Get matched with top water heater installers and replacers in East Hampton, NY

"Joe was great."

"They did not complete the effective job that they said they going to do."

"I contracted with Grant Heating & Cooling Inc. to install HVAC system in my home in the spring of 2024. They were very professional and did a very good job. In the winter of 2025 I had a minor problem with one of the Mitsubishi heat pump system units. The company was quick to troubleshoot the situation. The technicians were courteous, knowledgeable about the system and thorough. It required several visits to diagnose the problem and fix it. The manager, Nick was very responsive to the situation which required bringing out an expert from Mitsubishi. All of this work was covered under my warranty. The problem was fixed and I could not speak highly enough about the company’s policies and customer service. I would highly recommend them for all facets of their work and standing behind their installations. I am very happy to be working with them for my continued maintenance. They are an excellent company. Sincerely, Susan Coursey"

"Very professional, knowledgeable and trustworthy"

"Didn't show up on day scheduled, failed to call. Replaced ~$100 part in about a half hour. Charge was $595"

"Willing to work with schedule to make appointment Technician ran late but other then that he quickly and efficiently did the job"

"I called my fuel company to schedule an annual furnace tune up and was asked if my chimney was cleaned recently. It wasn't so Petro highly recommended calling Guaranteed Home Improvement. I did and spoke with Mark who made an appointment for a service call. Justin arrived promptly and did a thorough inspection of the exterior and interior of the chimney. He provided photos that were helpful as he described the damage in the flue and cautioned about the possibility of carbon monoxide building up inside the chimney. He was very knowledgeable, clear and concise as he explained that inserting a liner would divert smoke and heat from corroding the clay tiles filtering into the house. The photos of missing and disintegrated tiles at the base of the flue were enough proof for me. Justin answered my questions about the work, when it could be done, how long it would take, the cost, etc. The decision to go forward was a no brainer for me and as I was comfortable with Justin's responses and he arranged for a crew to come over within the hour. Charles and Taj arrived soon after and immediately began installing the liner in the chimney. They were professional, courteous, worked well together, and completed the work in a short period of time. Eric contacted me later to find out if everything was okay and I said I was completely satisfied. The entire process from the initial call through the follow up conversation from Eric was handled very well. In fact, everyone I interacted with at Guaranteed Home Improvement was friendly, professional, and fine examples of good customer service. The unsung heroes were the receptionists who redirected my calls. I am very thankful for the fine repair work and the peace of mind that came with it. I enthusiastically recommend anyone in need of their services to give them a call. Marvin"