Storage tank
$1,600–$2,400Typical cost, including installation
WATER HEATER REPLACEMENT IN HAZELWOOD
Hazelwood Water Heater
Replacement
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See what replacement costs ↓HAZELWOOD AT A GLANCE
Replacing a water heater in Hazelwood.
In Hazelwood, the permit to replace a water heater comes from St. Louis County and costs $47. Hazelwood is served by Ameren Missouri for electricity, Spire for gas and Missouri American Water for water. The city's own occupancy inspectors look closely at the water heater: their guide checks for leaks, a metal relief-valve drain pipe ending within 6 inches of the floor, a properly sloped flue and a separate gas shutoff at the heater. Sellers and landlords are held to that checklist.
- Permit to replace with the same type
- Yes · St. Louis County Department of Transportation and Public Works (Code Enforcement) – under contract with the City of Hazelwood
- Permit fee
- $47 total for replacing a home water heater; the county waives the $47 processing fee it charges on other permits (Sec. 1100.200, Ord. 29445, adopted Nov. 5, 2025).
- Who gets the permit
- Only a master plumber or master water heater replacement specialist with a St. Louis County license, bond and insurance can get a water heater replacement permit from the county. An owner-occupant of a detached single-family home, or a close family member living with them, can instead get a homeowner permit for one water heater; they must do the job themselves and may be asked to show they're able to.
- Electric utility
- Ameren Missouri
- Gas utility
- Spire
- Water
- Missouri American Water · Total hardness 82–164 ppm (about 5–10 gpg) from Missouri River plants and 60–150 ppm (about 3.5–9 gpg) from Meramec River plants, per Missouri American Water's 2025 report; the report says the water is lime-softened
- Rebate worth checking
- Missouri IRA Home Energy Rebates (HOMES and HEAR) (Not launched)
- Typical home
- Built 1970 (median) · 59% owner-occupied
- Companies found
- 4 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 Hazelwood averages or guaranteed quotes.
Compare what each quote includes.Equipment · Labor · Permits · Old heater removalHow to compare quotes →
What we know about prices in Hazelwood
- National installer’s published rangeThe ranges above. Home Depot ↗
- Local permit fee$47 total for replacing a home water heater; the county waives the $47 processing fee it charges on other permits (Sec. 1100.200, Ord. 29445, adopted Nov. 5, 2025).. St. Louis County Department of Transportation and Public Works (Code Enforcement) – under contract with the City of Hazelwood fee source ↗
- Local company’s advertised priceNone of the local company websites we checked list a full installed price.
- Measured local dataNot collected yet, so no Hazelwood average is shown.
What can change the price in Hazelwood?
A heater bigger than 120 gallons (or over 40 kW or 140,000 BTU) is outside the home replacement rules and is billed as a mechanical permit. The county Mechanical/Fuel Gas Code covers gas piping, and any new circuit needs a county electrical permit. In Hazelwood, the city (not the county) handles building and mechanical permits on its CivicGov portal, so gas or vent changes that need a mechanical permit go to the city.
02 / COMPANIES WE FOUND
Who replaces water heaters in Hazelwood?
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 →
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.
Performance Plumbing
Lists Hazelwood among the areas it serves. Based in 1104 S Callahan Rd, Wentzville, MO 63385.
- Tank
- Tankless
- Heat pump
- Repair
What the reviews say
Water heater feedback Customers praised on-time, tidy water heater replacements at a fair price, clear explanations, and no-pressure estimates.
Worth knowing No water heater complaints found in the sources checked.
4 water heater reviews read, checked September 30, 2026.
Faszold Heating, Cooling, Plumbing & Electrical (Faszold Service Co.)
Lists Hazelwood among the areas it serves. Based in 1613 East Terra Ln, O’Fallon, MO 63366.
- 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 Hazelwood 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 Hazelwood 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) ↗.
FROM COMPANIES SERVING HAZELWOOD
Photos of water heater jobs from these companies.
HOMES IN HAZELWOOD
What Hazelwood homes are like.
