Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in South Lancaster, MA

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 South Lancaster - Updated Nov 2026

Avatar for D Day Plumbing
D Day Plumbing
5.0(
46
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Damien arrived on time, was very hard working, charged an exceptionally fair price, and did an outstanding job. When he left, everything was spotless. He replaced a kitchen faucet, installed a new bathroom faucet/shower head, fixed a running toilet, and even showed me what to use on stubborn hard water stains that I was unable to remove with all the usual methods. We also had him install a second hose for the backyard and replace the existing outdoor spigot. When we redo our bathroom, we will definitely call Damien."
Cabinet - finished product
Cabinet rebuild (before picture)
Gas Hot Water Heater Install - Power Vented
Navien Wall Hung Water Heater
3 Bay Commercial Sink Install

+32

Response time2 hrs
Recommended by100%of homeowners
Girouard Plumbing & Heating
4.8(
5
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

Customers say: True professional

We specialize in all phases of heating, cooling and plumbing services-- installs, repairs, maintenance, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

Recommended by80%of homeowners
Avatar for Domination Plumbing and Heating
Domination Plumbing and Heating
4.6(
23
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"After spending 2 days trying to find someone to replace my hot water heater, Home Advisor recommended this company. They fit me into their schedule the same day and it was installed about 4 hours after my initially contact with them. Casey and Phil were great. Had them look at a couple of other minor future projects to do while they were here. Will definitely hire them again."
Custom Work
Custom Work
Custom Work
Custom Work
Custom Work

+20

Response time4 hrs
Response rate96%
13 neighbors recently requested a quote
Avatar for Advanced Energy Concepts of Worcester, Inc.
Advanced Energy Concepts of Worcester, Inc.
3.8(
140
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Could not be happier with the install of our new propane system. They were very easy to work with Quinn answered all my questions Doug and Bernie and I forget the other guys name were a pleasure to have in my house. They did the work and the Quoted amount of time. They handled all the inspections and permits with the town. Extremely happy with the level of service and would recommend to anybody looking for heating needs. Edit from 2 years ago?. The company still has not picked up old water heater and boiler. Have called a number of times to get this done. Vicki is extremely unpleasant to deal with. Rude. Has zero phone skills. Should really look into finding a new person to answer the phones. She was basically yelling at me for asking, follow up questions. And when I I said, why are you yelling? She said so you would know if I was yelling at you. But she definitely was yelling. I really hope those phone calls are recorded. They?ve got their money. So obviously the customer service ha"
Response time3 days
Response rate85%
33 neighbors recently requested a quote
Avatar for DL Plumbing and Heating
DL Plumbing and Heating
5.0(
5
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"We have used Dave as our plumber multiple times. Some projects were tankless water heater install and servicing, bathroom remodel , also he did all the plumbing for our addition including kitchen/laundry/ bath. Always reliable with good communication. Will continue to use Dave!"
Smart Leak Detection
Driveway Heating
Water Heating System
Heating Systems
Radiant Floor Heat

+4

Response time1 day
Avatar for Morton Plumbing and Heating
Morton Plumbing and Heating
5.0(
5
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 1985

Free estimates

Credit card accepted

Morton Plumbing and Heating is dedicated to providing our customers with the best quality and \ncraftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

1 neighbors recently requested a quote
Avatar for Heritage Home Service
Heritage Home Service
4.6(
22
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved (Corporate)

In business since 2018

Free estimates

Emergency services offered

"We hired Loudon Mechanical to install Daikin mini-splits in our home. The quote was reasonable. Each person in their crew was courteous, prompt, and efficient. They completed our job in two days and left the job site clean. W are extremely pleased with Loudon Mechanical and would highly recommend this company."
Garbage disposal
Bathroom plumbing
Water heater
Water Filtration
Plumbing maintenance

+19

Response time9 hrs
Recommended by84%of homeowners
...
Showing 1-10 of 60

The South Lancaster, MA homeowners’ guide to tankless water heater installations

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