The short answer
In eastern Massachusetts a like-for-like gas tank water heater (40–50 gallon) costs about $1,800–$3,500 installed. An indirect tank fed by your boiler runs $2,800–$4,500, a tankless conversion $4,000–$7,500, and a heat-pump water heater $3,500–$6,500 before rebates. Venting changes, gas-line upsizing, a code-required expansion tank and permit fees move the number; Mass Save rebates and the 0% HEAT Loan pull it back down on efficient units.
Cost by water heater type
These are installed ranges we quote around Lynnfield, the North Shore and Greater Boston. They include the unit, labor, standard connections, haul-away of the old heater, permit and inspection. Extras are listed in the next section.
| Type | Installed range | Typical life | Notes |
|---|---|---|---|
| Gas tank, 40–50 gal (atmospheric) | $1,800 – $3,500 | 8–12 yrs | Most common swap; chimney or B-vent |
| Gas tank, power-vent | $2,800 – $4,500 | 8–12 yrs | Side-vents in PVC; needs an outlet |
| Electric tank, 40–50 gal | $1,500 – $2,800 | 8–12 yrs | Cheapest to install, most expensive to run |
| Heat-pump (hybrid) electric | $3,500 – $6,500 | 12–15 yrs | Largest Mass Save rebates; needs space and airflow |
| Indirect tank (off the boiler) | $2,800 – $4,500 | 15–20 yrs | No burner or vent; best value in boiler-heated homes |
| Tankless gas (condensing) | $4,000 – $7,500 | 18–20 yrs | Includes typical gas/vent changes; see the tank vs. tankless guide |
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What adds to the bill
- Venting changes. If the old heater shared the chimney with a boiler that has since gone high-efficiency, the chimney may need a liner ($800–$1,800) or the new heater needs to be a power-vent model.
- Gas line upsizing. Tankless units burn up to 199,000 BTU; many older homes need a larger line from the meter ($500–$1,500).
- Expansion tank. Massachusetts code requires one when the house has a pressure-reducing valve or backflow preventer. About $150–$300 if it is missing.
- Drain pan and leak shut-off. Recommended wherever a leak would damage finished space: $50–$200 for a pan, more for an automatic shut-off valve.
- Relocation or access. Moving the heater, a tight crawlspace, or a unit that has to come up basement stairs in an older Boston triple-decker adds labor.
- Code updates. A new shut-off valve, dielectric unions, a proper T&P discharge line and seismic strapping where required are small items that an honest estimate includes rather than surprises you with.
Mass Save rebates and 0% financing
Massachusetts homeowners on a participating gas or electric utility can usually claim a Mass Save rebate on qualifying high-efficiency equipment — heat-pump water heaters draw the largest amounts, condensing tankless and high-efficiency indirect units also qualify in many years — and finance the balance through the Mass Save HEAT Loan at 0% interest. Rebate tiers change annually, so we confirm the current figures when we quote and handle the paperwork with you. In practice the rebate often closes most of the gap between a basic tank and the efficient option.
Repair or replace?
- Under 8 years old, failed part (thermocouple, gas valve, heating element, thermostat, T&P valve) — repair. These are routine, $150–$450.
- Leaking from the tank body — replace. There is no repair for a corroded tank.
- 10+ years old and any significant repair — replace. You would be spending several hundred dollars to keep a unit that is on its last two or three winters.
- Rusty hot water, rumbling, lukewarm output — sediment and end of life; start planning before it picks a Sunday in January.
Not sure which side of the line you are on? Our guide to a leaking water heater walks through the four leak locations and what each means.
How long it takes
- Quote. A photo of the existing unit and its data plate is usually enough for a firm price on a like-for-like swap; conversions get a short site visit.
- Install. A standard tank is two to four hours and often same day. Tankless, indirect and heat-pump installs are a half to full day and typically next day.
- Permit and inspection. Filed by us; the inspector signs off and we register the warranty.
Precision Plumbing Solutions installs and replaces every type above across Essex, Middlesex, Suffolk, Norfolk and Plymouth Counties — see water heater installation and repair. If you are weighing a tankless conversion, read tank vs. tankless for Massachusetts homes first; if the boiler is due as well, boiler replacement cost covers pairing an indirect with a new boiler.
Questions people ask
How long does a water heater last in Massachusetts?
Tank-type gas and electric heaters typically last 8 to 12 years here; hard water on parts of the North Shore shortens that. Tankless units run 18 to 20 years with annual descaling, indirect tanks 15 to 20.
Do I need a permit to replace a water heater in Massachusetts?
Yes. A plumbing permit (and a gas permit for gas units) is required and the work is inspected. A licensed plumber files it; the fee is a modest line on the estimate.
Can I replace a water heater the same day it fails?
Usually yes for a standard 40 or 50 gallon tank — they are stocked locally. Tankless, indirect and heat-pump units are typically next-day.
Is a heat-pump water heater worth it?
On electric, often yes: it uses about a third of the electricity of a standard electric tank, and Massachusetts rebates on qualifying units are among the largest in the country. It needs a space that stays above about 40°F and has room for airflow, which rules out some closets.
