When a building is initially commissioned or retro-commissioned, it undergoes an intensive quality assurance process that begins during design and continues through construction, occupancy and operation.

Comprehensive Approach

We believe that testing a small percentage of building systems leaves a wide margin for failure.  Our intent is to verify and document the proper operation of all equipment through detailed test procedures and closely followed protocol.


United Building & Energy Services commissioning agents have completed projects that encompass a broad range of facility types, including schools, hospitals, data centers and office buildings.  Our agents have the knowledge and experience to identify issues and communicate effectively with owners, design teams and contractors.

Commissioning Report

After completing building commissioning, re-commissioning or retro-commissioning, we prepare a final commissioning report.  The report thoroughly documents all procedures performed by the commissioning team and results of the commissioning process. United is known for delivering reports that illustrate and describe our methods and conclusions thoroughly and accurately.


Also known as existing building commissioning, retro-commissioning is intended for buildings that have never undergone the commissioning process.  Like total building commissioning, retro-commissioning ensures that an owner receives a building that functions according to its design intent and current operational needs.

Why Retro-commission?

Buildings that have never been commissioned can suffer from a host of problems, such as high energy costs, poor indoor air quality, inefficient system control, excessive maintenance and comfort control issues.

During retro-commissioning, United’s CxA team evaluates current systems performance, analyzes data, develops a solution based on a plan to optimize building performance and then documents the entire process.

Key Benefits of Retro-Commissioning

  • Lower energy consumption
  • Enhanced indoor quality
  • Improved occupant comfort
  • Fewer maintenance concerns