Tankless Water Heater Installation Cost in Boston, MA

Tankless water heater installation in Boston, MA typically costs between $5,000 and $15,000, with half of homeowners paying around $12,000. Installation costs vary considerably, with some projects completed for as low as $5,053 and others reaching $14,000 or more. These figures are based on 5 recent installations in the area.

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Price distribution

Median $12,000.00 · typical $5,053.00–$14,000.00

$12,000.00

$5,000.00

$15,000.00

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

Most jobs land between $5,010.60 and $14,800.00 (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 6, 2026.

Latest reports

The underlying prices behind this page.

5 total reports

$15,000.00

8 days ago

Installed an HTP 150k BTU tankless with three zones 8 months ago. The job cost $15k.

$14,000.00

8 days ago

Replaced a 120K BTU Navien tankless combi 1.5 years ago. The job cost $14k.

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Real homeowner write-ups, locked.

$ • • •

8 days ago

"Completed a tankless water heater replacement recently with 128 Plumbing & Heating. Got the largest unit installed at 150,000 BTU and it cost around $5K."

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