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Roof Warden

Roofing contractor

DeNisco Construction Company LLC

124 Baker St, Manchester, NH 03103

Google average
4.8
Ratings counted
86
One and two star
4 of 86(4.7%)
New Hampshire median
1.5%

The first three are Google’s own figures for DeNisco Construction Company LLC, read on 24 September 2026; the share is of every rating Google has counted, not of the review texts on this page. The median is ours — the middle figure among the New Hampshire roofers we list with enough ratings to compare.

Rating breakdown

4.8
86 ratings
How the 86 ratings break down, from five stars to one
5
8093%
4
22%
3
00%
2
00%
1
45%
4.7%of these 86 ratings are one or two stars (4)

About typical — the typical roofer in New Hampshire sits at 1.5%. A higher share is a reason to read the critical reviews below, not a verdict.

The critical reviews

The one and two-star reviews, first. These are what a star average hides, and they are the reason this page exists.

All 3 of the one and two-star reviews we hold for DeNisco Construction Company LLC, most recent first.

  • 1 out of 5Jezzie B2 years ago

    Only because it's not possible to give ZERO STARS. First, may I say we never hired them to do a roofing job. The attached photos are what I came home to. I asked why they were set up in our driveway with equipment, machines, ladders and they had their work truck parked in the other space we pay to have plowed. No one answered. Not one word. Not excuse me, not sorry. Nothing. I thought there could be a language barrier. My Spanish is minimal at best. I tried to speak to the person in charge and he was receptive to me in Spanish, but as I said I am limited. I called the "24 hours emergency line" I am still waiting for a call back. Please note the house on the right was having the roof done. They have a full driveway. This is how they chose to set up. The person that disperses the crew is responsible. As I said he has still not bothered to call.

    Reply from the business

    Hello Jessie be I thought me and you had a conversation and we came to a conclusion about the infraction that you misunderstood so I’m wondering why this is still posted up and you said you were going to take it down. Have a great night and thank you again for understanding Hello, I apologize for the inconvenience. I did not receive the message until the next morning for some reason, but I talk to my lead guy who speaks English very well, and he had stated that they had items in your driveway and they moved them and apologized, and everything was OK. That same morning I was over there about nine or 10 AM and sorry car in the driveway. I had parked right out front of the house and we made a decent amount of noise while we were there and nobody came out. I didn’t want to disturb anybody so I said hey everything must be OK like my guy said and I left it at that, now I see an email in my inbox stating I have a new one star review on my Google page so I check it out and it is same incident. I apologize for any inconvenience and I would like to know if there’s any damages to your property or anything like that because we would gladly take care of them and again I apologize for using the driveway to install a new roof on the neighbors house. As I’m sure you’re aware of the house is in disarray and a friend of mine. Purchased the house to Rehab it and then sell it again. Saying that there was already a dumpster in the driveway. It’s kind of a tight neighborhood and there’s not a lot of room to work, I know me and my crew take Friday night work and we pick up well and if we don’t have to go on other peoples property, we do not. Again I apologize and I personally will be back on that property within the next couple days too fix the porch on the right side of the house because there was so much water damage it rottedthe wall of the porch so we have to reframe that I will be back there doing that work personally. I will be more than happy to talk when I am onsite. Thank you

  • 1 out of 5May4 years ago

    I had my roof redone by them and it collapsed. I reached out several times and got no response by him. Never doing business with you again!!!!!

    Reply from the business

    Hello I believe you have me confused with another company. If you have an issue with your roof I will Be more than happy to check it out, but I can assure you you didn’t hire me to install the roof and then the roof caved in.

  • 1 out of 5Jenna Stevens5 years ago

    It took 2 phone calls to get a call back for a quote. John made an appointment and then failed to show up for it or even call. Never rescheduled. It took me leaving this review for him to call and text me.

    Reply from the business

    Jenna, I apologize for the mix up. I try to get to everybody to the best of my ability. I am not perfect and things happen. I do not like people upset with me or my business I try hard to go the extra mile for all my customers. If you didn’t find a contractor I will come by later today and look at your roof and fix it this week giving you 10% off. I called you right when I saw this post to relay this message to you. I am not perfect but I stand behind my work and my business. Again my apologies I will do what I stated above. Sincerely John DeNisco

What reviewers keep mentioning

Topics Google extracted from this business’s reviews, with how many mention each. These are words that appeared in reviews, which is not the same as a service the business sells.

  • estimates7
  • large project7
  • awesome crew6
  • siding replacement5
  • roof stripping4
  • new roof installation3
  • fast and efficient3
  • rubber roof replacement2
  • house and garage roofing2
  • quick roof replacement2

Other reviews we hold

14 more of the 71 reviews we hold text for, most recent first. We do not hold every review Google has.

  • 5 out of 5Shantal Fuller3 days ago

    Very pleased with my roof John had all the materials at my house the next day without even taking a deposit,was impressed with the trust and communication,roof came out great and 3 of my neighbors have used him since with zero issues as well,I wouldn't recommend another roofing company but DeNisco they really go above and beyond Thanks again John let me know when you have time to roof the barn in back !!!!!!!!

  • 5 out of 5Khristan Latulippea year ago

    This is the second time we’ve used Denisco Construction to do a roof. First at our home several years ago and then just recently at our parents home. They really are the best out there from fair price to fast scheduling and then superb job! …

    Google cut this review short. The full text is on their Google profile.

    Reply from the business

    Thank you Khristan, we appreciate the kind words. We try to do our best. Any issues or questions please don’t hesitate to contact us. John D

  • 5 out of 5Lynda Masaites2 years ago

    Excellent communication and service! I still can’t believe how fast they stripped the two layers of roofing shingles. My new roof is just perfect! Thanks for a great job at a fair price!

