iHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%100+58.7Reliability 26%98+25.6Value 15%100+15.2Craft & service penalty99−0.1Experts Score= 99Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.99SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#2 of 26 gas contractorsiPosition by Experts Score among all companies we track in this category. · better than 96%
5.0★★★★★121 Google reviews · 2 photos
100%five-star reviews
5.00★last 12 monthsiAverage stars on reviews from the last 12 months only.
0%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
99%reviews answered by the owner
$353typical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
Google reviewers rate Mark Henry Plumbing and Heating Corp five stars based on 121 reviews, with the owner responding to 99 percent of them. Customers primarily describe services such as Local Law 152 gas inspections, backflow tests, and heating repairs. Recurring themes include punctuality, clear communication of findings, reasonable pricing, and professional conduct. Reviewers note that staff explain complex requirements thoroughly and respond promptly to inquiries. No common criticisms appear in the provided excerpts, which consist entirely of positive feedback regarding reliability and attention to detail.
Google rating: 5.0 out of 5 from 121 reviews (100% five-star).
Reviews on this page: 121 Google reviews (112 with written comments).
Owner responses: the business replied to 99% of reviews.
Most recent review: September 25, 2026.
Service: Gas Contractor serving New York, New York.
Data from Google, last updated October 25, 2026.
Score profile vs other gas contractors
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: satisfaction and value; weakest: reliability.
This companyGas Contractors median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Mark Henry Plumbing and Heating Corp: 100/100 on this factor. Category median: 91.A
100
ReliabilityiReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Mark Henry Plumbing and Heating Corp: 98/100 on this factor. Category median: 87.A
98
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Mark Henry Plumbing and Heating Corp: 99/100 on this factor. Category median: 91.A
99
ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Mark Henry Plumbing and Heating Corp: 100/100 on this factor. Category median: 100.A
100
MomentumiMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Mark Henry Plumbing and Heating Corp: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Not enough reviews for this factor yet. Category median: 83.–
–
Bar = this company · dark tick = category median.
Star ratings
121 Google reviews we collected
5.0of 5
5 stars121100%
4 stars00%
3 stars00%
2 stars00%
1 star00%
Praise vs complaints
Phrases our text analysis found in 112 written reviews
100%praise
Praise300100%
Complaints00%
PriceiGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Price verdicts customers left with their Google review
100%fair
Great price1286%
Reasonable214%
Overpriced00%
Not sure00%
$353-4% vs typical gas contractors
Middle half of what 10 customers paid ($328–$379) · gold mark = category median.
Topic share
How often each topic comes up in the written reviews
7topics
Staff & attitude7625%
Would recommend5518%
Speed & response4816%
Communication3813%
Quality & results3311%
Price & value3010%
Honesty & trust207%
What customers talk about
We read 112 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“I hired Mark and his expertise because my property was up for the local law 152 inspection that nyc mandates every 4 years.”
“Overall I would absolutely recommend Mark and his services.”
“After finding Marks number and seeing his great reviews I gave him a call and he was absolutely prompt, attentive and very professional and to the point.”
“Mark stayed on the phone with him and explained all of the work that was necessary for me to pass inspection, which is huge.”
“He is an exceptional guy and he did an excellent job and I appreciate all of his help, advice and expertise and his recommendation for Gary.”
“Reasonable price, good communication, timely filing with the City.”
“I truly appreciate his honesty and transparency, which is something that’s hard to find these days.”
praise complaint · found by our text analysis, Google review wording unchanged.
Recent priced reviews
Ivan4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 5 months ago★★★★★
I hired Mark Henry for an LL152 inspection and couldn’t be happier with the experience. He explained every step in detail, made the process easy to understand, and was completely transparent throughout. Mark is honest, trustworthy, and charges a very fair rate compared to the rest of the market. I strongly recommend…
Paid $300–400Great price
David1 reviewiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 9 months ago★★★★★
Mark was excellent to work with. He did my gas line inspection and explained in detail how to correct the minor problems he found. I found him to be honest and trustworthy. His prices were also very reasonable. I would recommend him to anyone looking for a plumber.
Paid $300–400Great priceService not listed
JayLocal Guide · 26 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 11 months ago★★★★★
Mark got in touch early, showed up exactly when he said he would, charged less than most or all (I don't even get quotes from others after last inspection in 2021). Inspected quickly and efficiently and was friendly and helpful.
Paid $300–400Great priceService not listed
Katherine4 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a year ago★★★★★
Used this company for my bldg gas inspection as per law 152. The process couldn’t be easier. Mark is a great communicator, responsive and punctual. Couldn’t ask for a better experience. Will use again
Paid $300–400Great priceService not listed
MichelleLocal Guide · 13 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a year ago★★★★★
I hired Mark to conduct the Local Law 152 gas inspection for my property in Brooklyn, and I couldn’t be more satisfied. I saw his services from Google, and didn’t know I would be working with the owner Mark himself. From the start, communication was excellent—quick to respond and always available to answer…
I hired Mark and his expertise because my property was up for the local law 152 inspection that nyc mandates every 4 years. My original plumber gave me a run around for nearly a year and I wanted to get it done as I have alot of other obligations to tend to.
