About Joseph T. Hardy & Son, Inc.

Joseph T. Hardy & SonJoseph T. Hardy & Son, Inc. was founded in 1921 in New Castle, Delaware. The company provides mechanical and electrical contracting services to commercial and residential markets in the Mid-Atlantic Region. Joseph T. Hardy & Son, Inc., has a full compliment of tradesmen that includes licensed plumbers, mechanics, electricians, carpenters, and construction superintendents. The remediation of hazardous waste and leaking underground storage tank sites is also part of the company's expertise.

Since 1921, three generations of Hardy family management have adhered to strong principles of innovation, performance and integrity while offering solutions in the mechanical construction field. Utilizing experienced managers and field super-visors as well as skilled mechanics, we provide reliable solutions to industrial, commercial, institutional and government market challenges.

Joseph T. Hardy & Son, Inc. maintains licenses to provide comprehensive plumbing, mechanical piping and electrical services to clientele in Delaware, Maryland, New Jersey and Pennsylvania. Public and private water main construction, in-line valve insertions, line tapping, fire service and hydrant installations are services that we have provided for 75 years. Hardy possesses the regulatory certifications required to perform the installation of above and below ground petroleum storage tanks, piping, pumps and leak detection equipment. We handle under-ground storage tank testing, epoxy tank lining and line testing.

Our services include but are not limited to:

  • Water main installations
  • Fire service and hydrant installations
  • In-line and valve tapping
  • 24 Hour Emergency Service
  • Petroleum tank and piping installations
  • Tank linings, closures and removals
  • Service station maintenance and repairs
  • Regulatory compliance consultation


  • American Industrial Hygiene Association
  • Institute of Hazardous Materials Management
  • Suburban West Realtors Association
  • Association of Professional Industrial Hygienists
  • New Castle County Board of Realtors
  • Coastal Association of Realtors
  • Indoor Air Quality Association
  • American Indoor Air Quality Council
  • Environmental Assessment Association
  • Pennsylvania Tank Installation Contractors
  • Delaware Contractors Association

Service Area

  • Maryland
  • New Jersey
  • Delaware
  • Pennsylvania
  • District of Columbia
  • Virginia

State of Maryland

We are a "Grade A" Maryland Contractor.
Maryland Home Improvement Contractor License (MHIC)#106929/131152

Office Locations