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Pierce County · Updated August 2026

Best Tankless Water Heaters in Tacoma, WA

Tankless water heaters heat on demand — endless hot water, 20+ year lifespans, and closet-sized footprints. Wet-side installs must be sized for our cold 45–50°F groundwater, which catches out units (and installers) from milder climates.

$4,500–$9,000
Typical cost, installed conversion

Wet-side market range — get itemized quotes before work starts

Call sooner, not later, if:
  • Replacing a tank and weighing the upgrade
  • A household that regularly outruns its hot water
  • Gas-line sizing questions — tankless usually needs a bigger line

Top-Rated Companies for Tankless Water Heaters in Tacoma

Same no-pay-to-play ranking as everywhere on Wetside Plumbing — the formula.

#2 · TACOMA

Upfront Septic & Plumbing

5.0 rating · 96 Google reviews · Septic system service
2367 Tacoma Ave S Ste 201, Tacoma, WA 98402
#4 · TACOMA

Pacific Heating & Cooling

4.9 rating · 7,007 Google reviews · HVAC contractor
8607 Durango St SW STE A, Tacoma, WA 98499
#5 · TACOMA

Mercurio's Heating & Air Conditioning

4.9 rating · 4,955 Google reviews · HVAC contractor
4001 S Union Ave, Tacoma, WA 98409
#6 · TACOMA

Bob Larson Plumbing

4.9 rating · 2,127 Google reviews · Plumber
4320 128th St E, Tacoma, WA 98446
#7 · TACOMA

In & Out Plumbing

4.9 rating · 369 Google reviews · Plumber
1139 Browns Point Blvd NE, Tacoma, WA 98422
#11 · TACOMA

A Blue Collar Plumber Llc

4.9 rating · 32 Google reviews · Plumber
16908 22nd Ave E, Tacoma, WA 98445
#12 · TACOMA

24 Emergency Plumber Tacoma

4.9 rating · 31 Google reviews · Plumber
1102 Broadway #23, Tacoma, WA 98402

Google Business data, 2026-08-07. See the full Tacoma ranking →

Also searched as: tankless water heater installs, tankless water heaters.

Before You Call

Tankless Water Heaters: Common Questions

Is tankless worth it over a tank?

Long-run economics favor tankless (lifespan, efficiency); upfront cost favors tanks. If you're staying put 10+ years or chronically run out of hot water, tankless usually pencils. Our tank-vs-tankless guide runs the numbers.

Why does sizing matter more here?

A tankless unit's output depends on how much it must raise incoming water temperature. Wet-side groundwater is cold most of the year, so a unit that serves a three-bath house in California may struggle here. Insist on sizing math for 45°F inlet water.

How do I check a company's license?

Ask for their Washington L&I contractor number and verify it at secure.lni.wa.gov/verify — active license, bond, and insurance. Listings above with a green badge are ones we've already matched to an active license in state records.

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