Flushing

Atg Mechanical Corp. Plumbing & Heating

4.6 of 5

Average of 48 Google reviews

Positive and negative reviews

  • Positive 43 reviews, 90% of all reviews
  • Negative 5 reviews, 10% of all reviews
  • Not counted 0 reviews, 0% of all reviews

Google reviews of 4 or 5 count as positive. Google reviews of 1 or 2 count as negative. Google reviews of 3 are not counted.

AI summary of their website

About Atg Mechanical Corp. Plumbing & Heating

  • In business: 56 Years (Since 1970)

Services

  • Water heaters
  • Tankless water heaters
  • Leak detection
  • Gas lines
  • Backflow prevention
  • Plumbing fixtures
  • Water treatment
  • Commercial plumbing

They offer

  • Warranty on work
  • Discounts

From their website, atgmechanicalcorp.com, as of October 23, 2026.

These facts are the business's own claims, and FairPipes has not checked them. AI summarized the website and can make mistakes.

What their website says

In business
"Trusted Plumbing Heating and Gas Services in NYC & Nassau County Since 1970"
Water heaters
"Water Heater Repairs & Replacements"
Tankless water heaters
"Tankless Water Heaters"
Leak detection
"Leaking Plumbing Pipe Repairs"
Gas lines
"Gas Line Leak Repairs"
Backflow prevention
"Backflow Prevention"
Plumbing fixtures
"Sink & Shower Plumbing Fixtures"
Water treatment
"Water Treatment & Purification"
Commercial plumbing
"COMMERCIAL PLUMBING"
Warranty on work
"1-Year Guarantee on Labor"
Discounts
"Senior Citizen and Military Discounts Available"

AI-generated summary

Summary of reviews

AI wrote this summary from the reviews below. It can make mistakes, so read the reviews too.

What reviewers like

  1. Reviewers mention prompt responses and timely arrivals

  2. Reviewers praise professional and courteous service

  3. Reviewers say plumbing and heating problems were resolved

  4. Fair or competitive pricing

What reviewers dislike

  1. Reviewers report estimates that work was not completed or did not fix the problem

  2. High prices or overcharging

  • Written reviews used: 46
  • Made on October 24, 2026

AI reads the Google reviews shown on this page, up to 300. When there are more, it reads a random sample of 300 with the same mix of star ratings as all the reviews. Each point is something at least 3 reviewers say. It shows how many, and you can open their reviews. Complaints are what reviewers report, not our verdict. We check serious ones before showing them. AI can make mistakes, so read the reviews too.

Photos

From their website, atgmechanicalcorp.com

Call (718) 551-1850Visit website

License record

Not checked by FairPipes yet

We do not have license records for New York yet. Look up this business on the state licensing board's website.

Details

Hours
  • Monday to Friday 8:00 am to 5:00 pm
  • Saturday 8:00 am to 12:00 pm
  • Sunday Closed

Hours as listed on Google; we have not checked them.

Reviews

From Google

Penelope Bouklas 5 of 5

New Omg Andreas and his team were amazing ! I had a small problem and it was solved immediately! I highly recommended him. If I had another problem I would call him immediately!! A+++++++

From Google

Monique Francis 5 of 5

I wanted to have my new stove installed quickly so my family and I could go on vacation for the Labor Day weekend. ATG Mechanical delivered! They provided same day service, sending 2 friendly, expert plumbers who completed a quick, seamless, and flawless install. They were very kind to provide light assistance after the old stove was removed and then reviewed the features of the appliance with me as they tested it afterwards. With this high quality service offered at a competitive, more cost-effective price, I will definitely call and use ATG again for future needs.

From Google

FruitGoneBad 5 of 5

Great price | $1,000+ The guys at ATG were great. They helped my family out with a fast and professional boiler replacement this past winter. I’d recommend them to anyone looking for a fair price and amazing service. Thanks guys!

