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

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

Serving Leominster, MA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"I'm a deep value oriented consumer and this guy is one of the best contractors I've come across for the money. Why would you want to pay for the administrative and marketing costs which comes with the fees charged by the big box guys. D-Day is a true professional and a master craftsman at his work. I've hired him to replace a water heater, install a dishwasher and washing machine, as well as miscellaneous plumbing repairs with exemplary results. I wouldn't even consider looking elsewhere."
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 Leominster, 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 Leominster, MA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"I am absolutely thrilled with Domination's Service.  A highly skilled plumber (today Tristen) comes quickly, determines exactly what the problem is, recommends the best products to solve the problem, then the service manager calls with pricing so there are no surprises, and Tristen does an excellent job of fixing the problem and installing new products.  I have had this company come a couple of times and I am always completely satisfied with the excellent work they do.  I highly recommend Domination."
Custom Work
Custom Work
Custom Work
Custom Work
Custom Work

+20

Response time4 hrs
Response rate96%
10 neighbors recently requested a quote
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)
Tankless Water Heater - Install

Serving Leominster, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"Not easy finding an HVAC company willing to install a gas steam boiler. These guys did it all and did it well, removing the old oil burner and oil tank, installing a Weil McClain boiler including steam piping and hot water, installing gas piping, electrical and plumbing, including all inspections, even leaving me a temporary hot water heater until the furnace installation was completed. They fully accommodated my schedule as well. The town electrical inspector who came after installation was complete confirmed their good reputation."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
26 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Advanced Energy Concepts of Worcester, Inc.
Advanced Energy Concepts of Worcester, Inc.
3.8(
140
)
Tankless Water Heater - Install

Serving Leominster, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Aron did a excellent job repairing my hot water tank. He replaced the control valve and it still did not worked. He took it all apart right to the pilot light and found the orface was blocked. He is very professional and a good personalty.He was a pleasure to have at my home and he is an asset to your company."
Response time3 days
Response rate85%
25 neighbors recently requested a quote
Avatar for Heritage Home Service
Heritage Home Service
4.6(
22
)
Tankless Water Heater - Install

Serving Leominster, 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
Papalia Home Service
4.8(
5
)
Tankless Water Heater - Install

Serving Leominster, MA and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Credit card accepted

Papalia Home Services is a business that has been serving the Boston Metro West Area since 1990. With over 30 years of service under our belts, we've grown into the most dedicated plumbing & heating service in the Bay State, many thanks to our fully-trained technicians. No matter if it's installation, repair, replacement, you name it—our staff is trained how to handle the latest technology and will always show up to your home with a fully stocked truck ready to go! \n

Showing 1-10 of 50

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