Harold McMahon Plumbing and Heating was established in 1950 by Harold McMahon Sr. Harold McMahon, Jr. has been at the helm for more then 35 years and has helped to bring the business forward to match the unique needs of every home on the east end of Long Island from Southampton to Montauk. We cater to customers with any need in the plumbing, heating, and cesspool line of work in both residential homes and commercial businesses and no job is too big or too small. Service and customer satisfaction is our primary concern.

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Harold McMahon Plumbing and Heating has been a member of the Hamptons community for over 65 years. Our master plumbers and trained technicians have years of experience and keep up on certifications and training. We are proud to say most have been with us for over 20 Years. They and we are longtime members of the local community, dedicated to quality and enthusiastic about our profession – you can't find a finer organization to entrust with your project.