Your Trusted Home Improvement Experts

From Our Family To Yours

Quality Craftmanship You Can Count On

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Quality. Reliability. Excellence.

Quality You Can See,
A Name You Trust

Transforming Homes

For 25+ years, Alexander Home Improvement Corp has delivered top-quality roofing, siding, windows, doors, and custom renovations across Nassau and Suffolk Counties. Fully licensed, bonded, and insured, we are a family-owned and operated company that takes pride in our craftsmanship, clear communication, and commitment to your satisfaction. Whether you’re upgrading your home’s exterior or building something brand new, AHI is here to bring your vision to life, on time, on budget, and built to last.

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Flexible Financing Options

Dream big—without financial stress. We offer flexible financing to make your custom home or renovation more affordable. Ask us how to qualify during your free consultation.

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Services

What We Do Best

Roofing

Protect your home with durable, high-quality roofing systems designed to withstand the elements. From residential to commercial roofing, we offer reliable installation services.

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Siding

Choose from a variety of siding options to elevate the curb appeal and energy efficiency of your home. We provide installation, repairs, and full replacements tailored to your needs.

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Windows

Enhance your home with energy-efficient windows and skylights. We offer custom solutions designed to improve natural light, ventilation, and insulation.

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Doors & Door Surrounds

Upgrade your entryway with stylish, durable doors and door surrounds. We specialize in custom installations, from traditional to modern designs, ensuring your home’s entrance makes a lasting impression.

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Porticos & Gables

Adding architectural features like porticos and gables can instantly elevate the look and feel of your home. These classic design elements not only boost curb appeal but also add character, charm, and functionality.

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Custom Home Building

Looking to expand your space? We specialize in custom additions and renovations, from basement finishing to kitchen remodels, to fit your growing needs and lifestyle.

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Awards & Accreditations

Proudly A+ rated by the BBB, and CertainTeed certified, and backed by hundreds of 5-star reviews, we’re committed to quality, safety, and trusted service.

Testimonials

what others have said

      EXCELLENT  
   Based on 219 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Lev Aminov 
 May 1, 2025
 
 
 Trustindex verifies that the original source of the review is Google. I wish I gave give this company 10 stars. My experience with them was great. Alex came to give me an estimate that was very reasonable compared to the other roofers I invited for a quote. He explained all the details and Alexis of the project. He offered very good financing terms that met our budget. While other roofers claimed they would take 4-5 days to complete my project, his team completed the job in 2 days. There was great communication from everyone on his management team. Special thanks to Arnold and Santiago . Thank you all so much.
  
 
      Posted on Google  
   
   Khloe D 
 April 29, 2025
 
 
 Trustindex verifies that the original source of the review is Google. I recently hired Alexander Home Improvement for a roofing job, and I couldn’t be more pleased with the experience. They offered a fair price, and their team delivered quick, high-quality service without cutting corners. Communication from Alex was excellent, responses were prompt and professional from start to finish. It’s clear they take pride in their work and value their customers. I highly recommend them to anyone in need of reliable and efficient roofing services.
  
 
      Posted on Google  
   
   Dan Ismailescu 
 April 24, 2025
 
 
 Trustindex verifies that the original source of the review is Google. We hired Alexander and his crew to replace our roof from scratch. We decided to hire them after positive feedback from many of our neighbors who had recent very good experiences. And we are happy we did it! The entire job took between 8am-5pm. One day!  We are very pleased with the results. Extreme professionalism for a reasonable price. They left the place cleaner than it was before. Alexander is directly involved as he personally supervises and directs his workers. I would strongly recommend Alexander Home Improvement to anyone interested in roofing projects.
  
 
      Posted on Google  
   
   Hector Maltes 
 April 23, 2025
 
 
 Trustindex verifies that the original source of the review is Google. Excellent work  !! I’m very satisfied with the outcome of the job .Marvin was very prompt and very professional throughout the entire process of getting a new roof in my house ,he was very reasonable with the price and what I love the most that he was on site to supervise the work to make sure everything was done right
  
 
      Posted on Google  
   
   James Yohannan 
 April 21, 2025
 
 
 Trustindex verifies that the original source of the review is Google. We had the absolute best experience with Alexander Home Improvement. Marvin and his team were so professional and made the entire process so easy. Marvin and his team were so knowledgeable and an absolute pleasure to work with.
  
 
      Posted on Google  
   
   Marek B 
 April 12, 2025
 
 
 Trustindex verifies that the original source of the review is Google. We recently had our siding and roof done, and I couldn’t be happier with how everything turned out. From the start, the team was professional, friendly, and easy to work with. They showed up on time, kept everything clean, and really paid attention to the little details. The quality of the work is top-notch—our house looks amazing now and I feel so much more confident going into the next season. It’s not always easy finding people you can trust with your home, but these guys really delivered. Highly recommend!
  
 
      Posted on Google  
   
   Hannah Mutum 
 April 7, 2025
 
 
 Trustindex verifies that the original source of the review is Google. We had the absolute best experience with Alexander Home Improvement.  Marvin and his team were so professional and made the entire process so easy.  We had issues with our Window Contractor and Marvin even completed their scope of work for us just to keep us on schedule.  Marvin and his team were so knowledgeable and an absolute pleasure to work with.  Our house looks completely different and we couldn’t recommend them enough!!!
  
 
      Posted on Google  
   
   Cecily Portillo 
 March 30, 2025
 
 
 Trustindex verifies that the original source of the review is Google. From start to finish Alexander Home Improvement went above and beyond. What initially sold me to proceed with this company was their office manager, Arnold Cruz. When we initially spoke, I explained that we are new to living in an incorporated village with construction regulations and he said not to worry. Within the same week the team sent over a detailed proposed contract of the work to be done that was totally reasonable and  in budget. Arnold was clear, informative and always prompt even with the smallest updates. His sense of urgency to expedite permits, inspections and working with village truly put us at ease.  Now at the forefront, Marvin (owner) and his team executed our vision with our portico and stoop.  Marvin was very much involved with the project and always kept us updated. Every trade had high craftsmanship and payed attention to the smallest details. We passed every inspection and the village was more than pleased with the work. The best feeling is when all the neighbors stop and ask for recommendations, so yes 100% recommend Alexander Home improvement.  Just honest reliable contractors and passing that along to all homeowners. Thanks
  
 
      Posted on Google  
   
   clara Yu 
 March 27, 2025
 
 
 Trustindex verifies that the original source of the review is Google. I compared multiple contractors and finally chose Alexander Home Improvement to replace my roof and 4 skylights.They are professional and the price is reasonable. The roof has the best warranty. Marvin is very confident and cheerful.  In general, I am happy with whole job they did and recommend them.
  
 
      Posted on Google  
   
   Louis Letterill 
 March 24, 2025
 
 
 Trustindex verifies that the original source of the review is Google. I was very impressed with both the professionalism and quality of workmanship.I met Marvin who explained in detail about the work I needed done. He later sent me photos of work in progress. The whole job was completed and grounds cleared 24 hours after I signed the contract
  
 
  
  
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more