Callahan Construction has been providing Glen Rock, New Jersey and surrounding areas with exceptional roofing and general contracting services for more than 20 years. Flat roofs, metal roofs, re-roofs, new roof construction—no matter what roofing service you need, our experts have the skills to get it done right the first time, and in a timely fashion. In addition to top-of-the-line roofing services, we also offer renovations, plumbing, woodwork, electrical work, and so much more!