5 reports. Useful first pass, but one outlier can still shift the range.
Tankless Water Heater Installation Cost in Boston, MA
Read what 5 homeowners actually wroteTankless 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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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 last updated Apr 6, 2026.
Latest reports
The underlying prices behind this page.
Installed an HTP 150k BTU tankless with three zones 8 months ago. The job cost $15k.
Replaced a 120K BTU Navien tankless combi 1.5 years ago. The job cost $14k.
Real homeowner write-ups, locked.
"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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