Water Heater Installation Cost Calculator

For a straightforward same-type replacement by a licensed pro, expect about $2,050 for a 50-gallon electric tank (typical range $1,300 – $3,050), $2,300 for a 50-gallon gas tank (range $1,500 – $3,350), $4,650 for a gas tankless unit with new venting (range $2,700 – $7,350), and $4,150 for a 50-gallon heat pump model (range $2,780 – $6,050). Published 2026 guides put installed ranges at $1,500–$2,800 (electric tank), $2,000–$3,500 (gas tank), $4,000–$6,500 (tankless) and $3,500–$6,000 (heat pump). Use the calculator above with your household size and adders for a number fitted to your home — these are planning estimates, not bids.

About $2,300 for a simple same-spot replacement (typical range $1,500 – $3,350), covering a $700–$1,400 unit, $600–$1,300 in labor, plus permit and haul-away. The number climbs if the venting must be converted to power-vent ($200 – $800), the gas line is undersized ($500 – $1,500), or the unit moves to a new location ($300 – $1,200). A 2026 Barrie-area guide puts gas tank installs at $2,000–$3,500, which brackets our engine mid estimate.

About $4,650 for a gas tankless with a new venting run (typical range $2,700 – $7,350). The two adders that surprise people are venting ($400 – $1,800) and gas line upsizing ($500 – $1,500), because a tankless burner fires far harder than a tank. A full retrofit with both upgrades can approach $8,850; a simple swap reusing existing venting and gas line lands near $2,300. Tankless guides put the national average around $2,650 installed for gas, with complex retrofits up to about $5,500.

Often yes if you heat with electricity. A 50-gallon heat pump install runs about $4,150 versus $2,050 for a standard electric tank, but it uses roughly a third of the electricity: about $213/year versus $811/year for a family of four at $0.17/kWh, saving roughly $598 a year. Over 10 years the total cost of ownership is about $7,080 for the heat pump versus $11,160 for the electric tank — the heat pump wins by roughly $4,080. Against cheap natural gas it is closer: a gas tank 10-year TCO is about $6,760.

It depends what you are replacing. For a family of four at national-average rates, 10-year total cost of ownership is about $6,760 (gas tank), $7,080 (heat pump), $7,750 (gas tankless) and $11,160 (electric tank). A gas tankless beats an electric tank on lifetime cost (payback about 3 years), but against a gas tank the tankless premium takes about 15 years to earn back through energy savings — so the tankless case is strongest when replacing electric, or when endless hot water and 20+ year lifespan matter to you.

A family of four typically needs 40–50 gal for a tank, or about 6 GPM of tankless capacity (roughly 210,000 BTU/hr of burner at a 70°F rise, which maps to a standard 199,000 BTU unit). Those are planning bands from household size; for an exact answer run a peak-hour demand worksheet in our water heater size calculator, which follows the DOE/AHRI method fixture by fixture.

For a tankless unit, a new sealed-combustion vent run adds $400 – $1,800. Converting an old atmospheric-vent gas tank to power-vent adds $200 – $800. Venting is the single most common reason a tank-to-tankless conversion quote lands thousands above the unit price — the burner, the vent material and the labor are all different from a simple tank swap.

In most US municipalities, yes — water heater work touches gas, electrical or plumbing, so a permit and inspection are standard. Budget $50 – $300; reputable contractors include it as a separate line item on the quote. Unpermitted work can become an insurance and home-sale disclosure problem later, so confirm the permit is in the bid before work starts.

No. The federal 25C energy-efficiency credit — 30% up to $2,000 for heat pump water heaters — ended for equipment placed in service after December 31, 2025 under the One Big Beautiful Bill Act. A unit installed in 2026 gets $0 federal credit, even if you signed the contract in 2025; eligibility follows the placed-in-service date. Many contractor sites still advertise “up to $2,000” — that is stale. Check your utility instead: state and utility rebates of roughly $300–$850 remain available in many areas. Enter yours in the TCO tab.

A fuel switch runs about $3,800 all-in (typical adder range $800 – $2,200), because the installer must run a new gas line or a new 240V circuit, plus change the venting. For a 50-gallon propane tank with a fuel switch the all-in mid estimate is about $3,800. Get the gas or electrical scope as a separate written line item — it is the part of the bid most likely to be underestimated.

Relocating the unit adds roughly $300 – $1,200 in extra labor and materials — new water lines, gas or electrical runs, venting, and sometimes a condensate route. Moves often trigger venting and code upgrades at the same time, so a relocated tankless can stack relocation + venting + gas line adders. Keep the unit in place if the layout allows; it is the cheapest decision in the whole project.

A straightforward same-type tank swap takes about 2–6 hours of plumber time. A tankless conversion with new venting and gas line work is usually a full day, and complex retrofits can run two days. Permit inspections add calendar time around the work itself — the physical install is rarely the bottleneck.

For a single remote fixture — a far bathroom, a wet bar, an ADU sink — where running hot water from the main tank wastes gallons down the drain. Installed cost is about $900 (typical range $450 – $1,600) per unit, with no venting and minimal labor. It is a supplement, not a whole-house replacement: one unit serves one or two nearby fixtures.

This calculator estimates the installed cost of the water heater appliance itself: unit, labor, venting, gas/electrical upgrades, permit and disposal. If you want to sanity-check a plumber hourly rate, trip fee, emergency surcharge or flat-rate quote for general plumbing work, use our plumber cost calculator instead — it prices the trade, this page prices the appliance.