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The Cost of Tankless Water Heater Installation

Home | Blog | Published on June 12th, 2025

Upgrading to a tankless water heater is an investment in energy efficiency, long-term savings, and home comfort. While the initial cost is higher than that of a traditional unit, the performance benefits and reduced utility bills often make it a worthwhile choice.

At Swift Plumbing & Heating, we specialize in tankless water heater installation and are committed to helping Bainbridge Island homeowners understand both the upfront costs and long-term value of these systems.

Find out what affects tankless water heater cost and how to budget wisely.

How Much Does Tankless Water Heater Installation Cost?

The average cost to install a tankless water heater ranges from $2,000 to $4,500. This estimate includes the unit itself, professional labor, and any updates needed to meet plumbing or electrical codes.

Several factors can influence the final cost. Gas units typically cost more than electric models but may offer better efficiency over time. If your home’s layout requires updates to plumbing or wiring, installation complexity and therefore cost may increase. Transitioning from a traditional tank system to a tankless model might involve additional steps, such as rerouting water lines or adding ventilation. Finally, high-end models with added features like Wi-Fi connectivity or recirculation systems may come with a premium price tag.

What’s Included in Professional Installation?

When you hire Swift Plumbing & Heating, the installation process is comprehensive. It starts with a site evaluation and sizing consultation to select the right model for your household’s needs. If you’re replacing an old unit, we’ll safely remove and dispose of it. Our technicians will make any necessary plumbing, gas, or electrical upgrades and complete the installation to meet all local codes. Once the system is in place, we conduct a full performance test and walk you through how to use and maintain your new water heater.

Long-Term Value of a Tankless System

Although tankless systems require a higher upfront investment, they deliver substantial value over time. Because they heat water only as needed, they help reduce energy waste and lower your utility bills. With proper maintenance, these systems can last up to 20 years significantly longer than traditional models. They’re also ideal for high-demand households thanks to their ability to supply endless hot water. Plus, their wall-mounted, compact design saves valuable space in your home.

FAQs About Tankless Water Heater Installation

Is a tankless water heater worth it?
Yes. The long-term energy savings, extended lifespan, and convenience often make it a smart investment for many homeowners.

Can I install one myself?
No. Installation involves complex plumbing, gas, and electrical work. Attempting DIY installation can be unsafe and may void the manufacturer’s warranty.

Will I need a permit?
Yes, and we handle all the necessary permits and ensure the installation complies with local regulations.

How long does installation take?
Most installations are completed in 6 to 10 hours, depending on site conditions and system complexity.

Did You Know?

ENERGY STAR reports that tankless water heaters can be 24% to 34% more energy-efficient for homes that use 41 gallons or less of hot water daily.

Upgrade your home’s comfort, efficiency, and hot water supply with help from Swift Plumbing & Heating trusted local professionals with decades of experience and a commitment to quality.

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