Murtha Construction 1066 Prospect Ave, West Islip, NY11795 Murtha Construction is a family-owned and operated contracting company located in West Islip, serving the town and…More surrounding communities. Established by Michael Murtha, an independent contractor, in 1978, the company has grown into a full service home improvement business. With a customer base of over 1,500, Murtha Construction employs a staff of production managers, field supervisors, building directors, IT staff, as well as lead and junior carpenters. It maintains a large inventory of brand name products and a 10 truck fleet of construction vehicles. The company specializes in a variety of services, including the installation and improvement of windows, kitchens, bathrooms, extensions, heating, doors and extensions.