After finding Marks number and seeing his great reviews I gave him a call and he was absolutely prompt, attentive and very professional and to the point. We set up a date to do the inspection and Mark came over in perfect timing and looked through my property and unfortunately it did not pass the first inspection. There were small things not up to code because I have a older property and I also had some conditions that needed to be improved upon which were all addressed and taken care of. He recommended me an excellent plumber named Gary, who just like Mark are very professional and know their craft very well.
Mark stayed on the phone with him and explained all of the work that was necessary for me to pass inspection, which is huge. Its not easy for a non plumber to know all these things, so this was a huge help. Gary took care of the work, and Mark rescheduled for the 2nd inspection a few weeks later. And we passed on the 2nd time. He came in perfect timing again and took care of all the filing. Nyc has also changed this to where you can apply for these things online but it is not at all intuitive and ridiculously confusing. I am very proficient in tech and I would still be confused, but Mark laid everything out and also has the I structions necessary to follow so you can set up an account and pay for the filing inspections and see the status of your property on the nyc database.
Overall I would absolutely recommend Mark and his services. He is an exceptional guy and he did an excellent job and I appreciate all of his help, advice and expertise and his recommendation for Gary. So that I now have a new plumber I can rely on when needed. Ill see you again in 4 years. Cheers. 🙏🏾.
Price assessment: Great price
Price: $400–600
Dan Zheng7 reviewsiTotal number of Google reviews Dan has written across all businesses on Google Maps, not just this one.
Mark Henry is a Licensed Master Plumber and I hired him for an LL152 inspection. He was patient, knowledgeable, and professional. After his inspection, he took the time to explain the work that needed corrections, and was clear in communicating the type support hangers, type & color of paint that was required.
Plumbing is not my wheelhouse, so the details and guidance he provided is incredibly helpful, in addition to saving time. I truly appreciate his honesty and transparency, which is something that’s hard to find these days.
Mark made this a very smooth and straightforward experience, and I would highly recommend him for anyone that needs an LL152 inspection. He’s already in my calendar for the next required inspection.
Thank you, Mark.
Response from the owner · 2 months ago
Thank you Priscilla for the kind words, I appreciate your support
Tony Wong1 reviewiTotal number of Google reviews Tony has written across all businesses on Google Maps, not just this one.
I hired Mark Henry for an LL152 inspection and couldn’t be happier with the experience. He explained every step in detail, made the process easy to understand, and was completely transparent throughout. Mark is honest, trustworthy, and charges a very fair rate compared to the rest of the market. I strongly recommend him to anyone needing an LL152 inspection.
Price assessment: Great price
Price: $300–400
Response from the owner · 5 months ago
Thank you for your support and business we appreciate it 🙏
Angie5 reviewsiTotal number of Google reviews Angie has written across all businesses on Google Maps, not just this one.
It is rare to find someone who goes above and beyond for a complete stranger, but that is exactly what Mark does. I reached out to him regarding a gas line integrity test, which is a task that falls outside his typical scope of work. Despite the fact that he could not take the job, he did not just move on and delete my message. Instead, he took the time to call me back and provide thorough, expert advice on how to navigate the process. He even provided a realistic price range so I could approach the project with confidence. He offered all of this guidance for free, proving that he is as sincere as he is knowledgeable. Although we have never met in person, Mark is officially my first choice for any future plumbing needs. He is a rare find in the industry (probably in any industry).
Response from the owner · 6 months ago
Thank you for the kind words, it was great speaking with you and good luck with this project. I hope our conversation helped.
Albert YakhninLocal Guide · 34 reviewsiTotal number of Google reviews Albert has written across all businesses on Google Maps, not just this one.
We hired Mark Henry Plumbing and Heating Corp to perform the Local Law 152 gas line inspection at 2701 Cropsey Avenue, and the experience was outstanding from start to finish. Mark was knowledgeable, thorough, and took the time to walk me through every step of the process clearly and honestly. Communication was effortless — he responded promptly and arrived exactly on schedule. His pricing was fair and transparent. I would highly recommend him to anyone in need of a gas inspection or plumbing services.
Response from the owner · 6 months ago
Thank you Albert for the support, we appreciate you 🙏
K PLocal Guide · 17 reviewsiTotal number of Google reviews K has written across all businesses on Google Maps, not just this one.
We had an excellent experience with Mark, a Licensed Master Plumber. From the moment we spoke, it was clear that he is incredibly knowledgeable, honest, and professional. What really stood out to me was his integrity—he took the time to explain everything clearly and did not try to take advantage of my lack of knowledge, which is unfortunately rare these days.
Mark gave us thoughtful, accurate guidance that ultimately saved us a significant amount of time, stress, and unnecessary expense. His transparency and willingness to educate rather than upsell truly set him apart.
I highly recommend Mark to anyone looking for a trustworthy and experienced plumber. I will absolutely be using him again for our next required inspection.
Thank you again, Mark—you made a complicated situation so much easier.
Price assessment: Great price
Response from the owner · 7 months ago
Thank you for the kind review, it really helps us tremendously. We appreciate it
Jesse Wright9 reviewsiTotal number of Google reviews Jesse has written across all businesses on Google Maps, not just this one.
I have consistently had an outstanding experience dealing with Mark. He is responsive, considerate, thorough, professional, courteous, explains all steps and findings clearly, and has been a pleasure to work with. I routinely go to him first for all of my plumbing needs, including Local Law 152 gas inspections and backflow preventer tests.
Price assessment: Great price
Response from the owner · 7 months ago
Thank you for your kind words and review. I appreciate your support and business.
