Storage tank
$1,600–$2,400Typical cost, including installation
WATER HEATER REPLACEMENT IN ST. CHARLES
St. Charles Water Heater
Replacement
Take a photo of your old water heater to start a replacement quote.
Get a water heater quotePhotos optional. No payment or booking.
See what replacement costs ↓ST. CHARLES AT A GLANCE
Replacing a water heater in St. Charles.
St. Charles issues its own water heater permits through the Building Division, for a flat $50. Plumbers need a City of St. Charles license with a bond and insurance. Utilities in St. Charles: Ameren Missouri for electric, Spire for gas. The city's water system mixes its own well water with water bought from St. Louis, with hardness around 152 mg/L.
- Permit to replace with the same type
- Yes · City of St. Charles Community Development, Building Division
- Permit fee
- $50 per water heater permit (listed under 'Miscellaneous permits' in Code Sec. 150.030, last changed by Ord. 26-021, March 3, 2026)
- Who gets the permit
- Plumbers working in the city need a two-year City of St. Charles plumber license (bond, insurance and proof of testing required). We found no city page saying whether a homeowner can pull a water heater permit.
- Electric utility
- Ameren Missouri
- Gas utility
- Spire
- Water
- City of St. Charles water utility (St. Charles PWS, MO6010707): city wells plus water bought from the City of St. Louis. The PSC locator also lists Missouri-American Water for St. Charles, so some addresses near the city may be on that system. · 152 mg/L (about 8.9 gpg) total hardness in a September 2023 sample, reported in the 2025 Annual Water Quality Report
- Rebate worth checking
- Missouri IRA Home Energy Rebates (HOMES and HEAR) (Not launched)
- Typical home
- Built 1986 (median) · 68% 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 St. Charles averages or guaranteed quotes.
Compare what each quote includes.Equipment · Labor · Permits · Old heater removalHow to compare quotes →
What we know about prices in St. Charles
- National installer’s published rangeThe ranges above. Home Depot ↗
- Local permit fee$50 per water heater permit (listed under 'Miscellaneous permits' in Code Sec. 150.030, last changed by Ord. 26-021, March 3, 2026). City of St. Charles Community Development, Building Division fee source ↗
- Local company’s advertised price1 of the companies listed for St. Charles post water heater prices or specials on their websites: Arch Plumbing. Each offer has its own conditions.
- Measured local dataNot collected yet, so no St. Charles average is shown.
What can change the price in St. Charles?
The city says any plumbing changes, electrical rewiring and electrical service changes need permits. Gas water heaters and their venting follow the International Fuel Gas Code as adopted by the city.
02 / COMPANIES WE FOUND
Who replaces water heaters in St. Charles?
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 →
Arch Plumbing
Lists St. Charles among the areas it serves. Based in Lake St. Louis, MO area (site says 'Based near Lake St. Louis'; no street address shown).
- Tank
- Tankless
- Heat pump
- Repair
- Emergency service
Published price:
What the reviews say
Water heater feedback Customers praised quick scheduling for water heater replacements, including same-day and next-morning installs, and prompt, professional technicians.
Worth knowing No water heater complaints found in the sources checked.
4 water heater reviews read, checked September 30, 2026.
What the reviews say
Water heater feedback Reviewers praised kind, knowledgeable plumbers, a temporary fix that restored hot water until replacement, and pricing they considered fair.
Worth knowing No water heater complaints found in the sources checked.
2 water heater reviews read, checked September 30, 2026.
Superior Service
Lists St. Charles among the areas it serves. Based in 101 Stag Industrial Blvd., Lake Saint Louis, MO 63367 (second location: 17722 Chesterfield Airport Rd., Chesterfield, MO 63005).
- Tank
- Tankless
- Emergency service
What the reviews say
Water heater feedback Reviewers praised a well-done gas water heater installation and a technician who caught water heater corrosion during routine maintenance.
Worth knowing A 2025 BBB complaint alleged a water heater and drain-pan install that was never tested and later let water leak into a neighbor's unit, and that Superior charged a $100 visit fee and would not correct it; Superior responded that the work was permitted, passed inspection, excluded the existing drain system, and that the overflow came from equipment it never serviced (listed as Answered).
4 water heater reviews read, checked September 30, 2026.
Order: companies based in St. Charles 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. Missouri has no statewide plumbing license (check your city or county) ↗.
See before-and-after replacement examples from independent companies →
HOMES IN ST. CHARLES
What St. Charles homes are like.