1970Median year built
66%Built before 1980
59%Owner-occupied
67%Heat with utility gas
68%Single-family homes
About 66% of homes were built before 1980. Older homes often have older venting, smaller closets and shutoff valves that should be checked before install day.
67% 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 Hazelwood.
Water heater items on the occupancy checklist
Hazelwood's Residential Occupancy Inspection Guidelines, under the utility/furnace area, check the water heater for leaks, a metal relief-valve (TPR) drain pipe ending within 6 inches of the floor, and proper flue slope. Each gas appliance, including the water heater, needs its own gas shutoff valve next to it, outside the appliance cabinet and before the coupling. Occupancy inspections are good for 90 days.
City of Hazelwood: Residential Occupancy Inspection Guidelines (PDF) ↗
Rental registration
Under Hazelwood's rental registration law, every rental property must be registered with the city by January 31 each year, listing each unit, at $35 per property. Registered rentals get periodic safety inspections.
City of Hazelwood: Rental Registration Program ↗ · City of Hazelwood: Chapter 665 Rental Registration & Licensing ↗
Up to $5,000 in free home repairs
Hazelwood's federally funded Home Improvement Program, run for the city by St. Louis County, pays for up to $5,000 in home repairs at no cost to income-eligible owners who live in the home and are current on property taxes. That can help a household with a failed water heater.
ENERGY & WATER
Who supplies Hazelwood homes.
Energy
- Electric: Ameren Missouri
- Gas: Spire
Water
Missouri American Water: Total hardness 82–164 ppm (about 5–10 gpg) from Missouri River plants and 60–150 ppm (about 3.5–9 gpg) from Meramec River plants, per Missouri American Water's 2025 report; the report says the water is lime-softened
Hazelwood – Important Phone Numbers / Utility Information ↗ · Missouri American Water 2025 Water Quality Report, St. Louis County / St. Charles County (PWS MO6010716) ↗
REBATES & CREDITS
Rebates for Hazelwood homes.
For Ameren Missouri and Spire customers in Hazelwood. 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 Hazelwood.
Permits and who issues them
For a Hazelwood home, a new or replacement water heater of up to 120 gallons is a St. Louis County No-Plan Plumbing Permit. It's bought online on the county's Accela Permitting Portal, with nothing to draw up and no staff to call, and the county inspects the install afterward.
A St. Louis County license (master or journeyman) is needed for plumbers and water heater replacement specialists. A business can't advertise water heater replacement unless an owner or employee has one.
St. Louis County Department of Transportation and Public Works (Code Enforcement) – under contract with the City of Hazelwood ↗ · St. Louis County – No-Plan Plumbing Permits ↗ · St. Louis County Code Ch. 1100, Sec. 1100.200 Plumbing Inspection and Permit Fees (Ord. 29445, Nov. 5, 2025) ↗ · St. Louis County Plumbing Code, Ch. 1103 (2015 UPC with county amendments) ↗ · St. Louis County – Municipality Contract Matrix (code enforcement by county, PDF) ↗ · Hazelwood – Building Department and Code Enforcement ↗
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 Hazelwood.
| City | Distance | Permit to replace | Fee | Electric |
|---|---|---|---|---|
| Bridgeton | 2 mi | Required | $47 | Ameren Missouri |
| Florissant | 4 mi | Required | $95 | Ameren Missouri |
| St. Ann | 5 mi | Required | $47 | Ameren Missouri |
| Ferguson | 6 mi | Required | — | Ameren Missouri |
| St. Charles | 6 mi | Required | $50 | Ameren Missouri |
| Old Jamestown | 7 mi | Required (county) | $47 | Ameren Missouri |
COMMON QUESTIONS
Hazelwood water heater questions.
What does Hazelwood's occupancy inspection check on a water heater?
Leaks, a metal relief-valve drain pipe ending within 6 inches of the floor, proper flue slope, and a separate gas shutoff valve at the heater.
City of Hazelwood: Residential Occupancy Inspection Guidelines (PDF) ↗
Is there help paying for a water heater in Hazelwood?
Income-eligible owners who live in the home can apply to the city's Home Improvement Program, run by St. Louis County, for up to $5,000 in repairs at no cost.
More guides: Missouri water heater replacement · All local guides