    Reply from the business

    Thank you for the review. We are glad you enjoyed the process. Thanks again John DeNisco

  • 5 out of 5erik piermattei2 years ago

    These guys did a great job not only were they fast they were neat clean and believe it or not picked up all the nails and everything else all in one day which was amazing I now have a 30-year warranty roof for a great price compared to the competition

    Reply from the business

    Thank you for the kind words.

  • 5 out of 5Corey Martin2 years ago

    John and crew came out to my home and did a great job on my Roof I highly recommend them. He was on-site working hand in hand with his crew! He went above and beyond answered all my questions I had. I’d highly recommend!

    Reply from the business

    Thank you for the kind words Corey. If there are any issues, be sure to let us know. Thanks again John DeNisco.

  • 5 out of 5robert aiello4 years ago

    John and his crew arrived on time and worked like a well oiled machine. The quality was top notch and the attention to detail by his crew was second to none. …

    Google cut this review short. The full text is on their Google profile.

    Reply from the business

    Thank you Robert we are glad we could assist you in on your roof needs.

  • 5 out of 5Alan Migneault4 years ago

    I would highly recommend John Denisco and his company for your roofing needs. I did a thorough research of roofing companies for my home in Nashua. I had one company quote me $18,000 for my ranch style house. I had another company quote me …

    Google cut this review short. The full text is on their Google profile.

    Reply from the business

    Thanks Alan

  • 5 out of 5C Pier4 years ago

    We were very pleased with the new roof installation by Denisco Construction. They stripped and reshingled our 200+ yr old house, garage and barn extremely quickly and neatly and left a very professional looking product that makes me smile every time I look at it. We highly recommend Denisco for their efficiency, quality of workmanship and reasonable price.

    Reply from the business

    Thank you for the kind words. It was a pleasure Installing a new roof on your home. Especially when I learned the history of the property and got to see all the hard work you all have put into it as well. If there are any issues or projects please don’t hesitate to give us a call.

  • 5 out of 5Brian Midolo4 years ago

    John and his company are an absolute joy to work with. Best of all the met all price, delivery, and quality promises and expectations. We highly recommend this company. Thank you John.

    Reply from the business

    Thank you Brian for choosing us.

  • 5 out of 5Cheryl Hollands4 years ago

    Just completed our roof today, a great Easter present! Job completed in a day and a half and we couldn’t be more pleased. Roof looks great and except for the footprints you’d never have known they were here. I highly recommend Denisco Roofing.

    Reply from the business

    Thank you for the kind words. Im glad we could help you in your roofing needs. Kind regards John DeNisco

  • 5 out of 5Brian Bright4 years ago

    John and his team were very professional and clean. They went over and above to make sure the roof was safe and weather proof. I would recommend DeNisco Roofing

    Reply from the business

    I’m glad we could be of service. Thank you for the Business.

  • 5 out of 5Jennifer Barewicz4 years ago

    John and his team were great! John was responsive via email and text during the planning process and was very patient while we figured out a plan. His team was in and out in one day and cleaned up like they were never even there! Definitely recommend to anyone looking for an affordable and quick roof installation!

    Reply from the business

    Thanks Jennifer Barewicz

  • 5 out of 5Jackie Wilson4 years ago

    John and his crew did an EXCELLENT job on my roof . I called for 7 estimates and the others just couldn't beat his price. Once I signed the contract, he ordered the materials ahead of time in the event the prices would go up (I wanted to wait until the end of Summer for installation). None of the other contractors mentioned to me they would do this. The installation was topnotch using quality materials. John is professional, honest and a wicked nice guy. His work crew were also professional and very hard workers, I never once observed any one of them just stand around and do nothing. You could tell they took pride in their work. If I ever needed any other work done around my home I wouldn't hesitate a heartbeat to call on John.

    Reply from the business

    Jackie Wilson . Much apprecaited

  • 5 out of 5Kevin Fraser5 years ago

    John and his crew are extremely professional and hard working . I am very pleased with my new roof and work done on my soffits. I would recommend Denisco roofing to anyone. Thanks John great job.

    Reply from the business

    Thanks for your Kind review Kevin

Other roofers in Manchester

Ranked by how many ratings Google has counted.

Other roofers we list in Manchester
Roofing contractor
Patriot Roofing LLCroof replacement, new roof, siding5.0457 ratings0.4% one and two star(603) 722-5149
Pyramid Roofingclean up, warranty, speed of work4.9398 ratings1.0% one and two star(603) 641-5500
Queen City Roofingroof replacement, reasonable pricing, estimate process4.9324 ratings1.2% one and two star(603) 289-4663
Nick Tracey Roofing & Exteriorsproduct selection, new roof, quote process5.0312 ratings0.6% one and two star(603) 810-8658
Master Roofers | NHskylight replacement, professional crew, polite staff4.9245 ratings1.2% one and two star(603) 623-4973
Derek Cook's Roofing Specialists, INC.new roof installation, thorough cleanup, skylight replacement4.9212 ratings1.9% one and two star(603) 587-7663

All roofers in Manchester →

Where this page comes from

Every figure above is Google’s, captured on 24 September 2026. The star average and the 86 ratings behind it are counted by Google across all of its reviews. The review text on this page is a sample — we hold 86, of which 71 have any text — and it is not everything Google shows.

Roof Warden does not verify licenses, bonds, insurance or workers’ compensation cover, and nothing on this page should be read as though we had. Confirm those directly with the contractor and with your state or provincial licensing body before you hire anyone.