GTM is a family owned & operated business with over 30 years experience serving the local community. The craftsmen at GTM, located in Ronkonkoma and serving all of Long Island and parts of N.Y.C., are remodeling specialists well recognized throughout the area for top-quality workmanship at reasonable rates. No matter what type of improvements you may have in mind, these experienced contractors will finish the work promptly and efficiently. From Room additions, new siding and interior renovations, to replacement windows and roofing, they do it all.