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Top-Rated Tankless water heater installers in Renton - Updated Nov 2026

Avatar for Stream Water Heaters
Stream Water Heaters
5.0(
55
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"My water heater died last week. I went on Home Advisor and received a number of calls. One from George at Stream Water Heaters. We discussed my problem. George requested Photos of the heater and the area around the heater. Within 30mins I received an estimate. The price was totally reasonable for equipment and install. The water heater from a well known company and carried a better than good warranty. I received an install time of 6pm next day. The team remved the old water heater, replaced an obsolete valve, and installed the new water heater. I had numerous questions. All my questions were answered in the most courteous manner. The professionalism, expertise, and timeliness of George's Team were exceptional. Highly recommend this company."
A 20-Year-old gas WH.
A 20-Year-old gas WH.
Preventative Gas Repl.
Preventative Gas Repl.
Non-Condensing Tankless W

+1

Response time4 hrs
Response rate100%
Recommended by11%of homeowners
Avatar for Stream Water Heaters
Stream Water Heaters
5.0(
56
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"My water heater tank stopped working so I decided to convert to a tankless system. Chad and George were who I worked with. I had a great experience with both of them. I was very pleased with their knowledge, work, communication and help. I would highly recommend them to other house owners."
New
New 3
New 2
New Setup 2
New setup

+8

Response time5 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for SeaTown Electric Heating and Air
SeaTown Electric Heating and Air
4.7(
1,638
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Great communication throughout the entire process, informative friendly people from the office to the field. All safety precautions were taken during both the in home estimate and final installation of the water heater which was completed in under 4 hours. SeaTown are my new best friends!"
Seattle's Rewire Specialists
Generator
Tesla Chargers
Knob and Tube Removal
Ductless Install

+26

Response time1 day
10 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Black Hills, Inc.
Black Hills, Inc.
4.5(
606
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Emergency services offered

"Received the best quote compared to other bids I received...same price as everyone else but I got a full furnace and duct work done...basically a new system along with a tankless water heater for the same price as other company! Snow storm hit and went out of their way to ensure we had workers and appointment was kept! Highly recommended!"
Furnace
Heat Pump
Heat Pump
Furnace
Mini Split

+12

Response time1 day
4 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Pipers Drain Repair LLC
Pipers Drain Repair LLC
4.8(
17
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Pipers Drain Repair is a trusted provider of professional plumbing company services dedicated to keeping residential and commercial plumbing systems flowing efficiently. With a commitment to quality workmanship, fast response times, and exceptional customer service, Pipers Drain Repair specializes in diagnosing and resolving a wide range of plumbing issues, from leaking water line repairs to full house repipes. Using advanced equipment and proven techniques, the company delivers reliable, long-lasting solutions that help prevent costly future problems. Pipers Drain Repair takes pride in offering honest assessments, transparent pricing, and customized services tailored to each customer’s needs. Whether handling routine maintenance, drain inspections, hydro jetting, or complex repairs, the team is focused on delivering dependable results with minimal disruption. Known for professionalism, integrity, and attention to detail,

Liner Install
Liner Install
sewer camera inspection
Sink Drain Repair
Sink Drain Repair

+40

Avatar for Private I Plumbing LLC
Private I Plumbing LLC
5.0(
26
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Bad hot water heater. Came same day and gave bid which was lower than most. Completed work quickly the next day. Will hire him anytime I need plumbing work. very friendly and polite.A+++ in my book"
Water heater replacement
Water heater replacement
Water Heater install
Water Heater install
Water Heater install

+18

Response time6 hrs
Response rate100%
61 neighbors recently requested a quote
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,467
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Emergency services offered

Warranties offered

"My technician arrived at 9:00 am and did not leave my home until 6:00 pm. He installed a new water heater, removed my old water heater and fixed a hot water leak under my home. HE ASSURED ME THAT HE WOULD NOT LEAVE UNTIL ALL THE WORK WAS COMPLETE. HE WAS ABSOLUTELY GREAT!!!!!!!!! After the work was complete he performed a complete clean up of his work area. I will need some electrical work done in the future and HARTS will also be doing that work. They are professional, on time, and extremely knowledgeable on the work they perform. THEY HAVE MADE ME A LOYAL CUSTOMER FOR LIFE."
Prep Area
Waterfall Finished!
Excavation jobs and more!
 install grease trap for commercial kitchen
Delivery of Shoring

+334

43 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,249
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Emergency services offered

Warranties offered

"Brian was on time and super knowledgeable for dealing with my tankless hot water heater. He got right to work and dealt with the problem and helped me establish a paper trail with the manufacture in case of any future warranty concerns."
Pipe llining
Pipe relining
Pipe relining
Camera inspections
Response time50 mins
Response rate100%
21 neighbors recently requested a quote
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,043
)
Tankless Water Heater - Install

Serving Renton, WA and surrounding areas

Approved

In business since 2013

Emergency services offered

Warranties offered

"Brian was on time and super knowledgeable for dealing with my tankless hot water heater. He got right to work and dealt with the problem and helped me establish a paper trail with the manufacture in case of any future warranty concerns."
Before the Extension
After Extension
Recommended by92%of homeowners
...
Showing 1-10 of 151

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