Why We Don't Post a Single Number

Water Heater Replacement Cost Depends on Your Home

Most same day hot water heater replacements on Long Island land between $2,190 and $3,490. Where you fall in that range depends on the unit you pick (gas tank, electric, hybrid heat pump, or tankless), the tank size (40, 50, 75, or 80 gallon), the venting setup, and any code corrections your install needs.

Two houses on the same Levittown block can have wildly different water heater replacement costs based on which unit fits the basement, how the venting runs, what shape the gas line is in, and whether the existing setup is up to current Nassau or Suffolk plumbing code. Rather than post a single dollar figure that will not match your actual install, we quote your specific house. Tell us a few things on the phone and we will pinpoint your number within minutes.

Ready when you are. Call (631) 898-5780 for your quote.

Water heater replacement cost quote on Long Island by Domino Home Services

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Typical Install Range

Same Day Hot Water Heater Replacement: $2,190 – $3,490

That's the range most Long Island homeowners pay for a full, code-compliant water heater replacement: unit, install, permit, and old-unit haul-away included. Your exact number depends on water heater type, tank size, venting, and any code corrections.

40 / 50 / 75 gal tanks Gas, electric, hybrid Permit included 1-year labor warranty

Call for Your Quote See Financing →

$2,190

Starting Range

Tank replacementLow end

Hybrid heat pumpHigher (rebate-eligible)

Tankless retrofitQuoted separately

Code correctionsAs-needed

Cost Factors

What Goes Into the Water Heater Replacement Cost

Half a dozen real-world factors drive the final water heater replacement cost on Long Island. Here is what we look at when we put a quote together.

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Water Heater Type

Atmospheric gas tank, power vent gas, electric tank, hybrid heat pump, and tankless all sit at different points on the cost spectrum. Hybrid heat pump units cost more upfront but qualify for the biggest PSEG-LI rebates and the federal heat pump tax credit.

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Tank Size or GPM

40, 50, 75, or 80 gallon storage tank sizes have different price tiers. For tankless, the flow rate (GPM) you need affects the model and the gas line work. See our sizing guide.

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Venting & Combustion Air

Atmospheric venting through a chimney is the cheapest. Power vent through the wall costs more (longer vent run, 120V outlet). Tankless needs stainless or PVC venting sized to the unit. Older Long Island homes occasionally need combustion air work.

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Code Corrections

If your existing setup is below current Nassau or Suffolk plumbing code (no expansion tank, undersized T&P discharge piping, missing sediment trap, wrong gas connector), those corrections are part of the install. We tell you about them before doing them.

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Gas Line & Electrical

Tankless retrofits often need gas line upsizing from 1/2 inch to 3/4 inch and a 120V outlet. Hybrid heat pump units need a 240V outlet. Adding either to a finished basement is more involved than to an unfinished one.

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Brand Tier

Standard 6-year warranty tank versus a premium 10 to 12 year tank. Atmospheric versus condensing tankless. Brands we install →

What's Included

Every Water Heater Quote Includes the Full Install

Our water heater replacement quotes are all-in. No surprise add-ons mid-job.

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Unit & Standard Fittings

Brand new water heater, manufacturer warranty registered in your name on install day, expansion tank if required by code, T&P (temperature and pressure) valve, sediment trap on gas connections, new flexible water supply lines, and standard fittings.

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Permit & Code Compliance

Permit pulled with your town or village. Install meets Nassau or Suffolk plumbing code. Combustion air, venting (atmospheric flue, power vent, or condensing PVC), and gas connections all to code.

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Old Unit Haul-Away

Drained, disconnected, hauled to our truck, and recycled. No leaving the old water heater on the curb, no second-trip charges.

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Labor Warranty

1-year labor warranty on our install plus the full manufacturer warranty on the unit (6 to 15 years depending on model). See the warranty page for full terms.

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Same Day or Next Day

Trucks roll out of Hauppauge with the common tank sizes already on board. Most before-noon calls get installed same day. Otherwise, next-day appointment scheduling.

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Financing if You Want It

Pay monthly through Wisetack. Soft credit pull, APRs from 0%, terms 3 to 60 months. See the financing page.

Lower the Net Cost

Stack Rebates & Financing on Your Replacement

The total out-of-pocket water heater replacement cost on Long Island can drop substantially when you combine the right unit with active rebates and Wisetack financing.

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PSEG & National Grid Rebates

Heat pump water heaters qualify for hundreds in PSEG Long Island rebates. High-efficiency gas units can pick up National Grid incentives. See programs →

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Federal Tax Credit

Heat pump water heaters earn a 30% federal tax credit under the Inflation Reduction Act, capped at $2,000 per tax year. Applied on your tax return.

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Wisetack Monthly Payments

Spread the cost over 3 to 60 months. APRs from 0% for qualified buyers. No prepayment penalty. See financing →

The math we run for you: when we quote a heat pump water heater install, we factor in the PSEG-LI rebate and the federal tax credit so you see the net cost, not the gross. If financing makes more sense than paying upfront, we show you the monthly figure too. The goal is a real number you can plan around.

Cost FAQs

Water Heater Replacement Cost Questions We Get Every Day

Why don't you list water heater replacement prices on your website?

Because a single posted number would be misleading. The water heater replacement cost on Long Island depends on the unit type (gas, electric, hybrid, tankless), the tank size (40, 50, 75, or 80 gallon), the venting setup, the existing gas and water connections, and whether any code corrections are needed. We give you a real range over the phone in 3 minutes after a few quick questions.

Are estimates and quotes free?

Yes. Phone quotes are free, and we are accurate over the phone after we ask the right questions. On-site estimates are also free if your situation needs eyes on it (unusual install location, custom venting, code corrections suspected).

Do you offer same day water heater installation?

Most calls placed before noon get a brand new water heater installed the same day. Our trucks already carry the most common tank sizes (40, 50, and 75 gallon) plus standard fittings, so we are not waiting on a supplier. Calls later in the day or for less common units typically get next-day installation.

What payment methods do you accept?

Cash, check, all major credit cards, and Wisetack financing for monthly payments. Payment is due upon completion of work unless other terms are agreed in writing. See our financing page for monthly payment options.

Are there any hidden fees?

No. Permit, haul-away of the old unit, standard fittings, expansion tank, T&P valve, and 1-year labor warranty are all included in the quoted price. The only items that can change the cost are code corrections (if your existing setup is below code) or unusual install conditions (rerouting gas, electrical, or venting). We discuss those before doing the work, not after.

Do you offer warranty work after the install?

Yes. Every install includes a 1-year labor warranty from us plus the full manufacturer warranty on the unit (6 to 15 years depending on model). If anything goes wrong, you call the same phone number. Details on the warranty page.

Can rebates be applied at install time, or do I get them after?

It depends on the program. Most utility rebates (PSEG-LI, National Grid) are mailed to you as a check after the install paperwork is processed. The federal heat pump tax credit comes back on your tax return the following year. We file the utility paperwork on your behalf so you do not have to chase it.

What if I just need a repair, not a full replacement?

We diagnose first and tell you straight whether repair or replacement makes sense. Common repairs (thermocouple, heating element, T&P valve, anode rod) are often cheaper than a full water heater replacement. See our repair vs replace guide for the framework we use.

Decide What You're Buying

Types

Water Heater Replacement Cost on Long Island