GallonGaugeGallons, first-hour rating and GPM — the three numbers that decide it.

How much does a water heater replacement cost in Charleston, SC?

A 75-gallon gas water heater replacement in Charleston, SC
$2,648
three or more bathrooms drawing at once · typical range $1,917 – $4,017
Typical totalinstalled, 75 gallon gas$2,648
Range you should see in bidsthree bids on the same scope normally land inside this$1,917 – $4,017
Labor portion45% of the job — this is the part that moves by city$1,191
Material portion55% — bought at national prices$1,456
Plumbers, Pipefitters, and Steamfitters pay near Charlestonabout $28/hr · Charleston-North Charleston, SC metro$58,210/yr
U.S. mean for the same tradeSOC 47-2152$72,170/yr
Versus the national pricetrade pay here runs −19.3% against the U.S. mean−$252

Notes

  • Where the number comes from. The national price for a 75-gallon gas water heater replacement is $2,900 installed — water heater replacement pricing published for 2026, unit plus installation. Labor is about 45% of that. Plumbers, Pipefitters, and Steamfitters near Charleston, SC average $58,210 a year against a U.S. mean of $72,170 — a factor of 0.807 — so the labor half is scaled by that and the material half is not. Source: BLS OEWS May 2025 for the Charleston-North Charleston, SC metro area, SOC 47-2152.
  • Why the city matters, not just the state. Trade pay moves inside a state as much as it does between states. Crews do not commute across a state to bid a job, and materials ship at national prices either way — so a metro wage is the honest input here and a state average quietly rounds four different cities into one number.
  • What is in the price: the heater, removal and disposal of the old one, new flex connectors, a drain pan, an expansion tank where code requires it, and labor.
  • What is not: a gas line upsize, new venting, an electrical circuit for an electric unit, and bringing an old install up to current code. These are the lines that turn a $2,648 quote into a $3,309 invoice, so ask about each one before signing.
  • Use this as a bid check, not a quote. It prices an average job in average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a national average for the job.

a 75-gallon gas water heater replacement in Charleston, SC

$2,648 is the typical number, and three bids on the same scope normally land between $1,917 and $4,017.

That is $252 less than the same job priced at the national average.

Why the city changes the number

About 45% of this job is labor — $1,191 of the $2,648 above. Labor is the only part that moves locally; a bundle of material costs what it costs wherever it is nailed down.

Plumbers, Pipefitters, and Steamfitters near Charleston average $58,210 a year, against a U.S. mean of $72,170. That is a factor of 0.807, so the labor half is scaled by it and the material half is not.

Source: BLS OEWS May 2025 for the Charleston-North Charleston, SC metro area, SOC 47-2152.

What the quote should include

The lines that turn a quote into an invoice

Ask about each of them before you sign. On a job this size they are the difference between $2,648 and something a quarter higher.

Use it as a bid check, not a quote

This prices an average job in average condition. Access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a national average.

If a bid lands outside $1,917 – $4,017, that is not automatically wrong — but it is the question worth asking out loud.

Nearby sizes

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