They performed an annual free inspection, and I was very impressed with their professionalism. They did a thorough inspection at no charge. At the end, they showed me photos and said the chimney was very clean and didn't need cleaning. They did mention that the mortar is starting to erode and that they would send me a quote, but it's probably not something I'll do right away. read more

Mike is one of those rare service professionals who truly cares -- not just about the job, but about his customers as people. From the very start, he takes the time to listen, understand your concerns, and address every issue with patience and skill. What really sets Mike apart is that he goes above and beyond the standard service call. He stands firmly behind his work and the jobs he's done, ensuring you feel confident and cared for long after the project is complete. If you need anything related to chimney repairs, liners, cleaning, caps, or masonry work, the choice is easy. You know who you gotta call -- and no, not Ghostbusters! Call Mike from Guaranteed Home at (866) 528-1324. read more

Victoria was kind,efficient and very helpful! She gave me all my options and pricing for the work I needed done. The guys came out and they did a quick, clean and good job capping my chimney. And...all was done at a vey fair price! Again...Victoria was very helpful and I was happy with the work they did. I highly recommend them! read more

Never even arrived...the initially confirmed a window of 1-3, then 1-6....and morning of the appointment they requested 10-3. Then at 2:45 I receive a call saying they won't make it and if the can reschedule. Save yourself the time and find someone else. read more

Amazing work and great customer service all around. Clean job site too. Detail on chimney repair to inner and mason work.

I highly recommend Ramirez Landscaping, Kingston, NY. They redesigned my back deck with rock walls and matching stone pavers. Their design and craftsmanship are outstanding. ​ read more

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Low-end employees, the lead person, is very inresponsable, poor workmanship, he leave trash debris in neighborhood yards. Very inresponsable. read more

We had Guaranteed Home Improvement come to our home to clean our chimney and wood stove flue. They did a wonderful job on that, but unfortunately something go broken on the wood stove in the process. I immediately got a call from someone at Guaranteed who apologized and offered to pay for the repair. They followed through on that and the wood stove is as good as new. It's not always easy to find a company that stands behind its work and cares about the customer. Guaranteed Home Imprrovement is a solid and professional company. I recommend them 100%! read more

On April 25, 2025 Mike inspected my chimney and provided pictures to show why he was recommending that I have a streel liner inserted. Walter installed the liner the same day. Both Mike and Walter were professional and honest. Walter, along with one other worker, were both thorough and CLEAN. They jack hammered my basement cement wall and left behind a clean floor and expert cement repair job. A representative called me the next day to ensure I was satisfied with the company's work. I give this company 5-stars. read more

Recommended by Petro for free inspection of chimney. Called before they arrived, said liner should be replaced. Showed pictures of existing liner. Price for service was very fair. When work was completed, we were very happy with the quality of the work performed. Would recommend. read more

Absolute Profession. From the gentlemen who did the work, to the office. Price for work was also 100% Fair. I would absolutely recommend this company over and over. Jo-Ann read more

As a customer of Petro many years now,they in recent years started to suggest Guaranteed to inspect our chimney for free I initially said no as several years ago they wouldnt leave me alone ,calling every week for a year...This time i had them over...the guys were pleasant enough,showed me pic but knew i was fairly knowledgable and asked specific questions on materials and procedure...i got vague answers...specifically the gauge of the liner used...He did not know...RED FLAG with me!....He still wanted to perform a reline,obviously with the one unknown material already in their truck...Pictures were taken and shown to me and and he left the venting pipe off the wall thinking id bite on the job ,i didnt.....Low and behold the pics promised to my email never arrived( checking mail and spam)...I will never make a rash decision on a job with question marks still remaining...Also i was show pics of their masonry work and pointing....wasnt impressed! read more

Excellent customer service, with thorough inspection, photos, explanation of work to be done. I would recommend Guaranteed Home Improvement for chimney repairs. They are professional, easy to communicate with and courteous. read more

Tried to play one of my mentally ill clients. This company came and inspected my client's chimney and told her that she needed $ 2500 worth of work. They did not write a contract for her, but said a crew would be there the following morning. Not acceptable. If I had not intervened, she would have gotten scammed and been in great debt for unauthorized work. read more

My oil burner chimney needed a liner. It was slowly degrading. Guaranteed provided me with pictures of my chimney and took the time to explain what needed to be done and why. They showed me pictures before and after! Their price was unbeatable. They were clean and professional. I didn't have to wait around all day for them to come. They even called 1/2 hour before they showed up. read more

Lana and Edwin were great. Clear communication and addressed all of my questions. Also, the job was handled quickly and cleanly.

