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Top-Rated Tankless water heater installers in Saint Charles - Updated Nov 2026

Avatar for MAPLEWOOD PLUMBING
MAPLEWOOD PLUMBING
4.8(
337
)
Tankless Water Heater - Install

Serving Saint Charles, MO and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"Jacob thoroughly looked over everything; water lines, gas line, igniter, gas valve, connections, etc.. He took the time to make sure everything was working properly and even educated me on a few things I didn't know."
Additional Photos
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+7

1 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Mabudees Property Solutions
Mabudees Property Solutions
5.0(
17
)
Tankless Water Heater - Install

Serving Saint Charles, MO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Amazing experience from start to finish. Super responsive, professional, and easy to work with. The water heater installation was done quickly, cleanly, and exactly as promised. Fair pricing, great communication, and quality work — I’d absolutely hire them again."
Work
Work
Work
Bathroom Shower Remodel
Bathroom Shower Remodel

+7

5 neighbors recently requested a quote
Avatar for Mr. Rooter Plumbing of St. Charles
Mr. Rooter Plumbing of St. Charles
4.9(
7
)
Tankless Water Heater - Install

Serving Saint Charles, MO and surrounding areas

Approved

In business since 2001

Emergency services offered

Warranties offered

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.

Additional Photos
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+2

1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Winnovation Plumbing and Drain
Winnovation Plumbing and Drain
5.0(
7
)
Tankless Water Heater - Install

Serving Saint Charles, MO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"This is a good company to deal with. James, the owner, was out within one hour to diagnose our problem. The next morning the technicians, Brian and Josh were out to take care of our drain issues. Brian made a point of showing me the camera footage of the main drain. The did a great job on the main and two other drains. They also cleaned up very well when they were done. Brian also noticed an issue with our bathtub stopper and fixed it without an extra charge. The pricing was transparent. They have a nice email notice system and called when they were on the way. The three men I worked with were all very professional and easy to deal with. I would not hesitate to use them again. Phil Lykens"
Water heater install
Shower Valve replacement
Shower Valve replacement
Stack replacement!
Stack replacement!

+3

15 neighbors recently requested a quote
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The Saint Charles, MO homeowners’ guide to tankless water heater installations

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