About Us

John Joseph Contracting, LLC


John Joseph Contracting (JJC), a woman-owned and operated DBE business, specializes in a variety of different aspects of the mechanical/plumbing industry. Since our founding in 2002, we have serviced the needs of clients in the DC Metropolitan and surrounding areas. Our skilled team of technicians bring more than 40 years of experience to our company. JJC technicians coordinate jobsites to make sure the owners are getting the best quality of work in a timely manner. JJC also helps to design systems to ensure effective and efficient results. Our in-house estimators use the latest technology (such as Trimble’s Autobid Mechincal estimating software) to ensure our pricing is always competitive and fair. This top-of-the-line software is ideal for commercial mechanical, piping, and plumbing pricing, and allows us to bring the most competitive pricing to all of our clients. At JJC we believe that you should never sacrifice quality for quantity. Our various areas of expertise include but are not limited to the following:

  • Installation
  • Maintenance and Service
  • Process piping
  • HVAC systems
  • Domestic water
  • Non-potable water
  • Sewage ejectors
  • Duct less mini splits
  • Waste/vent piping
  • Backflow devices
  • All plumbing fixtures and all plumbing appliances.