Electrical and Mechanical Construction services for ease of mind.

HR Allen provides electrical and mechanical construction services that range from renovation and improvement of existing facilities to new projects that meet existing standards and provide for ease of renovation and future operations. Examples of our electrical work are at the Hollings Cancer Center in Charleston, the Roper Mount Pleasant Hospital in Mount Pleasant South Carolina, the Springmaid Hotel in Myrtle Beach South Carolina, and all manner of schools throughout the state.

Our mechanical operations include medical facilities including the Hollings Cancer Center in Charleston, the Little River Medical Center in Myrtle Beach, and the Roper Hospital in Charleston. We have also worked in schools such as West Ashley High School, Frazier Elementary School, and hotels such as Marriott’s in North Charleston.

The company also furnishes electrical service support throughout the Charleston area. Our technicians make sure that all completed projects receive the warranty support required to ensure the projects continue to perform properly as well as other support for additional customers such as banks, restaurants, and other facilities requiring electrical work.

Electrical Services

Our work on new construction, renovation, and service projects marks us a company that our customers trust and continue to seek out for their difficult, complex electrical installation and repair needs.

Key Benefits

Since its inception H. R. Allen Inc. has proven to have the experience in the construction industry to  provide the knowledge and expertise required for all electrical installations. Project Managers, Estimators, and Superintendents who understand and identify with designers and owners attempting to complete complex projects effectively and efficiently. Trained, experienced, and motivated staff providing prompt service to existing and new clients.



From the General Nutrition Product warehouse in Anderson, to the Wal-Mart in Ridgeland, H.R. Allen, Inc. has consistently proven our ability to work with commercial owners, meeting compressed schedules and completing quality work on time and within budget.


An experienced electrical service department can maintain what we install from warranty through the life of the equipment.


With home offices located Charleston, we have extensive experience in renovations for commercial and industrial owners. MUSC, the Federal Courthouse and Logan Elementary School are examples of renovated/updated buildings with electrical work completed by H.R. Allen, Inc.

Mechanical Services

Serving customers since 1979 with plumbing, HVAC,  refrigeration, process and medical gas piping. There’s no better feeling than knowing a project is in the right hands. Every year, hundreds of companies experience that confidence by relying on H.R. Allen, Inc.   Installing stainless or carbon steel piping, HVAC, or insulating materials, we deliver the expertise, integrity, and accountability that our customers expect.

Key Benefits

A full service, one-stop resource for all your HVAC, Sheetmetal, Plumbing, Piping, and Insulation needs. Professional electrical and communication support enable our technicians to offer a full range of troubleshooting and installation and repair services.  Design build a specialty, HRA provides  expertise in planning, design, fabrication, and installation professionally, economically, and efficiently. 



Design/Build/Installation/Service/Repair including installation and certification of Backflow Prevention; Boilers; Chillers, (Absorption/Centrifugal/Scroll/ Reciprocating); Pumps;  Condenser Water Piping; Medical Gas Piping; Pipe Fabrication/Certified Welding; Process and Refrigeration Piping; Roof Drains/Drain Leaders/Storm Water Systems; and Stainless Steel Piping.


Design-Build, Install, Service, Repair, Air Balance, Air Compressors Piping;  Computer Environment A/C Systems are all within the capabilities of our mechanical construction and service department. 


HVAC And Chilled Water Systems;  Fabrication; Storage Tanks, Vessels; Steam And Condensate Systems; Boilers, Breechings;  Refrigeration; Acoustical Insulation;  Oil And Process Systems;  Air Handling Equipment; Fireproofing Per UL Code; Duct Work.

Let's get started

Contact us today about your project. We’ll work with you to find the best solution .