Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in your area

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.

Tankless water heater repair pros in Mastic

Avatar for Energywise, Inc.
Energywise, Inc.
2231 5th Avenue
New on HomeAdvisorNew on Angi
Approved Pro
Energywise, Inc.
2231 5th Avenue
New on AngiNew on HomeAdvisor
Approved Pro
40 years of experience
Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


Avatar for Tedco Group, Inc.
Tedco Group, Inc.
140 North 9th Street
4.54(
323
)
Approved Pro
Tedco Group, Inc.
140 North 9th Street
4.54(
323
)
Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
15 years of experience

We are dedicated to providing our clients with the very best in service, installation, and repair for your heating and cooling needs. We are a locally owned and operated company that values honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Fantastic service. Job was completed quickly, and staff was clean."

Panagiotis S on May 2025

We are dedicated to providing our clients with the very best in service, installation, and repair for your heating and cooling needs. We are a locally owned and operated company that values honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Fantastic service. Job was completed quickly, and staff was clean."

Panagiotis S on May 2025


Avatar for Abstract Plumbing, Heating and A/C
Abstract Plumbing, Heating and A/C
PO Box 142
4.81(
35
)
Approved Pro
Abstract Plumbing, Heating and A/C
PO Box 142
4.81(
35
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

Abstract Plumbing, Heating and Air Conditioning is a locally owned and operated business. We take pride in every job we do and guarantee 100% customer satisfaction. Call now for a free estimate. 631-698-9600

"Everything went according to schedule. Work was neat and completed on time. Would do business with abstract again."

Tony F on February 2022

Abstract Plumbing, Heating and Air Conditioning is a locally owned and operated business. We take pride in every job we do and guarantee 100% customer satisfaction. Call now for a free estimate. 631-698-9600

"Everything went according to schedule. Work was neat and completed on time. Would do business with abstract again."

Tony F on February 2022


Avatar for Pedone Construction, Inc.
Pedone Construction, Inc.
61 Sunup Trail
5.00(
11
)
Approved Pro
Pedone Construction, Inc.
61 Sunup Trail
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
251 local quotes requested

At Pedone Construction, we specialize in beautiful bathroom and kitchen remodels of all sizes. Using state of the art materials and old world craftsmanship, we create spaces that you will love with unparalleled, design, quality and attention to detail. From a simple bathroom update to a full custom kitchen, call today for a free design consultation.

"I recently had the pleasure of working with Pedone Construction on a full kitchen remodel, and I couldn’t be happier with the results. From start to finish, the entire experience was smooth, professional, and exceeded all our expectations. Communication by Michael was top-notch—every question I had was answered quickly, and he kept me in the loop every step of the way with pictures and constant communications. Michael showed up on time every day respected my home, and maintained a clean and organized workspace. What really stood out was his attention to detail and craftsmanship. Every cabinet, countertop, and tile was installed with care and precision. He listened carefully to what I wanted, offered great design suggestions, and truly brought my vision to life. The finished kitchen is not only beautiful but highly functional and it’s now my favorite room in our summer house. If you’re looking for a contractor who delivers quality work, excellent service, and peace of mind, I wholeheartedly recommend Michael and his company. We did fill this out yesterday but just in case resending it"

Ed K on April 2025

At Pedone Construction, we specialize in beautiful bathroom and kitchen remodels of all sizes. Using state of the art materials and old world craftsmanship, we create spaces that you will love with unparalleled, design, quality and attention to detail. From a simple bathroom update to a full custom kitchen, call today for a free design consultation.

"I recently had the pleasure of working with Pedone Construction on a full kitchen remodel, and I couldn’t be happier with the results. From start to finish, the entire experience was smooth, professional, and exceeded all our expectations. Communication by Michael was top-notch—every question I had was answered quickly, and he kept me in the loop every step of the way with pictures and constant communications. Michael showed up on time every day respected my home, and maintained a clean and organized workspace. What really stood out was his attention to detail and craftsmanship. Every cabinet, countertop, and tile was installed with care and precision. He listened carefully to what I wanted, offered great design suggestions, and truly brought my vision to life. The finished kitchen is not only beautiful but highly functional and it’s now my favorite room in our summer house. If you’re looking for a contractor who delivers quality work, excellent service, and peace of mind, I wholeheartedly recommend Michael and his company. We did fill this out yesterday but just in case resending it"

Ed K on April 2025


Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
PO BOX 584
4.67(
255
)
Approved Pro
JBL HOME IMPROVEMENTS INC
PO BOX 584
4.67(
255
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
2043 local quotes requested

JBL Home Improvements, Inc, located in St. James, is a family owned and operated remodeling business specializing in residential projects. Owner & Contractor David Kaplan, General Manager Jill Kaplan, along with their team of talented professionals, are dedicated to providing outstanding workmanship and customer service to homeowners who live in their community.

