WHWater Heater Cost Estimator

Large storage tank

80-Gallon Water Heater Replacement Cost: Installed Scope

Budget an 80-gallon storage-water-heater replacement while checking first-hour delivery, access, fuel, venting and code work.

Direct answer

Current national observations place an 80-gallon storage water heater around $1,200–$4,000 installed before any separately required relocation, difficult access, new venting, gas-line, circuit or panel work. Capacity alone does not prove suitability: compare first-hour rating and recovery with the household's peak demand and the exact installation space.

What changes the result?

A useful calculation starts with the physical scope and the written commercial terms. These are the factors to make explicit:

  • Fuel and exact model
  • First-hour rating and recovery
  • Tank diameter, height and access
  • Venting, gas or electrical capacity
  • Drain pan, expansion control, permit and removal

Use one scope for every quote

Give each business the same information and ask it to resolve the same boundaries. That makes the totals more comparable and exposes work left as an allowance or exclusion.

  1. Record the old model and rating plate
  2. Measure the access route and location
  3. List peak simultaneous uses
  4. Compare the same installed and warranty scope

Start with the installed 80-gallon evidence band

HomeGuide's current national observation is $1,200–$4,000 installed for an 80-gallon storage tank. The prefilled calculator uses that band, then shows removal, permits and replacement venting separately so missing or duplicated work is easier to spot.

Ask whether the quoted installed price includes the unit, delivery, removal, permit, pan and drain, expansion control, shutoffs, connector, venting or circuit work, startup and warranty registration.

Use first-hour delivery, not gallons alone

ENERGY STAR defines first-hour rating as the amount of hot water a storage heater can supply in an hour beginning with a fully heated tank. Two 80-gallon products can therefore deliver different peak performance because input, recovery and controls differ.

List the largest simultaneous uses and compare them with the exact product's first-hour rating. An installer should also check utility capacity, temperature settings, mixing arrangements and local requirements rather than selecting only from household count.

Large tanks make space and access consequential

Measure the tank location, doorway widths, stairs, turns, drain route and service clearances. A new 80-gallon product may not match the old tank's diameter or connections, and safe removal can require more labor than the headline replacement assumes.

For gas models, confirm combustion-air and venting design. For electric models, confirm the circuit and panel. Expansion control, seismic restraint where required, drain pans, relief discharge and permits depend on the property and local code.

Questions people ask

How much is an 80-gallon water heater installed?

A current national planning range is about $1,200–$4,000 installed before unusual access or separately required utility and code upgrades.

Is an 80-gallon tank right for a large family?

Not from gallons alone. Compare peak demand with the exact model's first-hour rating and recovery, then confirm the installation and utility requirements.

Will an 80-gallon replacement fit where the old tank was?

Not necessarily. Measure the location and entire access route and compare the exact product dimensions, clearances and connections.

Does replacement cost include removal and permits?

Only when the quote says so. The calculator exposes them as selected additions so you can reconcile the written scope.

Method and sources

The model is a planning tool, not a quotation. These are the published sources used for this page; read the full assumptions before relying on a range. Source review: 17 September 2026.

Review full methodology