They used high pressure sales tactics to scare the sh*t out of my disabled and elderly father to get a chimney liner. There was no emergency. A different employee raised his voice at me when it was time for my father to pay and he was AWOL for only a minute. they got paid a lot of money for only an hour of work, but couldnt be bothered to phonecall him. When you court disabled/elderly people like that, you need to use some patience. read more

They are a trustworthy business in a not so trustworthy industry. They give you good advice but do not push for unnecessary repairs. Scheduling is extremely professional they follow up right away to get you on schedule and touch base ahead of time to make sure that the schedule still works for you. The workers arrive on time and are professional, neat and respectful. read more

It is essential that you get another estimate. If, like they did with us, they come late in the day and tell you they can put a new liner in right then, SEND THEM AWAY. They are twice as expensive as anyone else and install whatever liner is In their truck whether it's the correct size or not. read more

Sleazy business practices. Recommended by my home heating oil firm. They did the inspection. Met the guy outside who showed me a picture of inside the chimney and claimed it needed a new flue. I asked him about risks etc and whether it could be delayed. I asked how much it would cost. He said 2500 or so.I told him to send me the pics and I would decide later. I didn't agree to any work, didn't sign anything and left to do some errands. My intention was to check in with my contractor too see if this was legit or a scam and get a competing quote or two. I came back an hour later and saw a worker on the roof pushing a new flue pipe into the chimney!!!!! I demanded they immediately stop and reverse the work which they did. They totally tried to railroad this. No paperwork....No waivers....no idea if they were insured to be on my roof.....horrendous. For all I know they could have damaged the chimney or the burner Would good 0 stars if it was an option read more

My fireplace needed its yearly service cleaning. They came out next day. Been using their services for years and I could not recommend them enough. Highly professional and skilled. read more

Took them a while to get back to me after initial quote but they were professional and quick. Cleaned up nicely too. Did a great job - so it was worth the wait. read more

Vince and company has proven that they have the best interest of their clients in mind. and have been proven to be an honest and respectable company. thanks again read more

Taj, who led the team that installed a new lining in my chimney, was excellent and knew exactly how to handle a snag in the job--and how to explain it to me. I felt confident in the service because he was so capable. read more

Excellent service. Diagnosed the issue. Worked quickly and efficiently. Installed 6" stainless steel lining system w/double tee, tee cap, top plate, storm collar, and round cap. Applied tar onto flashing. Applied silicon etween house and chimney. Customer service couldn't have been better. Would recommend highly. Thank you Harmony Home Concierge of Petro for the recommendation. read more

From scheduling, to expertise, to work performed through follow-up, this was the type of customer experience that every business ought to aspire to. BRAVO! read more

Excellent people doing a great job. Their work was done in a professional manner. They diagnosed a potential problem. The interior of the chimney was deteriorating. The stainless steel double walled sleeve is now in place thus preventing a disaster had the tile broken and blocked the chimney. A potential tragedy. I recommend them without reservation read more

They were prompt, neat, competent, polite and friendly, and totally professional. They also came with enough workers to finish the job quickly. As for being professional, they took and showed me pictures of my long-neglected chimney, and why the work was needed. A lifetime warranty is sure good, too. read more

I have been a customer of Petro Oil and its predecessor (Love/Effron) for over 40 years.   When I signed up for my annual oil contract this year, Petro offered me a free chimney inspection.  I accepted the offer and scheduled it with a company called Guaranteed.  They came as scheduled, did an inspection at both the boiler pipe and the roof.   They told me my chimney tile and mortar joints were deteriorating, it was dangerous in its current condition and that I needed a steel pipe insert.  They said they could do the work immediate with a back-up truck that was following them.  They began the cost estimate by showing me an on-line nation-wide cost estimating calculator and then gave me a "customized estimate", verbally not written.  When I told them that I was not going to sign up for the work w/o a second opinion, I was offered a $200 - $300 cost savings. I called Petro after the encounter, the office person told me about her personal experience with chimney inserts and I asked to speak to a technician.  The technician called me the same day, said he stood behind Guarantees as a reliable company and also recommended a second opinion.  I then called a local company who has been doing chimney cleaning and repair for 3 generations.  They cleaned my chimney and told me the chimney was in good shape and did not need an insert and that the draft in the chimney was excellent.  He did adjust the damper which was not opening fully. read more

Courteous, professional, clean, and completed my needed services! On time! Gave a 1-6 window at time of scheduling. Called the day before to confirm, the morning of, and 20 minutes prior to arrival. Everything was neat and clean. I highly recommend GHI! read more

