How much does a water heater replacement cost in Saint Peters, MO?
US national rangeUpdated Prices checked October 20262 sources
A water heater replacement costs $882 to $1,826 nationally, typical $1,348. We have no documented price index for Saint Peters for this job, so this is the US national range from HomeAdvisor, checked October 2026.
US national range, not adjusted for this city
- Low
- $882
- Typical
- $1,348
- High
- $1,826
Water heater replacement cost in Saint Peters, MO
We have no documented price index for Saint Peters for this job, so the table shows the US national range.
| Estimate | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| US national range | $882 | $1,348 | $1,826 | Per unit, installed (unit plus labor); typical range of customer-reported jobs (HomeAdvisor) | October 2026 |
Water heater replacement cost by type or size
US national figures in USD, as published by each source.
| Type or size | Price (USD) | Source |
|---|---|---|
| 40-gallon tank, installed | $550 to $2,300 | Fixr |
| 50-gallon tank, installed | $700 to $2,500 | Fixr |
What drives the cost of a water heater replacement
Type of heater
Tank, tankless, heat pump and solar units differ widely in price.
Tank size
A 50-gallon tank costs more than a 40-gallon tank.
Fuel source
Switching fuel, or adding gas lines or electrical circuits, raises the cost.
Venting and code upgrades
Power venting, expansion tanks and code fixes add parts and labor.
Labor and access
Labor is about half the total; tight closets and attics take longer.
Permits and what's included in Saint Peters
Permit note
Most areas require a plumbing permit. A standard permit runs about $25 to $300, and a separate gas permit, if needed, about $50 to $300.
Rules are set locally; confirm with Saint Peters’s building department.
What’s usually included
- The new water heater
- Labor to disconnect the old unit and connect the new one
- Removal of the old unit (often included; confirm on the quote)
Scopes vary. Get the scope in writing on every quote.
Get water heater replacement quotes in Saint Peters
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Top-ranked plumbers in Saint Peters
The top 3 of 255 plumbers we rank for Saint Peters, MO, by CR Score. Paid placement never changes rank.
- #1Roto-Rooter Plumbing & Water CleanupCR Score 644.9from 1,738 Google reviews
- #2Roto-Rooter Plumbing & Water CleanupCR Score 644.9from 2,557 Google reviews
- #3Roto-Rooter Plumbing & Water CleanupCR Score 644.8from 4,983 Google reviews
Water heater replacement cost in Saint Peters: questions
How much does a water heater replacement cost in Saint Peters, MO?
Do I need a permit for a water heater replacement in Saint Peters?
What affects the cost of a water heater replacement?
How many plumbers serve Saint Peters?
What is usually included in the price?
Sources
Checked October 2026. Figures are estimates, not quotes.
- HomeAdvisor: Water heater installation cost · page updated June 17, 2026 · checked October 2026Primary source. Used for: Low, typical and high; drivers; permit.
- Fixr: Water heater installation cost · page updated January 27, 2026 · checked October 2026Used for: Prices by tank size; cross-check: $900 to $3,000, average $1,400 for a gas tank.
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