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

Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
5.0(
328
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Free estimates

Customers say: True professional

"I had Rob install a tankless hot water heater, whole house water filter, and run a new gas line for my gas stove conversion. He was very professional and and was quick to set an appointment. The whole job took a single day and he even removed and disposed of the old outdated appliances. Quality work at reasonable prices! Would highly recommend."
Response time2 hrs
Response rate96%
39 neighbors recently requested a quote
Avatar for AS Plumbing & Heating LLC
AS Plumbing & Heating LLC
5.0(
9
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"Andrew knocked this install out of the park! He replaced an incredibly inefficient hot water heater with a hybrid hot water heater, ran the condensate line through pipe straps screwed into drop in anchors along our basement wall with the cleanest looking final result that surpassed every expectation I had. He was very communicative well within the budget and will be our go to for any future work we need as long as we live in this area!"
6 neighbors recently requested a quote
Avatar for Brad Blomburg P&H
Brad Blomburg P&H
4.7(
19
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

Approved

In business since 2005

Free estimates

Offers commercial services

"Great service. Brad was prompt, and took great care to resolve a tricky issue with my hot water heater. He'll be my first call for any future plumbing needs!"
TANKLESS
WATER HEATER
WATER HEATER
Response time20 mins
2 neighbors recently requested a quote
Recommended by100%of homeowners
Derek Brown - Licensed Plumber
4.4(
12
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

Approved

In business since 2005

Free estimates

Small jobs welcome

Welcome to Derek Brown - Licensed Plumber! If you can imagine it we can do it! Derek is focused on providing high-quality services and customer satisfaction to each and every customer. We will do everything we can to meet your expectations and we are sure you will be happy to work with us. As an expert in the field, Derek has over 30 years of experience under his belt and is known to pay exquisite attention to detail while making customer satisfaction his top priority. Call us today to learn more about how we can help you!

Response time3 hrs
Recommended by90%of homeowners
Avatar for County Line Plumbing and Heating
County Line Plumbing and Heating
5.0(
11
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"I highly recommend Justin from County Line Plumbing and Heating. He recently replaced a hot water heater at a rental property I manage and did a fantastic job from start to finish. He’s prompt, reliable, and always responsive—especially during emergencies. His customer service is excellent, communication is clear, and the work is done right the first time. A true professional and someone I trust with my properties and my own home."
Photo 1
Photo 2
Recommended by18%of homeowners
Avatar for Pasquaney Mech LLC
Pasquaney Mech LLC
4.7(
13
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"I was impressed with his knowledge and his ability to explain his thoughts to me as we were reviewing what needed to be done to install a replacement propane water heater He scheduled the project right away and came in the time frame designated, finish the work and also did extra functions that had to be done to allow the equipment to get into my basement. He followed up to make sure everything was working well and offered to come back in a day or two if I needed assistance. His billing was easy and professional. We are hoping to have him back again next year to do some HVAC work."
Master Bedroom Unit
Office
Great room
Novak Install
Novak Install

+6

Response time1 day
Response rate85%
Alan Bousquet Plumbing And Heating
4.7(
3
)
Tankless Water Heater - Install

Serving Hillsborough, NH and surrounding areas

In business since 1995

Free estimates

"Furnace job:
Allen replaced our ancient Utica Boiler with a new and efficient Buderus., as well as updating all the supporting hardware He did a fantastic job. He came in, assessed the work, made some recommendations (such as installing individual zone pumps), issued an estimate on how long it would take him and how much it would cost. Allen came in and performed all the work he specified in the time he said for the cost he said. Very positive experience.
On the shower and toilets, again, Allen did exactly what he said he would do. We didn't get an estimate for this work so I can's say how well he did coming in on budget, but he did perform the work in the exact amount of time he said he would.

"
Recommended by100%of homeowners
Showing 1-10 of 18

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