"Although there was an initial delay in hearing from JBL once we decided to go with them for the job, once Dave started the work communication with him and each member of the team was excellent. The space was gutted. The job included installation and painting of drywall, adding recessed lighting, laying porcelain floor tile, plumbing work to install the clothes washer and installation of a baseboard type heater. An additional small plumbing job was added to repair an outdoor faucet. Dave came by almost every day. Each phase of the work was explained and completed as planned. The entire team was punctual, very respectful of the home and did beautiful work. We are very happy with the outcome and would use JBL again."

Jan C on November 2018

JBL Home Improvements, Inc, located in St. James, is a family owned and operated remodeling business specializing in residential projects. Owner & Contractor David Kaplan, General Manager Jill Kaplan, along with their team of talented professionals, are dedicated to providing outstanding workmanship and customer service to homeowners who live in their community.

"Although there was an initial delay in hearing from JBL once we decided to go with them for the job, once Dave started the work communication with him and each member of the team was excellent. The space was gutted. The job included installation and painting of drywall, adding recessed lighting, laying porcelain floor tile, plumbing work to install the clothes washer and installation of a baseboard type heater. An additional small plumbing job was added to repair an outdoor faucet. Dave came by almost every day. Each phase of the work was explained and completed as planned. The entire team was punctual, very respectful of the home and did beautiful work. We are very happy with the outcome and would use JBL again."

Jan C on November 2018


Avatar for Kitchen & Bath Works INC
Kitchen & Bath Works INC
1551 LIincoln Ave
5.00(
101
)
Approved Pro
Kitchen & Bath Works INC
1551 LIincoln Ave
5.00(
101
)
Approved Pro
Customers say: Quick response
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers
471 local quotes requested

Kitchen and Bath Works Inc has been owner operated and successfully in business since 1994. Offering a consultative approach and delivering on quality, custom work, our business has been overwhelmingly driven by word of mouth referrals. From start to finish, we stand by our work and our owner is committed to being present on all jobs.

"Lou renovated my kitchen last year and I was completely satisfied. I called him back this summer to gut and remodel my bathroom. He was extremely considerate, and he treated my house as if it were his own. My house is small, and I only have one bathroom. The project took nine days. I was anticipating that there would be a big mess and a huge inconvenience. But even the demo was done very neatly and efficiently. Lou even took the time to re-connect the toilet each night so that I wouldn't be left without. Lou did an amazing job, and it was a pleasure working with him. Once again, I am pleased to recommend Lou for your kitchen or bath project."

Janet M on November 2023

Kitchen and Bath Works Inc has been owner operated and successfully in business since 1994. Offering a consultative approach and delivering on quality, custom work, our business has been overwhelmingly driven by word of mouth referrals. From start to finish, we stand by our work and our owner is committed to being present on all jobs.

"Lou renovated my kitchen last year and I was completely satisfied. I called him back this summer to gut and remodel my bathroom. He was extremely considerate, and he treated my house as if it were his own. My house is small, and I only have one bathroom. The project took nine days. I was anticipating that there would be a big mess and a huge inconvenience. But even the demo was done very neatly and efficiently. Lou even took the time to re-connect the toilet each night so that I wouldn't be left without. Lou did an amazing job, and it was a pleasure working with him. Once again, I am pleased to recommend Lou for your kitchen or bath project."

Janet M on November 2023


Avatar for Islandwide Contracting
Islandwide Contracting
23 Union Avenue
5.00(
1
)
Approved Pro
Islandwide Contracting
23 Union Avenue
5.00(
1
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
377 local quotes requested

​At Islandwide Contracting LLC, we have been proudly serving Suffolk County and surrounding areas since 2019, bringing over 30 years of combined experience to every project. Our comprehensive range of residential and commercial construction services includes interior and exterior work, such as medical offices, restaurants, urgent care facilities, dormers, and extensions. We specialize in bathroom and kitchen renovations, as well as basement transformations. Contact us today for a free estimate at 631-779-9277, and let us help you build the dream you envision. ​**At Islandwide Contracting, we deeply appreciate the dedication and sacrifices of our military personnel, first responders, and senior citizens. As a token of our gratitude, we are proud to offer special discounts tailored specifically for these esteemed groups. Please inquire about these exclusive offers when you contact us, and let us assist you in bringing your vision to life.**

"Islandwide Contracting did an amazing job for our new medical facility in Holbrook. We have gotten tons of compliments for their high quality work. Definitely would rehire them again! Thank you to Andrew and his team."

Sayed K on March 2025

​At Islandwide Contracting LLC, we have been proudly serving Suffolk County and surrounding areas since 2019, bringing over 30 years of combined experience to every project. Our comprehensive range of residential and commercial construction services includes interior and exterior work, such as medical offices, restaurants, urgent care facilities, dormers, and extensions. We specialize in bathroom and kitchen renovations, as well as basement transformations. Contact us today for a free estimate at 631-779-9277, and let us help you build the dream you envision. ​**At Islandwide Contracting, we deeply appreciate the dedication and sacrifices of our military personnel, first responders, and senior citizens. As a token of our gratitude, we are proud to offer special discounts tailored specifically for these esteemed groups. Please inquire about these exclusive offers when you contact us, and let us assist you in bringing your vision to life.**

"Islandwide Contracting did an amazing job for our new medical facility in Holbrook. We have gotten tons of compliments for their high quality work. Definitely would rehire them again! Thank you to Andrew and his team."