From Google

Kat Casey 5 of 5

Reasonable price We have dealt with a lot of plumbers and contractors while renovating a Queens row home and ATG has corrected a lot of their work. They are actually Navien experts. They have gone out of their way, during two plumbing emergencies, to be on site same day or next day to assess our problem and have been excellent at communicating and efficient to ensure our problem is actually resolved. You might find a cheaper quote but I have wasted a lot of money on people who actually don't know what they are doing. Get your money's worth, and help me justify my learning expenses, by hiring ATG the first time. Now that they've saved our butts and sacrificed time with their own families during a blizzard and holiday they will always be our first call for all plumbing work. Services Plumbing leak detection, Plumbing pipe repair, Water heater repair, Heating system maintenance

From Google

Mustaque Ahmed 5 of 5

Overpriced | $1,000+ Very Very bad bad service Services Heating system installation

From Google

Amanda Andrews 5 of 5

I am beyond pleased with the great work that Carmelo and Vasilis did to repair and elevate my bathroom. In less than 2 hours, they addressed 3 plumbing issues I was having: a toilet that wasn't working properly, a slow draining sink, and a shower with limited hot water. All of these problems are now fully fixed. Carmelo and Vasilis were also extremely professional. They were very courteous and considerate as I was working from home while they were completing the repairs. It was raining when they arrived, and they put a sheet over my apartment floor as to not tread dirt into the apartment. Upon completion, they cleaned the space around their repairs and even offered to help me restore items that had been moved. Services Toilet repair, Drain cleaning, Shower repair

From Google

Chi Ming Tang 5 of 5

ATG did an excellent job fixing a heating issue with my Navien combi boiler. Andreas also diagnosed and resolved a high PSI problem in my water main that previous plumbers missed. The team was super responsive, even stopping by on the weekend when needed. Highly recommend ATG for any plumbing or heating needs! Services Plumbing pipe repair, Heating system maintenance

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you, Chi Ming, for the thoughtful review and for trusting ATG Mechanical with your Navien system and water main repair. We’re glad we could identify and resolve the PSI issue and get your heating system running smoothly again. It was a pleasure working with you, and we truly appreciate your recommendation! Andreas & the ATG Mechanical Team

From Google

Liangqi Chen 5 of 5

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you for the five star review. We really appreciate it.

From Google

WILLIAM CHEN 1 of 5

I called ATG to fix my boiler. The owner Andres gave me an estimate that it would be a $250 diagnostic inspection. After the inspection, he said the issue was with the motherboard and changed it. It didn't fix the problem work. Next, he said it was the screen and changed it. Then he said it's another unnamed? part. He said he would identify it by Monday (2 days later) but he never got back to me. Finally, on Wednesday (4 days later), I reached out to asked for an update. Still no update on Saturday. It has been 1 week, I have paid $616 to repair nothing, and I still haven't heard any update.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Hi William, Thank you for your patience throughout this process. I understand your frustration, and I want to provide some clarity on the situation. When I last updated you on Wednesday, I mentioned that I was still working on locating the necessary part for your discontinued boiler model. Unfortunately, sourcing this part has proven more challenging than anticipated, and I’m still waiting for confirmation on its availability. I understand this delay is inconvenient, and I truly apologize for the time this has taken. I’m actively working to resolve the issue, and I’ll provide you with an update no later than Friday. If I’m unable to secure the part by then, I’d be happy to discuss alternative solutions or next steps to ensure your boiler gets back up and running as soon as possible. I value your business and appreciate your understanding. Please let me know if you have any additional concerns.

From Google

Edel Alexander 5 of 5

Excellent service from start to finish! The team was professional and the owner Andreas personally kept me apprised of work status on heating system replacement. Outstanding customer care. Highly recommend this company for all your plumbing and heating needs

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you, Edel for the kind words, myself and my team appreciate you, it was a pleasure working with you looking forward on working with you in the near future

