ACG Certified Commissioning Authority (CxA) Practice Exam

Planning and conducting new construction commissioning is a structured effort that validates that mechanical systems meet design intent, operate correctly, and perform as expected. The cost covers developing the commissioning plan, reviewing design and submittals, coordinating and witnessing tests, on-site verification, documentation, and training staff. On most projects, this work amounts to about two to three percent of the total mechanical system construction cost. This range represents a thorough level of verification without overburdening the project budget. If the project is unusually simple, the percentage can be lower; if it’s highly complex or requires extensive integration and performance guarantees, the cost can climb toward four percent or more, but the standard expectation for typical new construction sits at two to three percent.