Storage tank
$1,600–$2,400Typical cost, including installation
WATER HEATER REPLACEMENT IN JENNINGS
Jennings Water Heater
Replacement
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See what replacement costs ↓JENNINGS AT A GLANCE
Replacing a water heater in Jennings.
Jennings runs its own Building Department for plumbing permits. You apply by email, and inspections follow the 2018 International Plumbing Code with city changes made in 2020. Those changes require a floor drain within 15 feet of a water heater, and a drain pan when the heater sits above the basement. Jennings is on Ameren Missouri power, Spire gas and Missouri American Water.
- Permit to replace with the same type
- Yes · City of Jennings Building Department
- Who gets the permit
- A plumber licensed under St. Louis County's Chapter 1103 rules (the application asks for the St. Louis County license number). City code also allows a homeowner permit for a detached single-family home the owner lives in, if the owner or a family member living there does all the work.
- Electric utility
- Ameren Missouri
- Gas utility
- Spire
- Water
- Missouri American Water · Total hardness 82–164 ppm (about 5–10 gpg) from Missouri American's Missouri River plants and 60–150 ppm (about 3.5–9 gpg) from its Meramec River plant, per the 2025 report; the report does not say which plant serves which neighborhood.
- Rebate worth checking
- Missouri IRA Home Energy Rebates (HOMES and HEAR) (Not launched)
- Typical home
- Built 1955 (median) · 45% owner-occupied
- Companies found
- 2 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 Jennings averages or guaranteed quotes.
Compare what each quote includes.Equipment · Labor · Permits · Old heater removalHow to compare quotes →
What we know about prices in Jennings
- National installer’s published rangeThe ranges above. Home Depot ↗
- Local company’s advertised priceNone of the local company websites we checked list a full installed price.
- Measured local dataNot collected yet, so no Jennings average is shown.
What can change the price in Jennings?
The city has separate electrical and mechanical permit applications, so a new circuit or gas or vent work may need its own permit.
02 / COMPANIES WE FOUND
Who replaces water heaters in Jennings?
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 →
Superior Service
Lists Jennings 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.
Roto-Rooter Plumbing & Water Cleanup (St. Louis)
Lists Jennings 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 Jennings 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 JENNINGS
What Jennings homes are like.
1955Median year built
83%Built before 1980
45%Owner-occupied
75%Heat with utility gas
80%Single-family homes
About 83% of homes were built before 1980. Older homes often have older venting, smaller closets and shutoff valves that should be checked before install day.
75% of homes heat with utility gas, so gas water heaters with existing venting are common here.
Only 45% of homes are owner-occupied. Renters should ask the landlord or property manager; replacing the heater is usually the owner’s decision.
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 Jennings.
Floor drain near the water heater
Jennings' plumbing rules require a floor drain within 15 feet of a water heater, in the same room. The city's property maintenance code says the same thing.
Jennings Code Ch. 28 Plumbing, §§28-16–28-17 (2018 IPC, Ord. 2532, Jan. 27, 2020) ↗
Drain pan when the heater isn't in the basement
A water heater in an attic, a framed-in space, or anywhere above the ground or basement floor without a floor drain needs a watertight, corrosion-resistant pan with a drain at least 1¼ inches wide running to an approved drain.
Jennings Code Ch. 28 Plumbing, §§28-16–28-17 (2018 IPC, Ord. 2532, Jan. 27, 2020) ↗
ENERGY & WATER
Who supplies Jennings homes.
Water
Missouri American Water: Total hardness 82–164 ppm (about 5–10 gpg) from Missouri American's Missouri River plants and 60–150 ppm (about 3.5–9 gpg) from its Meramec River plant, per the 2025 report; the report does not say which plant serves which neighborhood.
Missouri PSC Utility Locator ↗ · Missouri American Water 2025 Water Quality Report, St. Louis County / St. Charles County ↗
REBATES & CREDITS
Rebates for Jennings homes.
For Ameren Missouri and Spire customers in Jennings. 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 Jennings.
Permits and who issues them
Jennings issues its own plumbing permits, and its plumbing permit application has a line for water heaters. Email the application to BuildingDepartment@cityofjennings.org, and call 314-388-1164 at least 24 hours ahead to book inspections. The city enforces the 2018 International Plumbing Code with local changes.
We found no separate city plumber license, but the application has a 'contractor license fee' line and asks for the St. Louis County license number.
City of Jennings Building Department ↗ · Jennings – Building Permit Applications ↗ · Jennings – Plumbing Permit Application (PDF) ↗ · Jennings Code Ch. 28 Plumbing, §§28-16–28-17 (2018 IPC, Ord. 2532, Jan. 27, 2020) ↗
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 Jennings.
| City | Distance | Permit to replace | Fee | Electric |
|---|---|---|---|---|
| Ferguson | 2 mi | Required | — | Ameren Missouri |
| Bellefontaine Neighbors | 3 mi | Required | $47 | Ameren Missouri |
| University City | 5 mi | Required | — | Ameren Missouri |
| Spanish Lake | 5 mi | Required (county) | $47 | Ameren Missouri |
| Overland | 6 mi | Check with city | $60 | Ameren Missouri |
| St. Louis | 6 mi | Required | $30 | Ameren Missouri |
COMMON QUESTIONS
Jennings water heater questions.
Who issues water heater permits in Jennings?
The City of Jennings Building Department. Its plumbing permit application has a water heater line, and you send it by email.
Jennings – Building Permit Applications ↗ · Jennings – Plumbing Permit Application (PDF) ↗
Can a homeowner get the permit?
Yes, for a detached single-family home the owner lives in, if the owner or a family member living there does all the work. The code official may ask for proof you can do it.
Jennings Code Ch. 28 Plumbing, §§28-16–28-17 (2018 IPC, Ord. 2532, Jan. 27, 2020) ↗
Is there a special drain rule?
Yes. Jennings requires a floor drain within 15 feet of the water heater in the same room, or a drain pan if the heater is above the basement with no floor drain.
Jennings Code Ch. 28 Plumbing, §§28-16–28-17 (2018 IPC, Ord. 2532, Jan. 27, 2020) ↗
More guides: Missouri water heater replacement · All local guides