Tankless Water Heater Installation Cost in Bellingham, WA

Tankless water heater installation in Bellingham, WA typically ranges from $3,910 to $12,000, with most homeowners paying around $7,000. Half of the projects fall between $6,500 and $11,000, giving you a sense of what to expect in the middle range.

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Price distribution

Median $7,000.00 · typical $6,500.00–$11,000.00

$7,000.00

$3,910.00

$12,000.00

Shaded band: middle 50% of reports (25th–75th percentile). Median tick in teal.

Most jobs land between $4,428.00 and $11,800.00 (5th–95th percentile). Ignoring 1 outlier below and 1 above.

Based on reports from Apr 2026 (first entries this month).

Data freshness: 5 reports in the last 90 days. Help keep this current →

Data last updated Apr 8, 2026.

Latest reports

The underlying prices behind this page.

5 total reports

$3,910.00

6 days ago

Replaced an old Bosch tankless water heater with a new Rinnai tankless system for.

$6,500.00

6 days ago

It took a full day and two plumbers were involved.

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Real homeowner write-ups, locked.

$ • • •

6 days ago

"Ended up paying 11k for a tankless system before rebates and home warranty, which was about 3k out of pocket."

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