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Water Heater Repair & Replacement in St. Louis, MO

Compare 3 local water heater repair & replacement pros. Typical service: $241–$845.

Top Water Heater Repair & Replacement Companies in St. Louis

  1. 1.Python Plumbing, LLC

    5.0★ (79 reviews)

    5.0★ from 79 reviews

    +13143699980Website

  2. 2.R.A. Guinner Plumbing Company

    4.8★ (45 reviews)

    4.8★ from 45 reviews

    +13147529850Website

  3. 3.Ron's Plumbing & Sewer Service

    4.2★ (41 reviews)

    4.2★ from 41 reviews

    +13147521101

Water Heater Repair & Replacement Cost in St. Louis

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in St. Louis
Water heater repair$241–$845/job
Tank water heater replacement$1,448–$3,018/job
Tankless water heater install$2,414–$6,035/job
Flush and maintenance$121–$302/visit

Water Heater Repair & Replacement prices in St. Louis run about 21% above the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.

Quotes on this page come from 3 companies serving St. Louis, rated 4.7★ on average across 165 customer reviews.

St. Louis Climate & Seasonal Timing

What St. Louis's weather means for scheduling water heater repair & replacement.

Last spring frost
April 2
First fall frost
November 4
Annual precipitation
43.03"
Heating degree days
4,471
Cooling degree days
1,678
MonthLowHighPrecip
Jan23.8°39.8°2.45"
Feb27.8°45.1°2.39"
Mar37°55.4°3.36"
Apr47.3°67°4.1"
May57.4°76.8°4.8"
Jun66.7°85.3°4.34"
Jul71°89.1°4.19"
Aug69.7°88.1°3.41"
Sep61.1°80.8°3.38"
Oct49.5°68.9°3.43"
Nov39.3°55.9°4.22"
Dec28.1°42.9°2.96"

NOAA station data 1.45 miles from St. Louis.

Permits & Regulations in MO

Permit typically required

  • Missouri has no statewide plumbing license — licensing is handled by cities and counties
  • Kansas City and St. Louis each run their own plumber licensing and permitting programs
  • Pesticide work is the trade Missouri does regulate at state level, through the Department of Agriculture

License required: Local city or county plumbing license (no statewide license)

Sources: www.mo.gov

Water Heater Repair & Replacement FAQs for St. Louis

How much does water heater repair cost in St. Louis?

Water heater repair in St. Louis typically runs $241-$845; full tank replacement costs considerably more.

How many water heater pros serve St. Louis?

We track 3 water heater specialists and plumbers serving St. Louis.

Do I need a permit to replace a water heater in St. Louis, MO?

In MO, Missouri has no statewide plumbing license — licensing is handled by cities and counties. Water heater replacement commonly requires a permit in St. Louis because of gas, venting and relief-valve requirements.

Is water heater work in St. Louis more expensive than average?

Water heater work in St. Louis runs about +20.7% versus the national average.

Why does my water heater struggle in St. Louis winters?

When St. Louis lows reach 24F, incoming water is much colder, so a tank takes longer to recover and a heater with sediment or a weak element runs out of hot water sooner.

Is a tankless water heater worth it in St. Louis?

St. Louis averages 4,471 heating degree days a year. The colder the incoming water, the larger a tankless unit has to be to keep up with showers, which drives its price.

How often should a water heater be flushed in St. Louis?

Once a year is standard in St. Louis; flushing removes sediment that shortens tank life. Repairs caught early typically cost $241-$845.

Does summer heat affect water heaters in St. Louis?

Less than winter: with highs near 89F in St. Louis, incoming water is warm and heaters work least, which is why summer is a good time to schedule a replacement.