Water heater replacement & repair in New Hampshire
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What it costs across New Hampshire
Water Heater Replacement
Water heater replacement cost depends on the unit type, size, fuel source, and what code upgrades the job triggers. A basic 40-gallon gas tank swap and a high-efficiency tankless install can sit nearly $4,000 apart.
Water Heater Installation
Water heater installation cost covers the labor and parts to fit a new unit — whether it's a first-time install, a fuel switch, or a tankless conversion. The number swings with venting, gas-line work, and whether the location changes.
Water Heater Repair
Water heater repair cost depends on the failing part and whether the unit is gas or electric. Most common repairs — thermostats, elements, thermocouples, valves — land between $150 and $800 including labor.
* Statewide medians — open a city for locally adjusted pricing.
What’s different about New Hampshire.
Generic cost pages skip the things that actually decide your price and your unit’s lifespan here — local code, water, and the money you can claim back.
Recommended unit for New Hampshire
Given New Hampshire’s cold northern climate and electric water heating, heat-pump (hybrid) is the sensible default for most New Hampshire homes. Winter inlet water runs cold here, so recovery rate matters — size up a tankless or favor a high-recovery tank. A pro can confirm the right size and fuel for your home.
Sources: NH Department of Energy - Home Electrification and Appliance Rebates · New Hampshire Plumbing Code 2018 (based on IPC 2018) - UpCodes · New Hampshire Plumbing Code Chapter 5 Water Heaters - UpCodes
What New Hampshire code requires
Across New Hampshire, replacing a water heater means meeting these statewide rules under the International Plumbing Code (IPC), state-amended as the NH Plumbing Code:
- PermitRequired
Pulled by your licensed plumber; covers gas/venting and the expansion tank.
- Seismic strappingNot required
No state strapping mandate — one less line on the bill.
- Expansion tankRequired on closed systems
Required where a pressure regulator or backflow preventer is present.
- Plumbing codeInternational Plumbing Code (IPC), state-amended as the NH Plumbing Code
- Good to know—
New Hampshire requires plumbing work, including water heater replacement, to be performed by a state-licensed plumber, with a permit and inspection.
Sources: NH Department of Energy - Home Electrification and Appliance Rebates · New Hampshire Plumbing Code 2018 (based on IPC 2018) - UpCodes · New Hampshire Plumbing Code Chapter 5 Water Heaters - UpCodes
Not sure which rules and rebates apply to your home?
A licensed New Hampshire pro will walk you through code, the right unit, and what you can claim back — in one quick call.
No obligation — talk through your options.
Money back in New Hampshire
New Hampshire water heating is mostly electric, which shapes the money back:
- StateUp to $1,750 (income-qualified; program launching mid-2026)NH Home Electrification and Appliance Rebates (HEAR) Program - heat pump water heater →
State-level program — verify eligibility before you buy.
- Federal30% of cost, up to $2,000Federal 25C tax credit →
For a qualifying ENERGY STAR heat pump water heater. Claimed on your federal return.
The federal 25C tax credit (30%, up to $2,000 for a heat pump water heater) applies in every state, including New Hampshire.
Ready to get your water heater fixed in New Hampshire?
Speak with a licensed, insured water heater pro near you. Upfront pricing, same-day availability, no obligation.
- Licensed & insured
- Same-day availability
- Upfront, no-pressure pricing
- Local pros near you
No obligation — talk through your options.
All 15 New Hampshire cities
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Hot water back in three steps.
- 1
Tell us what’s wrong
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- 2
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We connect you with a licensed, insured water heater specialist near you — often the same day.
- 3
Repair or replace, fast
Your pro confirms the price on-site and gets your hot water back. Most jobs done in a few hours.
Water heater FAQs — New Hampshire
In New Hampshire, a plumbing permit is generally required for a water heater replacement. Your licensed plumber pulls it; it covers the gas/venting and expansion tank.
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