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A. J. Allen Mechanical Contractors is a rare, fourth-generation family business in Des, Moines, Iowa. We have been growing our reputation as commercial and mechanical maintenance contractors for over 75 years. We can help prepare your building site with excavation, installation and backfilling of plumbing, steam, water, gas and other utility piping. In addition, our welders are certified for medical gas installations, refrigerant handling, backflow prevention devices and reclaim work. We have experience working with special environmental conditions related to equipment and piping. This includes working with explosion proof areas, computer rooms, laboratory environments, operating rooms and greenhouses. When future warranty work is needed, or equipment operational questions arise, we have a ready group of knowledgeable technicians that can respond efficiently because they have been involved in the original installation and overall function of the systems. Our technicians are available 24-hours a day with plumbers, hydronic systems pipefitters, and refrigeration and HVAC work technicians available to meet your needs. Our team understands building codes and the proper interaction with enforcement officials. We are well versed in OSHA and ADA compliance issues in construction. Call today to learn more.

SpecialtiesOur vetting process is the best in the business. We protect homeowners from hiring the wrong contractor for your home improvement project, by asking,

The best way to safeguard your business from fire and keep occupants safe is by investing in a fire protection system. Ahern provides complete fire protection services to the Des Moines area and has a proven track record of success. With approximately 1,700 employees, our team of experts will ensure that your system is installed correctly the first time and is kept up-to-date.