From Google

MD ASADUL ISLAM 1 of 5

Never USE ATG Mechanical Service. Owner of the company Andrea Goustas remember that guy. This guy is a great lair. He worked on my boilar and we request the receipt that we paid him, so I can claim refund from NAVIEN warrenty. This guy said he will give me later and never pickup the phone. Called 100 of times. My thinking He overcharged me for the service that's why he is scared to provide me the receipt. Not recommended anybody whoever works for him. Not recommended. Also filed a consumer complaints at nyc complaint borad.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Dear MD Asadul Islam, We sincerely regret any frustration you’ve experienced. At ATG Mechanical Corp, we take customer satisfaction seriously and strive to ensure a smooth and transparent process for all our clients. Regarding your request for a receipt, we apologize if there was any delay. Please contact us directly at 718-551-1850 so we can resolve this matter promptly. If you have already reached out and haven’t received a response, we will prioritize addressing this for you immediately. We value your feedback and appreciate the opportunity to make things right. Thank you for your patience. Best regards, ATG Mechanical Corp

From Google

Rabbi Eliezer Rafailmehr LMFT 5 of 5

Very positive experience. Professional work and fair prices. Andres, the owner was amazing from beginning to end. The crew were professional, respectful, and cleaned up after themselves. They all went above and beyond to have my boiler and radiators working efficiently. Highly recommended.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you so much for your kind words! We’re thrilled to hear that you had a great experience with our team we take pride in delivering quality work and ensuring everything runs efficiently. Your recommendation means a lot to us, and we truly appreciate your trust in our services. If you need anything in the future, don’t hesitate to reach out!!

From Google

crugg i 5 of 5

I would definitely recommend ATG Mechanical Corp. I was having issues with my boiler. I had called two other companies, and they only made the problem worse. Eventually, I contacted ATG. They assessed the situation, provided a breakdown of what was wrong, and explained how to fix it. Andreas and his team were very professional. Their pipe work is clean and neat, showing their pride in their work.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Ciro, I really appreciate you taking the time to share your experience with ATG Mechanical. It means a lot to me and the team to hear that we were able to properly diagnose and resolve your boiler issues after your previous challenges. We take great pride in our work, and your kind words about our professionalism and clean pipework truly reinforce our commitment to quality service. If you ever need anything in the future, don’t hesitate to reach out—we’re always here to help! Thanks again for your trust and support. Best regards, Andreas ATG Mechanical

From Google

Plateia GR 5 of 5

Professional on time and very dependable.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you for your kind words! We’re thrilled to hear that you found our service professional and dependable. Your satisfaction is our top priority and we look forward to serving you again in the future!!

From Google

S O 1 of 5

They failed on properly bringing our boiler up to proper registration. The boiler installed didn't have proper rating information on it's label. Phone call after phone call with no results. Finally had to have someone else finish the job.

Business reply

Atg Mechanical Corp. Plumbing & Heating

S O, Thank you for your feedback. We sincerely apologize for any inconvenience you experienced with your boiler installation. We want to clarify that the rating information label on the boiler is installed by the manufacturer at the factory, and we rely on this information to ensure proper registration. We always supply the installation and manual booklet with all the warranty information and registration information to all our customers. That said, we regret that the situation wasn’t resolved to your satisfaction and understand how frustrating this must have been. But we never leave any job incomplete especially a heating system.Please reach out to us directly at 718.551.1850 as we would like the opportunity to review the details of your project. Your feedback is valuable,and we’ll use it to ensure a better experience in the future. Thank you for bringing this to our attention.

From Google

Derik Reyes 5 of 5

I recommend AtG Mechanical Corp, I called them Saturday and they came early Monday. I am satisfied and grateful they were able to fix the leak my tank had unexpectedly and install a new tank in a short period of time, they are reliable and respectful and professional .

Business reply

Atg Mechanical Corp. Plumbing & Heating

Thank you Derik so much for taking the time to share your experience with us! We’re thrilled to hear that you were satisfied with our quick response and service. Our team takes pride in being reliable and professional, and it’s wonderful to know that we could meet your expectations. Please don’t hesitate to reach out if you ever need anything in the future. We appreciate your trust in AtG Mechanical Corp!

