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Granite State Home Improvements We've been making homes beautiful and energy efficient for over 45 years. Whether your home needs new windows or doors, siding or roofing, a basement or bathroom remodel, or a small addition or deck, Granite State Home Improvements more than measures up to the task. We're certifiably good at what we do. And we have the certifications to prove it. This is especially important in New Hampshire because contractors aren't required to be licensed.

The certifications we've earned demonstrate that we have complete, up-to-date knowledge of the high-quality products we use and that we employ best practices when installing them.
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We have great confidence in our crews and their work, and in the products we use. We understand that without superior craftsmanship and high quality products, we wouldn't be where we are today. We pride ourselves in our low-key approach to sales. We prepare comprehensive proposals, offer all the necessary literature, and provide local customer references.
Granite State Home Improvements is an Elite CertainTeed 5-Star Contractor. This special high-ranking ensures you that only the best and brightest contractors will be working on your property. Granite State Home Improvements is certified through the Vinyl Siding Institute's Certified Installer Program.
At Granite State Home Improvements, we offer a variety of remodeling services to our customers that improve a home's beauty and energy efficiency. Our years in the business have taught us that remodeling your home can be a very big and stressful undertaking. To make the process as smooth as possible, we do our utmost to answer all of your questions and address any concerns you may have during each phase of your project. We realize how important it is for you to have high quality products to choose from.
Reviews (5)
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Christina Amodie
Jun 17, 2021
Loved everything that had to do with my experience with GSHI. I needed the deck boards on my 80' dock replaced. GSHI immediately jumped in to action. They helped me select with best materials and were there through the entire installation process. I will use them again for other renovation projects at my home. They are professionals in every way. It was like working with an old friend. I recommend them without reservations.
Pamela Bates
Jun 06, 2021
We were very happy with the service and work done on our home by Granite State Home Improvements, from start to finish. Peggy was thorough with assessment of our roof issues, and was responsive anytime we emailed or called. The team was awesome and had obviously done this many times before. Right on time, and made quick work of replacing the front side of our roof, which was older than our addition.

The team took the time to go over the area more than once to check for debris. Peggy came back the to check in and to also go over the area one more time for debris that may have been missed, though there wasn't any. We would definitely use Granite State Home Improvements again. I was happy to hand this home repair job off to the pros! Garrett Bates
Judy Acevedo
Apr 03, 2021
Side door Poor service, Long wait times, Slow response times, took several months to fix what could have been done in a lot less time if they new what they were doing its all on them paid them and i will finish the sloppy work cause im way over frustrated with the whole thing and very distrespectfull when people are in my home, Thats bad CS and not called for dont blame authers for your mistakes!
Anne Dolan
Jun 25, 2019
This company is very unreliable and unprofessional. I hired them in good faith in January and paid good money for work that wasn't done correctly or completely. There were repeated cancellations, delays and excuses. The job was started but still wasn't completed by June, the work done was sloppy and many mistakes were made. I let them know I could no longer deal with the way they did business and hired a reliable contractor to finish it. Check them out on BBB where there are other complaints as well.
TIm Snow
Jan 14, 2017
GSHI replaced the siding and my front door at my house, and I could not have asked for anything better! Professional, affordable, on time and on schedule, which are very important to me. I would recommend them 100%