Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in Port Jefferson Station, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Tankless water heater installers in Port Jefferson Station - Updated Nov 2026

Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.4(
244
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"From the moment Ryan came through the door We felt that we were in good hands!! From Ryan, Vedil and Mike they did a great job installing our new hot water heater!! No issues at all !! I highly recommend these pros to anyone and will use them again !! Thanks guys !!"
Shower Fixtures
Installation
Truck
Best of L.I. Winner 2024
Angi 2022 Super Service Award Winner

+86

Response time11 hrs
135 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for N. H. Ross, Inc.
N. H. Ross, Inc.
4.7(
190
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 1976

Credit card accepted

Customers say: True professional

"Very professional. Affordable. Zach removed my 12 year old gas hot water tank and installed a new system. He worked diligently, answered all my questions, and afterward went over everything. The work was done well, and all was left clean, and neat. Great customer service and all done the same day I called. I will definitely call this company again."
Tankless
5 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"I called All Weather to give me a quote for replacing my gas boiler. They set up a time for their salesperson to come over and give me a quote. The appointment was only a few days later and a man named Joe showed up on time. He spent some time with me, I told him I was looking for a new boiler and a new hot water heater, but I wanted to see what options I have (since I was debating going to a tankless water heater). He told me going indirect hot water tank is the best option and they always use this brand that's the "best one out there". Even though he may have been right, he didn't tend to my questions or concerns very well. I felt like he was getting annoyed that I had questions and eventually I just let him run the show just to get him out of my house faster. Especially when he gave me a quote of $8600, it was much higher than I was anticipating. One thing I really didn't like was when he said I'd have to get a permit since I live in an incorporated village, which would be an extra $500, meanwhile I already had another plumber tell me a permits only $200. So I went with another company. So even though I can't rate All Weather on their work quality, I didn't get a good feeling from their salesperson."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Mayjac Plumbing, Inc.
Mayjac Plumbing, Inc.
4.6(
15
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 2015

Small jobs welcome

Offers commercial services

"For years I have wanted to update my very old and inefficient American Standard cast iron boiler. I was very fortunate to find Mr Joe Burriesci the owner of Mayjac Plumbing who took the time to evaluate the best options, since the old boiler handled two apartments. We collectively decided to go with two Navien Combi Condensing Boilers, but the best part of the entire process was how meticulous the installation was done. From start to finish Mayjac Plumbing kept every promise and timeline made. I highly recommend Mayjac Plumbing..."
Before Installations
After installations
Whole House PVC Piping 7
Whole House PVC Piping 6
Whole House PVC Piping 5

+16

Response time10 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
A&M Plumbing & Heating
4.8(
11
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

We are a locally owned and operated business committed to providing exceptional service, quality workmanship, and honest communication on every project we undertake. Our experienced team takes pride in delivering customized solutions tailored specifically to meet each client's unique needs. We value integrity and reliability, ensuring every job is completed to your satisfaction. Our goal is to build lasting relationships with our customers through consistency, professionalism, and outstanding results. Let us show you why homeowners continually choose us as their trusted service provider.

Avatar for Four Points Mechanical
Four Points Mechanical
4.5(
17
)
Tankless Water Heater - Install

Serving Port Jefferson Station, NY and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent! Jimmy was on-time - his work was perfect - installed new kitchen faucet and totally replaced bathroom tub/shower fixture - had to cut through sheet rock, he replaced and repaired -completely cleaned up everything. Will definitely use Four Points again and recommend them highly."
Response time8 hrs
Recommended by100%of homeowners
...
Showing 1-10 of 136

The Port Jefferson Station, NY homeowners’ guide to tankless water heater installations

From average costs to expert advice, get all the answers you need to get your job done.