From Google

Manny Perez 1 of 5

Wouldn't recommend. Had given them 2 projects my dad's and cousins. New installs, Andreas seamed very professional when quoting us and that's why we went with them. They said they warranty everything they do and we decided to go with them. We went through the space that they have for install as we were doing a new basement and wanted to make sure it was kept to where we needit it. Also we were brought nest thermostats and wanted to use them. Andreas explained how he preferred Ecobee if we were going that route. So we exchanged the nest thermostats for the Ecobee .They installed the Navien boiler with Andreas and his guys doing the installation. It took them the day which wasn't bad and seemed great. Andreas didn't install the thermostat and loaned us a thermostat (old school one. So he could come back and install the Ecobee because he didn't have enough time. He was going to comeback and finish the thermostats. The night got chilly and the new Navien was working but around midnight it shut off the heat with an era code. My Parents found t strange. When we called Andreas he was heading to Italy for a trade show, according to him. We restarted the system and got the heat to start working . Then it stopped again. My parents are older and retired with little source of income and they had to deal with this problem. I called Andreas and asked him if he can send one of his guys to fix it and he said it would have to be him him when he comes back. He asked me to read him back the codes and then asked me to get a chair and see if I can reach the exhaust pipe and see if I could move it up. I did and you can hear the water running back to the boiler. It sounded like it shouldn't have been there. He said just lift it up and down Everytime the boiler shuts down. It's water getting stuck in the exhaust. Which right there I knew the install was incorrect. Also there was a water lign which was supposed to be high in the ceiling that they left low that he had to come back and redo. I will cut the review short if not this thing will be very long on all the things that went wrong on the install. Put it this way we called for service from him and never heard back. I troy was professional as car salesman that wants to sell you a new car. The follow up and service is lackluster and is not what they sell you. I pulled my cousins project away from him and gave it to someone else. My feedback is buyer be warned my parents are still hurt from this investment gone wrong.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Dear Mr. Perez, Thank you for sharing your feedback. While we strive to provide exceptional service to all our clients, I am disappointed to hear about your dissatisfaction. I’d like to address some key points and clarify the timeline of events. 1. Installation Date: The installation of the Navien boiler and the initial system setup were completed on November 9, 2022. The work was performed in accordance with manufacturer specifications and New York City Department of Buildings’ plumbing division regulations. 2. Thermostats Installation: At the time of installation, I loaned you a temporary thermostat because the Ecobee thermostats were not ready for installation. I had communicated the importance of providing the thermostats prior to my scheduled departure for an international trade show, but unfortunately, they were delayed on your end. 3. System Shutdown: When the Navien system experienced issues, I provided troubleshooting guidance over the phone, including steps to temporarily address the problem. I assured you that I would handle the matter personally upon my return. 4. Communication Efforts: I reached out to you multiple times after the installation to address any concerns and to schedule the thermostat installation, but there were delays due to your availability. Despite my attempts, there was no timely resolution from your side, which made it challenging to follow up as planned. It’s important to note that this review was written six months ago—significantly after the installation date—and I regret that we were not given the opportunity to fully resolve your concerns earlier. Our company values all feedback as an opportunity to improve, and we remain open to addressing any outstanding issues. If there is anything further we can do to assist, please do not hesitate to reach out.

From Google

Ted Bongiovanni 5 of 5

Hired them to repair a Navien tankless hot water heater. They promptly diagnosed and repaired the problem. Would hire again.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Ted, Thank you so much for taking the time to leave us a review! We are thrilled to hear that you were satisfied with our prompt diagnostics and repair of your Navien tankless water heater. It’s always an our goal to provide reliable and efficient service. We truly appreciate your kind words and look forward to the opportunity to assist you again in the future if needed.

From Google

Stephanie Hippolyte 5 of 5

Business reply

Atg Mechanical Corp. Plumbing & Heating

Stephanie, Thank you so much for taking the time to leave us a review! We truly appreciate your business and we look forward to their opportunity to assist you again in the future if needed

