Storage tank
$1,600–$2,400Typical cost, including installation
WATER HEATER REPLACEMENT IN CAHOKIA HEIGHTS
Cahokia Heights Water Heater
Replacement
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See what replacement costs ↓CAHOKIA HEIGHTS AT A GLANCE
Replacing a water heater in Cahokia Heights.
Cahokia Heights lists no plumbing or water heater permit in its fee schedule, so check with Code Enforcement first. Ameren Illinois supplies power and gas. Water comes from the city, Commonfields of Cahokia or Illinois American Water, by neighborhood. Contractors must post a $10,000 bond and a $500 deposit before work starts.
- Permit to replace with the same type
- Check with the city · City of Cahokia Heights Department of Code Enforcement
- Who gets the permit
- Under Illinois' Plumbing License Law, an owner who lives in a single-family home can do their own plumbing if it meets the Illinois State Plumbing Code. Otherwise, an Illinois-licensed plumber must do the work.
- Electric utility
- Ameren Illinois
- Gas utility
- Ameren Illinois
- Water
- Cahokia Heights Water & Sewer Department, Commonfields of Cahokia, or Illinois American Water, depending on area
- Rebate worth checking
- Ameren Illinois heat pump water heater incentives (Active)
- Typical home
- Built 1964 (median) · 52% owner-occupied
- Companies found
- 3 that advertise water heater work
01 / TYPICAL PRICES
What a new water heater costs.
Know before you call.
Heat-pump tank
$2,500–$5,000Typical cost, including installation
Tankless
$2,400–$5,400Typical cost, including installation
AI equipment illustrations; models vary and images are not to scale. Typical national prices from Home Depot ↗, checked September 28, 2026. The source doesn’t say how many jobs the ranges are based on. These are not Cahokia Heights averages or guaranteed quotes.
Compare what each quote includes.Equipment · Labor · Permits · Old heater removalHow to compare quotes →
What we know about prices in Cahokia Heights
- National installer’s published rangeThe ranges above. Home Depot ↗
- Local company’s advertised price1 of the companies listed for Cahokia Heights post water heater prices or specials on their websites: Hoffmann Brothers. Each offer has its own conditions.
- Measured local dataNot collected yet, so no Cahokia Heights average is shown.
What can change the price in Cahokia Heights?
Electric permits for 100–200 amp work cost $75. Residential inspections are also $75 (fee schedule posted February 2024).
02 / COMPANIES WE FOUND
Who replaces water heaters in Cahokia Heights?
Companies that advertise water heater replacement here, with what their water heater customers say.
Companies we found in our research. They are not Ember & Tank providers or partners. We show selected reviews, not a rating or every review. How we choose reviews →
Hoffmann Brothers
Lists Cahokia Heights among the areas it serves. Based in 3700 Rider Trail S, Suite 100, Earth City, MO 63045 (other St. Louis-area offices: 1643 Tower Grove Ave, St. Louis, MO 63110; 2043 Woodland Pkwy, Suite 100, St Louis, MO 63146; 1254 University Drive, Suite 800, Edwardsville, IL 62025).
- Tank
- Tankless
- Repair
Published price:
What the reviews say
Water heater feedback Customers praised quick replacements (often same or next day), clean installs with floor protection, clear explanations of options, warranties and rebates, and no pushy selling.
Worth knowing A 2026 BBB reviewer said a $927 water heater repair failed, the unit was replaced for about $4,000, and the company credited $450 only after back-and-forth; another reviewer said the company was not the cheapest.
5 water heater reviews read, checked September 30, 2026.
Darwyn's Plumbing, Inc.
Lists Cahokia Heights among the areas it serves. Based in 2702 Camp Jackson Rd, Cahokia, IL 62206.
- Tank
- Tankless
- Repair
- Emergency service
What the reviews say
We haven’t found reviews that mention this company’s water heater work yet.
Roto-Rooter Plumbing & Water Cleanup (St. Louis)
Lists Cahokia Heights among the areas it serves. Based in 2671 Washington Ave, St Louis, MO 63103 (local branch of national company).
- Tank
- Tankless
- Heat pump
- Repair
- Emergency service
What the reviews say
We haven’t found reviews that mention this company’s water heater work yet.
Order: companies based in Cahokia Heights first, then companies whose water heater reviews we’ve read. Each group is alphabetical. These businesses are not our employees or vetted partners and do not receive requests from Ember & Tank. We haven’t checked their license, insurance or quality of work. IDPH plumber license verification ↗.
See before-and-after replacement examples from independent companies →
HOMES IN CAHOKIA HEIGHTS
What Cahokia Heights homes are like.
