by far the most reliable, professional contractor on long island. prices are reasonable too

Matthew was the project manager for our new extension. He drafted the plans and got the permits. The job came out great, and we are happy. I would reco Double Check because the price was fair and the workers took their time to do a nice job. If they can impress my husband, then they can impress anyone!

just wanna say joe at double check did a great job on our home! the crews were clean, quick, and professional. we would hire them again!

We had Double Check convert my garage into a bedroom. They handled everything, even things i didnt think about. It was such a great experience. The room looks so beautiful and i love the extra space. You cant even tell it was a garage in the first place.

I had double check re do my bathroom. It turned out so beautiful. They walked me through every step of the project and returned ALL my phone calls. We were able to add so much room to the bathroom after they explained that I could make a useless closet part of the bathroom. I would recommend them to anyone.

In March 2010 Double Check built a dormer on my house in Islip. We had a small cape and decided to build two large dog houses on the front and a full size rear dormer. We are so happy with the look and functionality of our new home. We worked with Matthew Walker from Double Check, he is the owners son. He was on the job everyday, answered all our questions, and made sure the work was done right. We are very happy, and our neighbors already hired Matt to finish their basement

double check builders built a 2 story addition on my home in ronkonkoma. I interviewed several builders, and was impressed with the knowledge of the town requirements and the proffessionalism dave w. showed me when i met with him origianally. double check's workers did an excellent job and it was clean everyday. the price was reasonable and my wife and family are so happy with our new home. Thanks!