1986Median year built
38%Built before 1980
68%Owner-occupied
64%Heat with utility gas
67%Single-family homes
The median home was built in 1986. A first or second replacement is common in homes this age.
64% 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 St. Charles.
City-licensed plumbers only
Unlike many St. Louis County suburbs, St. Charles licenses its own plumbers. A plumber needs a city license, a $10,000 bond naming the city and $500,000 in liability insurance before working in the city.
Moderately hard, mixed water
The city pumps from its own wells (Wells 4–10) and also buys water from the City of St. Louis. Its 2025 report lists 152 mg/L hardness, so plan for sediment building up in tank heaters.
ENERGY & WATER
Who supplies St. Charles homes.
Energy
- Electric: Ameren Missouri
- Gas: Spire
Missouri Public Service Commission – Utility Locator ↗ · City of St. Charles FAQ – streetlight outages (Ameren) ↗
Water
City of St. Charles water utility (St. Charles PWS, MO6010707): city wells plus water bought from the City of St. Louis. The PSC locator also lists Missouri-American Water for St. Charles, so some addresses near the city may be on that system.: 152 mg/L (about 8.9 gpg) total hardness in a September 2023 sample, reported in the 2025 Annual Water Quality Report
St. Charles PWS 2025 Annual Water Quality Report (MO6010707) ↗ · Missouri Public Service Commission – Utility Locator ↗
REBATES & CREDITS
Rebates for St. Charles homes.
For Ameren Missouri and Spire customers in St. Charles. Ask installers for the price before rebates, then check with the program that you qualify.
- Missouri IRA Home Energy Rebates (HOMES and HEAR) ↗Not launchedMissouri expects about $76 million for HOMES and $75 million for electrification and appliance rebates.
- Federal Energy Efficient Home Improvement Credit (25C) ↗EndedCovered improvements made through December 31, 2025.
Checked September 30, 2026. Who qualifies and the conditions: Missouri rebates · How to check an incentive.
PERMITS & LICENSING
Permits and licenses in St. Charles.
Permits and who issues them
The Building Division lists replacing a water heater as a project that generally needs a permit. Apply on the city's online EnerGov self-service portal, and call (636) 949-3222 to schedule inspections.
Yes. Plumbers, drainlayers, electricians and HVAC contractors need a city license for July 1, 2025 to June 30, 2027. That takes a $10,000 bond in the city's favor, at least $500,000 in liability insurance, a paid St. Charles County personal property tax receipt and proof of testing (St. Charles County license or ICC test). The plumber license is $60 for two years.
City of St. Charles Community Development, Building Division ↗ · City of St. Charles – Building Division ↗ · City of St. Charles Code Ch. 150, Sec. 150.030 Schedule of Fees (Ord. 26-021, 3-3-2026) ↗ · City of St. Charles – Subcontractor Licensing ↗ · City of St. Charles Code Ch. 500 Art. X Plumbing Code ↗
Check the installer’s license
Ask for the license number and search it yourself on the Missouri has no statewide plumbing license (check your city or county) ↗. A listing on Ember & Tank is not a license check. Missouri licensing explained →
NEARBY CITIES
Compare places near St. Charles.
| City | Distance | Permit to replace | Fee | Electric |
|---|---|---|---|---|
| St. Peters | 5 mi | Required | By job value (from $25) | Ameren Missouri, Cuivre River Electric Cooperative |
| Bridgeton | 6 mi | Required | $47 | Ameren Missouri |
| Maryland Heights | 6 mi | Required | $50, | Ameren Missouri |
| Hazelwood | 6 mi | Required | $47 | Ameren Missouri |
| St. Ann | 8 mi | Required | $47 | Ameren Missouri |
| Creve Coeur | 10 mi | Required | $47 | Ameren Missouri |
COMMON QUESTIONS
St. Charles water heater questions.
Do I need a permit to replace a water heater in St. Charles?
Yes. The Building Division lists replacing a water heater as a project that generally needs a permit. Apply on the city's online permit portal and call (636) 949-3222 to schedule the inspection.
How much is the permit?
The city fee schedule lists water heater permits at $50 each (Sec. 150.030, changed March 2026).
Does my plumber need a city license?
Yes. Plumbers need a two-year City of St. Charles license, which takes a $10,000 bond, $500,000 in liability insurance and proof of testing, such as a St. Charles County license.
More guides: Missouri water heater replacement · All local guides