1964Median year built
75%Built before 1980
52%Owner-occupied
59%Heat with utility gas
81%Single-family homes
About 75% of homes were built before 1980. Older homes often have older venting, smaller closets and shutoff valves that should be checked before install day.
59% of homes heat with utility gas, so gas water heaters with existing venting are common here.
U.S. Census Bureau, American Community Survey ACS 2024 5-year ↗ (2020-2024). Heating fuel is what homes use to heat the house. It often, but not always, matches the water heater’s fuel.
LOCAL CONDITIONS
What’s different in Cahokia Heights.
Three possible water providers
The city says Cahokia Heights Water & Sewer isn't the only water provider in town. Commonfields of Cahokia and Illinois American Water serve some areas. The city office can tell you which one serves your address.
You need an occupancy permit to start water service
New customers starting city water service must show a current occupancy permit from Code Enforcement. The posted fee schedule lists it at $100.
Cahokia Heights – Water & Sewer Department ↗ · Cahokia Heights – Code Enforcement New Fee Schedule (PDF, posted Feb. 2024) ↗
Contractor bond and deposit
Before starting a project, a company must post a $500 deposit and a $10,000 surety bond, show proof of $1 million in liability insurance, and pay a $100 application fee.
ENERGY & WATER
Who supplies Cahokia Heights homes.
Energy
- Electric: Ameren Illinois
- Gas: Ameren Illinois
Ameren Illinois electric tariff – Cities, Villages, Communities and Adjacent Areas served ↗ · Ameren Illinois gas tariff – Cities, Villages, Communities and Adjacent Areas served ↗
Water
Cahokia Heights Water & Sewer Department, Commonfields of Cahokia, or Illinois American Water, depending on area
REBATES & CREDITS
Rebates for Cahokia Heights homes.
For Ameren Illinois customers in Cahokia Heights. Ask installers for the price before rebates, then check with the program that you qualify.
- Ameren Illinois heat pump water heater incentives ↗Active$1,150 instant discount when a contractor buys an ENERGY STAR heat pump water heater from a participating distributor, or when you use a Program Ally contractor.
- Illinois IRA Home Energy Rebates (HEAR and HOMES) ↗Not launchedIllinois EPA says its HEAR application has not yet been processed by U.S.
- Federal Energy Efficient Home Improvement Credit (25C) ↗EndedCovered improvements made through December 31, 2025.
Checked September 30, 2026. Who qualifies and the conditions: Illinois rebates · How to check an incentive.
PERMITS & LICENSING
Permits and licenses in Cahokia Heights.
Permits and who issues them
Cahokia Heights' Code Enforcement Department handles building permits and inspections. Its fee schedule lists electric, roof, general construction and occupancy permits, but no plumbing or water heater permit. Call Code Enforcement at 618-337-9517 before replacing a water heater.
The city's FAQ says a company starting a project must submit plans to the Mayor, pay a $500 deposit and a $100 application fee, file a $10,000 surety bond, and carry at least $1,000,000 in liability insurance.
City of Cahokia Heights Department of Code Enforcement ↗ · Cahokia Heights – Department of Code Enforcement ↗ · Cahokia Heights – Code Enforcement New Fee Schedule (PDF, posted Feb. 2024) ↗ · Illinois Plumbing License Law, 225 ILCS 320/3 (homeowner exemption) ↗
Check the installer’s license
Ask for the license number and search it yourself on the IDPH plumber license verification ↗. A listing on Ember & Tank is not a license check. Illinois licensing explained →
NEARBY CITIES
Compare places near Cahokia Heights.
| City | Distance | Permit to replace | Fee | Electric |
|---|---|---|---|---|
| East St. Louis | 3 mi | Required | — | Ameren Illinois |
| Fairview Heights | 8 mi | Check with city | — | Ameren Illinois |
| Columbia | 9 mi | Check with city | $100 | Ameren Illinois |
| Swansea | 9 mi | Required | $0.09 | Ameren Illinois |
| Belleville | 10 mi | Required | — | Ameren Illinois |
| Collinsville | 11 mi | Not required (conditions apply) | $25 | Ameren Illinois, Southwestern Electric Cooperative |
COMMON QUESTIONS
Cahokia Heights water heater questions.
Who supplies water in Cahokia Heights?
It depends on the area: Cahokia Heights Water & Sewer, Commonfields of Cahokia or Illinois American Water.
What do contractors need to work in Cahokia Heights?
According to the Code Enforcement FAQ: a $500 deposit, a $10,000 surety bond, at least $1 million in liability insurance, and a $100 application fee.
More guides: Illinois water heater replacement · All local guides