From Google

Yuri Starikov 5 of 5

I represent landlord - Seawest, LLC (“SEAWEST”) - and would like to direct this message to all folks who oversee New York City properties with 3+ units. SEAWEST runs a 3-unit property at the water front location in Far Rockaway, NY area. SEAWEST came across ATG Mechanical Corp. (“ATG”) in 2019. Back then - during pre-ATG days - the property was flooded due to a faulty water heater, which required removal and replacement. ATG came forward with an innovative proposal that would save space and money for small-to-medium home owners: replacement of traditional water heater / boiler technologies with new instant combi-unit for the property, in our case Navien NFC-200. Back then, the proposal was a gamble, because it required moving away from traditional time-tested heating supply toward unfamiliar world of instant combi-boiler. One thing that helped was the “Navient promise,” placing ATG as their “trusted” installer. ATG was, and continues to remain in the status “Navien Service Specialist,” which is the “trusted” installer mark by the combi-unit manufacturer Navien. Notwithstanding the foregoing, the move from traditional heating source to an innovative NFC-200 required a "leap of faith," because new technology requires timely service and maintenance, and therefore dependence on the original installer, here ATG. Accordingly, if your plumbing company fails you as a service provider, then you as a landlord will dive into world of horribles with NYC Department of Housing and Preservation Development and/or Department of Buildings, because all it takes is one 311 call from your tenant, and you as a landlord will be subject to various penalties/fees for code failures. It is 2024 now, and for almost 5 years, ATG has proven itself as a reliable plumbing company for SEAWEST, and a strong “Navien Service Specialist” supporter. Since 2019, SEAWEST’s NFC-200 experienced a number of issues including circulation pump-replacements, mixing-valve issues, and even an expansion tank blow-out as a result of the latest NYC earthquake. Over the years, AGT consistently came forward as a reliable company, which was ready to work through any issues surrounding plumbing challenges. Bottom line: if you are looking for a reliable licensed plumbing professional, who does not do “side gigs,” (although it might :) ) but is there to do a quality job and back it up with its name and license in New York City, go to ATG.

Business reply

Atg Mechanical Corp. Plumbing & Heating

Yuri, Thank you for taking the time to share your detailed experience and for entrusting ATG Mechanical Corp. with your property’s plumbing needs over the past five years. We are delighted to hear that the innovative solutions we provided, particularly the Navien NFC-200 combi-unit installation, have proven to be a worthwhile investment for SEAWEST. Your thoughtful recognition of our efforts, from addressing initial challenges to managing unexpected situations like the NYC earthquake, means a great deal to us. At ATG, our commitment to quality workmanship and reliable service is at the core of everything we do. We’re proud to serve as a trusted Navien Service Specialist and to support property owners like SEAWEST in maintaining safe and efficient systems. Thank you again for your kind words and continued partnership. If there’s anything you need in the future, we’re just a call away.

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Positive and negative reviews

Google reviews of 4 or 5 count as positive. Google reviews of 1 or 2 count as negative. Google reviews of 3 are not counted.

About Atg Mechanical Corp. Plumbing & Heating

From their website, atgmechanicalcorp.com, as of October 23, 2026.

These facts are the business's own claims, and FairPipes has not checked them. AI summarized the website and can make mistakes.

What their website says

In business
"Trusted Plumbing Heating and Gas Services in NYC & Nassau County Since 1970"
Water heaters
"Water Heater Repairs & Replacements"
Tankless water heaters
"Tankless Water Heaters"
Leak detection
"Leaking Plumbing Pipe Repairs"
Gas lines
"Gas Line Leak Repairs"
Backflow prevention
"Backflow Prevention"
Plumbing fixtures
"Sink & Shower Plumbing Fixtures"
Water treatment
"Water Treatment & Purification"
Commercial plumbing
"COMMERCIAL PLUMBING"
Warranty on work
"1-Year Guarantee on Labor"
Discounts
"Senior Citizen and Military Discounts Available"

Summary of reviews

AI wrote this summary from the reviews below. It can make mistakes, so read the reviews too.

How summaries are made

How summaries are made

AI-generated summary

AI reads the Google reviews shown on this page, up to 300. When there are more, it reads a random sample of 300 with the same mix of star ratings as all the reviews. Each point is something at least 3 reviewers say. It shows how many, and you can open their reviews. Complaints are what reviewers report, not our verdict. We check serious ones before showing them. AI can make mistakes, so read the reviews too.

Reviews behind this point

AI-generated summary

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