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Plumbing Early data Updated Apr 2026

Tankless Water Heater Installation
in Washington

Jump to 7 receipts

Built by Connor, a homeowner. Real receipts only. Why this exists →

Tankless water heater installation in Washington typically costs between $5,205 and $10,500, with a median price of $7,000. Costs can range from $2,050 to $12,000 depending on your specific situation and contractor.

The typical range
$5,205 $10,500
Middle 50% · median $7,000
Full reported range $2,050–$12,000 across 7 receipts.
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7 receipts in last 90 days Size context collecting (2/7 sized) Updated Apr 8, 2026 Help keep this current →
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The receipts

Every receipt below is a real homeowner report behind this page.

7 total receipts
$10,000.00
52 days ago
Anonymous
Size not reported

Installed a tankless water heater outside and it cost about 10k.

$2,050.00
52 days ago
Anonymous
gas

Used Your Local Plumbing Company for the installation of a natural gas tankless water heater.

$00,000
52 days ago
Contributor-only
Provider name hidden until contributor access

Scope and write-up hidden until contributor access.

$00,000
52 days ago
Contributor-only
Provider name hidden until contributor access

Scope and write-up hidden until contributor access.

$00,000
52 days ago
Contributor-only
Provider name hidden until contributor access

Scope and write-up hidden until contributor access.

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Common questions

Tankless water heater installation in Washington

How much does tankless water heater installation cost in Washington?
The typical tankless water heater installation cost in Washington is $7,000, based on 7 verified homeowner reports.
What's the typical price range for tankless water heater installation in Washington?
Most homeowners in Washington pay between $5,205 and $10,500 for tankless water heater installation. That middle 50% range is a more useful comparison than the typical alone because it shows where real quotes actually land.
Why are some tankless water heater installation quotes higher?
Price varies with home size, system size, materials, and scope. Quotes above the typical range usually reflect bigger homes or premium materials; quotes well below it sometimes leave out permits, haul-away, or warranties.
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