How much does a tankless water heater cost to install in Boston, MA?

A tankless water heater installed in Boston, MA typically runs $2,800–$5,500 total, versus $1,400–$2,800 for a standard tank. The unit itself is $800–$1,500; the rest is labor, venting, and often a gas-line or electrical upgrade. Tankless pays off in high-use homes; in low-use homes the tank is usually the smarter buy.

What you can check yourself

• Count simultaneous hot-water uses (two showers + laundry?) — that sizes the unit; undersizing is the #1 regret.
• Check your gas line size or panel capacity first — upgrades are the surprise cost in most quotes.
• Ask about descaling: tankless units need it roughly yearly in hard-water areas.

Typical cost

Typical installed range in Boston, MA: $2,800–$5,500 tankless vs $1,400–$2,800 tank. Federal and utility rebates may apply — ask the installer to itemize them.

When to call a pro

Get two itemized quotes. If one is far cheaper, it's usually skipping the venting or gas-line work the other included.

Get free quotes from Boston, MA pros →

Data by Servik — verified local pros from official license records and public sources. Cost figures are typical ranges, not quotes; a pro's written estimate is the real number.