Sayed K on March 2025


Avatar for BuildRite Pro Inc.
BuildRite Pro Inc.
Suffolk County
4.11(
19
)
Approved Pro
BuildRite Pro Inc.
Suffolk County
4.11(
19
)
Approved Pro
1422 local quotes requested
Free onsite estimate

Here at Bawa Construction Group, we sustain our business on quality and integrity. We are experts in general contracting specializing in all types of remodeling, Concrete work, Hardscaping/Pavers, Kitchen/Bath/ and Basements. We are committed to providing quality services from the beginning to the end of your project or scope of work. We look forward to earning your business. We also offer financing options to all customers dealing with 30+ banks and lenders. Book your FREE ESTIMATE today!!!

"Didn’t make good on a project gone bed."

Gale M on February 2024

Here at Bawa Construction Group, we sustain our business on quality and integrity. We are experts in general contracting specializing in all types of remodeling, Concrete work, Hardscaping/Pavers, Kitchen/Bath/ and Basements. We are committed to providing quality services from the beginning to the end of your project or scope of work. We look forward to earning your business. We also offer financing options to all customers dealing with 30+ banks and lenders. Book your FREE ESTIMATE today!!!

"Didn’t make good on a project gone bed."

Gale M on February 2024


Master Remodelers
Covering Suffolk County
5.00(
6
)
Approved Pro
Master Remodelers
Covering Suffolk County
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
597 local quotes requested

We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"Excellent service"

Nick G on May 2025

We pride ourselves on the quality work we provide, while delivering great customer service. Check out our services offered and call or click to schedule an estimate today!

"Excellent service"

Nick G on May 2025


Avatar for Allied Construction Corp
Allied Construction Corp
26 Pagnotta Dr
4.47(
160
)
Approved Pro
Allied Construction Corp
26 Pagnotta Dr
4.47(
160
)
Approved Pro
Customers say: True professional
1051 local quotes requested
36 years of experience

**We are now specializing in Kitchen Remodeling**At this time we are unable to take on Bathroom Remodeling projects**Our first priority has always been the satisfaction of our customers, and we take great pride in both the quality of our work and the quality of the customer service we extend to each and every one of our clients, regardless of the size of their project. When trusting Allied Construction Corporation with your home remodeling project, you are trusting a crew of dedicated and talented home remodeling experts to take you through every single step of the process, and to keep you up to date on developments. We always treat your project – and your home – with the utmost level of care and respect. We strive to ensure that every last detail of your work order is performed with the same level of quality we would apply to our own home. Our work over the years has proven to yield exceptionally high return on investment, making your home not only the haven you envisioned but also more valuable. What is more, we provide extremely affordable home remodeling services, making it possible for you to see your vision come to life without breaking the bank. We also offer Angie's List members a 10% Discount on all Labor. We have been on the Discovery Channel. (References upon request). Additional Phone: 516-500-8170 Additional email: alliedgcinc@aol.com.

"This was an extensive project which was handled very well by Allied. Tom, the owner, is accommodating and helpful. Christian and Omar were fantastic! hey showed up early each morning as expected, worked hard throughout the day, and always cleaned up after themselves. There was a lot of problem-solving to be done throughout (by no fault of their's) and we got help suggestions and solutions throughout. The prices were reasonable and the quality of the work was great. I would highly recommend Allied."

Deb D on July 2021

**We are now specializing in Kitchen Remodeling**At this time we are unable to take on Bathroom Remodeling projects**Our first priority has always been the satisfaction of our customers, and we take great pride in both the quality of our work and the quality of the customer service we extend to each and every one of our clients, regardless of the size of their project. When trusting Allied Construction Corporation with your home remodeling project, you are trusting a crew of dedicated and talented home remodeling experts to take you through every single step of the process, and to keep you up to date on developments. We always treat your project – and your home – with the utmost level of care and respect. We strive to ensure that every last detail of your work order is performed with the same level of quality we would apply to our own home. Our work over the years has proven to yield exceptionally high return on investment, making your home not only the haven you envisioned but also more valuable. What is more, we provide extremely affordable home remodeling services, making it possible for you to see your vision come to life without breaking the bank. We also offer Angie's List members a 10% Discount on all Labor. We have been on the Discovery Channel. (References upon request). Additional Phone: 516-500-8170 Additional email: alliedgcinc@aol.com.

"This was an extensive project which was handled very well by Allied. Tom, the owner, is accommodating and helpful. Christian and Omar were fantastic! hey showed up early each morning as expected, worked hard throughout the day, and always cleaned up after themselves. There was a lot of problem-solving to be done throughout (by no fault of their's) and we got help suggestions and solutions throughout. The prices were reasonable and the quality of the work was great. I would highly recommend Allied."

Deb D on July 2021

...
Showing 1-10 of 974
Share project details to get started.