Water Heater Replacement in Nantucket
Get fast, fair pricing from licensed local pros. Typical Nantucket cost: $1.1k – $2.6k installed.
- Tank, gas
- $1.1k – $2.6k
- Tank, electric
- $950 – $2.3k
- Tankless, gas
- $2.8k – $5.6k+
- Heat pump hybrid
- $2.3k – $5.1k
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Water heater replacement cost by type.
Installed prices for Nantucket, adjusted for local labor. Larger tanks and code upgrades move the number up.
Water heater replacement in Nantucket typically costs between $750 and $3,700, depending on the type and installation complexity. With a median home built in 1982 and cold winter inlet water, many homes need reliable units. Massachusetts requires a permit and licensed plumber or gas fitter for replacement, and expansion tanks are mandatory on closed systems since 2010. Heat pump water heaters are recommended for energy savings, with a federal 25C tax credit of up to $2,000.
- Tank, 40–50 gal gasThe default for most US homes$1,100 – $2,600
- Tank, 40–50 gal electricNo venting required$950 – $2,300
- Tankless, gasEndless hot water, higher BTU gas line often needed$2,800 – $5,600+
- Hybrid heat pumpMost efficient, qualifies for federal credits$2,300 – $5,100
- Permit & disposalMost jurisdictions require it$45 – $325
* Cold-region homes may need extra insulation or larger tanks.
Water heaters in Nantucket
U.S. Census ACS- Households
- 4,192
- Homeowners
- 2,448
- 36% own
- Median home value
- $1,182,100
- Median income
- $131,736
- Median home built
- 1982
- Housing units
- 6,854
With a median home built in 1982, many Nantucket water heaters are at or past their 8–12 year lifespan — a common reason replacements spike here.
What’s different about Nantucket.
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 Nantucket
Given Massachusetts’s cold northern climate and gas water heating, heat-pump (hybrid) is the sensible default for most Nantucket 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: Massachusetts plumbing permit and expansion tank requirements (MV Plumbing guide) · 248 CMR 10.14 Water Supply and Distribution System (Cornell LII) · EIA Massachusetts state energy data
What Nantucket code requires
Replacing a water heater in Nantucket follows Massachusetts rules under the Massachusetts State Plumbing Code (248 CMR), a state-specific code. Here’s what applies statewide:
- 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 codeMassachusetts State Plumbing Code (248 CMR), a state-specific code
- Good to know—
Water heater replacement must be done by a licensed plumber/gas fitter under a permit; expansion tanks required on closed systems since 2010.
Sources: Massachusetts plumbing permit and expansion tank requirements (MV Plumbing guide) · 248 CMR 10.14 Water Supply and Distribution System (Cornell LII) · EIA Massachusetts state energy data
Not sure which rules and rebates apply to your home?
A licensed Nantucket 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 Nantucket
Massachusetts water heating is mostly gas, which shapes the money back:
- 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; Massachusetts' main HPWH rebate is the $750 utility-administered Mass Save program, excluded here as utility-only.
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- Local pros near you
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- 1
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- 2
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- 3
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Water Heater Replacement in Nantucket, explained.
What Affects Water Heater Replacement Costs in Nantucket
Prices vary by unit type: tank gas ($750–$1,850), tank electric ($850–$2,100), tankless ($1,400–$3,300+), and heat pump ($1,700–$3,700). Labor costs reflect the need for a licensed plumber and permit fees. Older homes may require updates to meet Massachusetts plumbing code, and cold inlet water can increase demand for efficient units. Island location may affect material availability.
Common Water Heater Issues in Nantucket
Sediment Buildup
Hard water and age lead to sediment accumulation, reducing efficiency and causing noise.
Leaking Tank
Corrosion from older units (median home built 1982) can cause leaks, requiring replacement.
Inadequate Capacity
Cold winter inlet water reduces effective capacity, leading to running out of hot water.
Water Heater Replacement FAQs — Nantucket
Yes, Massachusetts requires a permit for water heater replacement, and the work must be done by a licensed plumber or gas fitter.
Water Heater Replacement near Nantucket
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