A call. A company. A family business in which you can trust. For more than six decades, the name of Joseph Frederick & Sons meant the best of plumbing, heating and residential and residential systems. Our approved electricians and plumbers are known for their quality work and their personal touch. Joseph Frederick & Sons has designed and installed hundreds of residential and commercial systems and provides maintenance and service for many others. We make sure of the best system operation throughout the year available today. Joseph Frederick & Sons pursues a family tradition based on three generations of quality products, quality workforce, integrity and service to houses and businesses in northern Delaware. Joseph Frederick & Sons also added a bathroom and a kitchen to our service line. Our designer has over 20 years of experience. As with all our services, it expects high quality trades.