Happy customer!!! They came to my house this past week to fix a problem that I had with my chimney. They were very respectful of my time, very professional and they did a neat beautiful job. I highly recommend them!!! read more

Gena and Mike F. Had an emergency over the weekend. After firefighters, National Grid, plumber determined it was my chimney called this company and they immediately responded. Showed up within the hour on Mother's Day and determined the problem and replace and repaired our chimney sleeve with upgraded materials. Work was done professionally and neatly. Would highly recommend this company. read more

Get another estimate before hiring this company! I had 2 other estimates before they came. The quoted me a price more than double both other estimates from highly rated companies. When I told them I could get the same job done for less than half the price, they asked me how much I was quoted. They claimed the other company would ask for more money once they started the job. I told them that was not going to be the case, the price was for a complete job. They them agreed to do it for the same price I was quoted by the other company, which was less than half of what they originally asked for. Unbelievable! Don't just them without shopping around first, even though they may have been recommend by your oil company. read more

Professional company. Fixed my dilapidated chimney which was leaking water into the attic. Neat and clean. Would definitely recommend these people. read more

They came an inspected my chimney. Very honest and professional. I didn't need a cleaning. And surprisingly it was in fairly good condition. They suggested a chimney Cap, ironically so did the home inspection said when I bought the house 17 yrs ago. I had them install a cap. Very fair price. I was worth it being I got it off my list an didn't have to do it myself. Rick was a very honest nice guy an I received a call from Charlie after the job thanking me. Both gentlemen we're honest and professional. I highly ecommend them. read more

I haven't had any work done by them. But they inspected my chimney. They said I have low draft. Another technician said it was nothing to worry about. They called me after a few months had passed and offered another free inspection. After the inspection the called me multiple times trying to get me to service my chimney with them. The only reason I allowed them back in for a second inspection is they claim to have been contracted by my oil company for free inspections. I don't need arrogant sales techniques for me to use your service ....... read more

I have my head in my hands. I wish I had seen these reviews ahead of time. They play you like a fiddle. Yeah, the work is done but the business practices are every bit as sleazy as stated by previous yelp reviews. And, your oil or gas company doesn't have your best interests in mind when they refer Guaranteed Home Improvement. I'm disgusted that I bought into their crap. read more

I had my boiler tuned up by my oil company and was told I needed my chimney cleaned. I was given the name of Guaranteed Home Improvement. When I called I was given an appointment 6 weeks away from when I called but didn't worry since they were recommended by my oil company which I had been with for years. I receive a call the evening before they are supposed to come saying that because they are doing only emergency work and they can reschedule me for March. So I decide to find another place so I don't become one of those emergencies. I wouldn't use them since I understand being busy but I made the appointment 6 weeks ago and they consider my time so invaluable they call up the evening before so now I have 1 wasted vacation day. read more

If I could give 0 stars I would. Completely ridiculous! I made an appointment which they rescheduled 3 times and on the 3rd time they tried to reschedule after they were supposed to be there by calling me at 5:27 (service window was 12-6) by telling me that I actually didn't even need a cleaning because I just had a liner done? Nope. Actually, I didn't. No thanks, horrible experience! read more

We called this company for a chimney inspection for a home we just purchased thinking they were going to tell us that it indeed needed cleaning and maybe some other problem. When Mike and his crew arrived they performed their inspection but didnt get far, a previous owner had placed a turbine at the top of the chimney (the damper had been removed during that time, we assume) and it was cemented in. Mike suggested that as long as we dont use the chimney excessively the chimney cleaning could wait since it would have been a $600+ job to remove and redo the top section just to clean it. We went downstairs to check the boiler's connection to the chimney and Mike was disgusted that our home inspector didnt write up the lose exhaust that moved away from the wall without much effort at all. He proceeded to explain to us in detail about the safety hazards, what liners were previously used and why stainless steel liners are now the norm. He stuck his hand inside the wall and pulled out large chunks of the old clay liner and told us that it was important to have this fixed asap to avoid problems. Mike stressed that it was so important that it didnt matter which company we chose for the repairs, we should not go longer without this work done. We decided to just go with Guaranteed Home Improvement for this work and are glad that we did, even including the chimney sweep and removing the turbine and reinstalling a new damper! Mike and his team were very respectful, very professional and above all very patient with all of our questions. They even made sure to light a fire with some firewood we had stored away to make sure all was working accordingly. I just want to say a huge thank you to Mike and his crew! Please keep up rhe excellent work! read more

Guaranteed Home Improvement - Very happy with Mike and his team. Very professional, courteous and patient. Thank you for your professionalism. - General Contractors Near Me - Bethpage, New York