Home Cost Report

Water heater replacement cost in Seattle

Water heater replacement in Seattle costs about $950 to $4,100 (typically $1,650) — local prices run about 18% above the national average.

These figures adjust our national water heater replacement range to Seattle's local cost level — see the method and sources below.

Low
$950
Typical
$1,650
High
$4,100

How we localized this

We start from our national water heater replacement range of $800–$3,500 and adjust it for Seattle, where costs run about 18% above the national average. Seattle is one of the more expensive U.S. metros for home-improvement work. A cost-index comparison frames Seattle renovation pricing as about 28% above the national average, while the multiplier it actually applies to project estimates is 20% above; other local remodeling guides put the range as high as 25–50% above, largely citing tech-sector wage competition for skilled trades. Mortenson's quarterly index shows Seattle's recent cost growth running below the national pace, which points to a market absorbing pressure rather than one still accelerating — but the underlying level remains high. We apply about 18% above national, close to the more conservative of the cited multipliers. Materials are priced roughly nationally, so treat this as an approximation — your actual price depends on your home, contractor, and project specifics.

Seattle cost sources (2)

Tech-sector wage competition pulls up pay for skilled trades across the metro, and strong, steady demand leaves many contractors with little scheduling downtime. The Seattle Department of Construction and Inspections (SDCI) processes permits online, but timelines vary widely — simple permits often clear in 2–4 weeks, while structural work or an accessory dwelling unit (ADU) can take 3–6 months. Seattle's wet climate makes roofing and decking material choices matter more than in drier regions; composite decking and metal roofing cost more upfront but hold up better against sustained rainfall than wood or standard asphalt. ADU construction is especially active here, driven by the region's housing shortage and comparatively permissive local rules.

Estimate your Seattle water heater replacement

Adjust for your water heater and install. The estimate starts from our published range.

Adjusts the estimate to local cost levels. Pick a metro or leave on national.

Estimated cost for your options in Seattle
$950 – $4,100
Typical: $1,650
Adjusted for Seattle — costs there run about 18% above the national average.

How we got this

Starts from our published water heater replacement range of $800–$3,500, adjusted for:

  • Type & fuel: Gas tank (40–50 gal)×1
  • Tank size: Standard (40–50 gallon)×1
  • Installation: Straight swap, same location×1
  • Area: Seattle×1.18

These figures are planning estimates compiled from public cost data on the dates shown — not quotes, bids, or guarantees. Real prices vary widely with your home, location, materials, permits, and contractor. Always get itemized written quotes from licensed local pros before budgeting or hiring.

What changes the price

  • Fuel type — Varies

    Electric tanks are usually cheapest to install; gas needs venting; switching fuel types adds cost.

  • Tank size — Raises cost

    Larger tanks (75–80 gal) cost more than standard 40–50 gallon units.

  • Tankless vs. tank — Raises cost

    Tankless units cost more to buy and install but last longer and save space.

  • Code & permit upgrades — Raises cost

    Bringing venting, gas, or seismic strapping up to code adds cost.

  • Relocation / venting — Raises cost

    Moving the unit or adding venting raises labor.

Get real quotes for your Seattle water heater replacement

Our ranges are for planning. The only way to know your real price is itemized quotes from licensed local pros — always get at least three before you hire.

Tip: search for licensed, insured Seattle water heater replacement contractors in your area, check reviews and references, and compare written itemized bids — not just bottom-line numbers.

Water heater replacement cost — FAQ

How much does it cost to replace a water heater?
A standard tank water heater runs about $900–$1,800 installed for most homes, averaging around $1,400, within a national range of roughly $800 to $3,500. Gas tanks cost more than electric, large or tankless units cost more, and a simple same-spot electric swap is cheapest — often $800–$1,200.
Is a tankless water heater worth the higher cost?
Tankless units cost more to buy and install (often $1,400–$5,600) but last 20+ years and heat water on demand. The energy savings are real but modest for most homes; the bigger draws are endless hot water and freeing up floor space.
Gas vs. electric water heater — which is cheaper?
Electric tank units are usually cheaper to buy and install; gas units cost more upfront and need venting but often cost less to run. Your existing hookup usually decides it — switching fuel types adds significant cost.
How long does a water heater last?
A tank water heater typically lasts 8–12 years; tankless units can last 20+. If yours is leaking from the tank itself, replace it — tank leaks can't be repaired.

Cost data compiled June 13, 2026.

Sources (4)

Range synthesized from the editorially-independent cluster (Angi $882–$1,817, avg ~$1,340; HomeGuide $600–$3,100). A lead-gen source (HomeBuddy, $1,900–$9,000) was treated as a high outlier and dropped from the anchor — its inclusion is what inflated the earlier draft. Metro-level breakdowns are coming as we verify local data.

Compare other locations

See all Seattle HVAC costs on the Seattle HVAC page.

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