The Real Cost of a Tankless Water Heater Upgrade

By Sidney Baysinger, Updated August 2025

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Cost Overview
Upgrading to a quality gas tankless water heater typically costs: These costs, as shown below, are average; additional costs may apply due to the home's design, age, and condition.

• 1-bath home: $3000–$4000 (plus permit if needed).

• 2-bath home: $3500–$4500 (plus permit if needed).

• 3-bath home: $4500–$5500 (plus permit if needed).

• 4+ bath home: $5500–$6500 (plus permit if needed).

Note: Upgrading gas lines to meet local plumbing codes, are extra cost if needed.

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Why Choose Navien?
We recommend Navien for its reliability and efficiency:

• Dependable: No cold-water interruptions during showers.

• Low Maintenance: Dual stainless steel heat exchangers reduce upkeep by 75%.

• Long-Lasting: 15-year warranty, 25+ year lifespan.

• Instant Hot Water: The Recirculation pump and buffer tank deliver hot water instantly.

• Energy Savings: Pays for itself in 3–4 years, with up to 10x savings over its lifetime.

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Why GasTankless.com?
With over 160 years in the plumbing trade, since 1856, our family business now specializes just in water heaters. We carry only top brands of gas tankless water heaters—Navien and Rinnai —perfect for Roseville's climate and regulations. Our expertise ensures you get a reliable, energy-saving system tailored to your home.

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Condensing Technology
Modern condensing tankless heaters are up to 25% more energy-efficient than non-condensing models, saving you more on energy bills. Don’t trust outdated online info—technology has advanced significantly in recent years.

 

Get Started
Call GasTankless.com at (916) 459-7566 for a free, no-obligation in-home evaluation and a written quote customized for your home, family, and budget.