New Water Heater Cost (Including Installation)
Updated February 25, 2026
The unit is only half the cost. Installation labor, permits, disposal of the old unit, and code-required upgrades (expansion tank, new gas line, electrical work) make up the rest. A $500 tank water heater becomes a $1,200 installed job. A $1,200 tankless unit becomes a $3,500 installed job. Knowing what to expect prevents sticker shock and helps you compare quotes accurately.
Overview
The unit is only half the cost. Installation labor, permits, disposal of the old unit, and code-required upgrades (expansion tank, new gas line, electrical work) make up the rest. A $500 tank water heater becomes a $1,200 installed job. A $1,200 tankless unit becomes a $3,500 installed job. Knowing what to expect prevents sticker shock and helps you compare quotes accurately.
Cost Breakdown
Gas Tank Water Heater (Like-for-Like Replacement)
Unit cost: $400-$1,200 for a standard 40-50 gallon gas tank. Installation labor: $300-$800. Total installed: $700-$2,000. This is the most straightforward scenario -- disconnect the old one, set the new one in the same spot, reconnect water, gas, and vent. Most plumbers complete this in 2-3 hours. Add $40-$100 for an expansion tank if your system has a check valve or PRV (required by code in most areas). Add $50-$150 for the permit. Old unit disposal: $25-$75 or included in some plumber quotes.
Electric Tank Water Heater
Unit cost: $300-$900 for a standard 40-50 gallon electric tank. Installation labor: $200-$600 (simpler than gas -- no venting, no gas line). Total installed: $500-$1,500. Electric installs are faster because there is no gas connection or vent pipe. The electrician verifies the dedicated 240V circuit and wire gauge. If the existing circuit is adequate, installation takes 1-2 hours. If the circuit needs upgrading (old homes with undersized wiring), add $200-$500 for electrical work.
Tankless Water Heater (Gas)
Unit cost: $800-$2,500. Installation labor: $1,000-$2,500 (first-time install is the expensive part). Total installed: $2,000-$5,000. Why so much labor? A gas tankless typically needs a larger gas line ($200-$600 to upsize), new category III or IV stainless steel venting ($200-$500), a condensate drain ($50-$150), and sometimes electrical work for the control board ($100-$200). Replacing an existing tankless with a new one is much cheaper -- $1,500-$3,000 total because the infrastructure is already in place.
Heat Pump Water Heater
Unit cost: $1,200-$2,500. Installation labor: $400-$800 (similar to standard electric). Total installed: $1,800-$3,500 before incentives. The installation is straightforward if you already have a 240V circuit and adequate space. The federal tax credit covers 30% of the total cost (up to $2,000). Many states and utilities add $200-$500 in additional rebates. After incentives, a $2,500 installed heat pump may net out to $1,500-$1,800 -- comparable to a standard electric tank with dramatically lower operating costs.
What Drives Cost Up
Code upgrades are the hidden cost. Expansion tank ($40-$100 installed) is required in most jurisdictions when a PRV or check valve is present. Earthquake straps ($15-$40) are required in seismic zones. Drain pan ($20-$40) is required when the heater is above finished living space. Permit fees run $50-$300. Gas line upsizing for tankless ($200-$600). Electrical panel upgrade for electric tankless ($500-$2,000). Old unit disposal ($25-$75). These add $200-$1,000+ to the base installation price.
Safety Warnings
- Comparing unit prices without including installation. A $500 gas tank and a $1,200 tankless look like a $700 difference -- but installed, the gap is $1,500-$3,000.
- Forgetting about the federal tax credit on heat pump water heaters. The 30% credit makes them cost-competitive with standard electric after incentives.
Pro Tips
- Get at least three written quotes that itemize: unit cost, labor, permit fee, disposal, and any code upgrades. Compare apples to apples.
- Ask if the plumber's warranty covers the labor if the unit fails within the manufacturer's warranty period. Some do, some charge a second service call.
- Buy the unit yourself to save 10-20% vs the plumber's markup -- but some plumbers will not warranty labor on units they did not supply. Ask first.
- Emergency replacement costs 20-40% more than planned replacement. If your heater is 8-10 years old, start shopping now while you have time to compare.
Mistakes to Avoid
- Comparing unit prices without including installation. A $500 gas tank and a $1,200 tankless look like a $700 difference -- but installed, the gap is $1,500-$3,000.
- Not asking about code-required upgrades before signing the quote. An expansion tank, permit, and disposal can add $200-$400 that was not in the original estimate.
- Choosing the cheapest quote without verifying the plumber is licensed and insured. Unlicensed work voids manufacturer warranties and creates liability.
- Forgetting about the federal tax credit on heat pump water heaters. The 30% credit makes them cost-competitive with standard electric after incentives.
Bottom Line
Gas tank replacement: $700-$2,000 installed. Electric tank: $500-$1,500. Gas tankless: $2,000-$5,000. Heat pump: $1,800-$3,500 before tax credits. The unit is half the cost -- labor, permits, and code upgrades make up the rest. Get three quotes, verify they include everything, and plan the replacement before the old one fails.
Frequently Asked Questions
What are expert tips for new water heater cost (including installation)?
Get at least three written quotes that itemize: unit cost, labor, permit fee, disposal, and any code upgrades. Compare apples to apples. Ask if the plumber's warranty covers the labor if the unit fails within the manufacturer's warranty period. Some do, some charge a second service call. Buy the unit yourself to save 10-20% vs the plumber's markup -- but some plumbers will not warranty labor on units they did not supply. Ask first. Emergency replacement costs 20-40% more than planned replacement. If your heater is 8-10 years old, start shopping now while you have time to compare.
What mistakes should I avoid with new water heater cost (including installation)?
Comparing unit prices without including installation. A $500 gas tank and a $1,200 tankless look like a $700 difference -- but installed, the gap is $1,500-$3,000. Not asking about code-required upgrades before signing the quote. An expansion tank, permit, and disposal can add $200-$400 that was not in the original estimate. Choosing the cheapest quote without verifying the plumber is licensed and insured. Unlicensed work voids manufacturer warranties and creates liability. Forgetting about the federal tax credit on heat pump water heaters. The 30% credit makes them cost-competitive with standard electric after incentives.
What is the bottom line on new water heater cost (including installation)?
Gas tank replacement: $700-$2,000 installed. Electric tank: $500-$1,500. Gas tankless: $2,000-$5,000. Heat pump: $1,800-$3,500 before tax credits. The unit is half the cost -- labor, permits, and code upgrades make up the rest. Get three quotes, verify they include everything, and plan the replacement before the old one fails.
What's the bottom line on new water heater cost (including installation)?
Gas tank replacement: $700-$2,000 installed. Electric tank: $500-$1,500. Gas tankless: $2,000-$5,000. Heat pump: $1,800-$3,500 before tax credits. The unit is half the cost -- labor, permits, and code upgrades make up the rest. Get three quotes, verify they include everything, and plan the replacement before the old one fails.
How much does new water heater cost (including installation) cost?
The typical cost range is $500-$5,000 depending on type and installation complexity. Actual costs depend on your location, materials, and whether you hire a professional.