Supply-line replacement
- Flange repair (in-place)
Permit REQUIRED
- Relocating toilet to a new location (adds drain + vent modifications)
- Adding new toilet in previously un-plumbed room (basement bathroom, second-floor addition)
- Wall-hung conversion (alters wall framing and drain path)
Chicago Plumbing Code Basics
- Minimum 15" from center of toilet to any sidewall (IPC section 405.3.1)
- Minimum 21" of clear floor space in front of toilet (Chicago amendment — 24" in new construction)
- Vent required within 6 ft of trap — no long un-vented runs
- 1.28 GPF maximum flush volume on new installations (Illinois energy code)
- Accessible installations (commercial) must comply with ADA 604 for clearances and flush controls
Permit Cost and Timeline
- City of Chicago plumbing permit: $100 – $450 depending on scope
- Plan review: 5 – 15 business days
- Inspection: scheduled within 48 hours of completion
- We handle all permit filing and inspector coordination — no paperwork for you
Frequently Asked Questions About Toilet Services
How much does a plumber charge to install a toilet in Chicago?
Standard toilet installation labor in Chicago is $245 – $500 (2026 pricing), plus $150 – $900 for the toilet itself depending on model. Smart toilets and wall-hung units run higher ($700 – $1,400 labor) because of electrical coordination and/or carrier framing. Every install includes new wax ring, new braided stainless supply line, new flange bolts, and haul-away of the old unit.
Can a plumber fix a running toilet?
Yes — running toilets are our single most common repair. 90% of the time it's a worn flapper ($95 – $165 repair, 20 – 45 minutes). The rest are fill valves, flush valves, or float adjustment. A running toilet wastes up to 200 gallons per day, so fixing it pays for itself in 2 – 6 months on the water bill. See our diagnostic: running toilet test.
What causes a toilet to leak at the base?
A failed wax ring — the seal between the toilet's drain horn and the floor flange. Wax rings deteriorate over 10 – 25 years, or fail prematurely if the toilet rocks (uneven floor, loose bolts). The fix: pull toilet, scrape old wax, inspect flange, install new wax ring, reset toilet. Cost is $185 – $425 unless the flange is also broken (add $175 – $525). Fix it promptly — chronic wax ring leaks rot subfloors and stain ceilings below.
How often should toilets be replaced?
Toilet bodies (porcelain) last 25 – 50+ years. The internal components (flapper, fill valve, flush valve) wear out in 3 – 10 years and are repairable. Replace the whole toilet when: (1) porcelain is cracked, (2) it's pre-1994 using 3.5 – 6 GPF (a new 1.28 GPF saves $80 – $200/year on water), (3) it requires frequent repairs, (4) you're aging-in-place and want comfort-height, or (5) you're remodeling. Replacement is a 90 – 180 minute job.
Do I need a permit to replace my toilet in Chicago?
No permit required for like-for-like replacement (same location, same rough-in) — this is the vast majority of jobs. Permit IS required if you're relocating the toilet to a new spot (adds drain + vent changes), adding a new toilet in a previously unplumbed room, or converting to wall-hung (alters framing). We handle all permitting and inspector coordination — no paperwork for you.
What's the difference between 10-inch, 12-inch, and 14-inch rough-in?
Rough-in is the distance from the finished wall behind the toilet to the center of the closet flange. 12" is standard in Chicago (post-1960s homes). 10" is common in older/pre-war homes and small bathrooms. 14" appears in some newer construction. You must match your new toilet to your existing rough-in — or use an offset flange ($75 – $200 extra). Measure before buying a toilet — we're happy to confirm during a free phone consult.
Is a comfort-height toilet worth the upgrade?
For anyone 60+, over 6' tall, or with knee/hip/back issues — yes. The 17 – 19" seat height (vs. 14 – 15" standard) makes a huge day-to-day difference in comfort and mobility. Installation cost is identical to a standard toilet. The only downside: small children may find it slightly tall. Brands: Kohler Highline, TOTO Drake II, American Standard Champion 4.
Can you install a smart toilet with bidet?
Yes — smart toilet installation is one of our fastest-growing services. Requirements: (1) GFCI electrical outlet within 3 ft of toilet (we coordinate a licensed electrician for ~$250 – $600 if one doesn't exist), (2) standard water supply, (3) standard drain/flange. Install labor is $450 – $900 depending on complexity. Brands we install: TOTO Neorest, Kohler Numi and Veil, Bio Bidet Bliss, Brondell. If you just want the bidet without replacing the toilet, a bidet seat attachment is $150 – $900 for the seat + $145 – $275 to install.
What should I do if my toilet is overflowing?
Immediately lift the tank lid and push the flapper down (or close the rubber seal at the bottom) to stop water flow into the bowl. If that doesn't stop it, shut off the water supply at the valve behind the toilet (turn clockwise). Do NOT flush again. Then call us at 833-758-6911 — we offer 24/7 emergency service for overflow emergencies with typical 30 – 60 minute response in Chicago.
Why does my toilet keep clogging?
Recurring clogs usually indicate one of three issues: (1) weak flush (1.28 GPF toilet plus low tank water level = under-powered flush — adjust float or swap to pressure-assist), (2) partial drain-line blockage (roots, grease buildup, or sagging pipe — needs drain cleaning and possibly sewer camera inspection), or (3) flushing non-flushable items (wipes, paper towels, feminine products — the #1 cause in Chicago). If it happens more than monthly, call for camera inspection.