As energy efficiency continues to become the highest priority in construction and building operations, more complex equipment and solutions are emerging that promise reduced energy consumption, reduced waste, and better operation. Though greater levels of energy efficiency are enabled by more advanced solutions, efficiency is only achieved if these solutions operate properly. The complicated construction process of buildings as well as their maintenance and operations can lead actual performance to drift away from the intended design. Additionally, there are times when the original design may not have properly accounted for the real-world applications of the building. Building optimization and commissioning services are a tool to ensure operational and energy efficiency. Initially originated in the United States and United Kingdom in the 1960s and 1970s as a quality assurance measure for new buildings, commissioning has experienced rapid growth through the promulgation of green building certification programs over the past decade. More recent policies and regulations requiring commissioning of new construction and existing buildings has further reinforced this growth. In turn, the savings building owners have achieved through the commissioning process has further driven demand for such services. According to Navigant Research, global revenue for building commissioning services is expected to grow from $2.7 billion in 2014 to $6.6 billion in 2024. This Navigant Research report examines the global market for building optimization and commissioning services, including initial commissioning, retrocommissioning, and monitoring-based commissioning. The study explores the market drivers and barriers related to optimization and commissioning services in detail, along with global demand-side dynamics. Global market forecasts, segmented by service type, building type, and region, extend through 2024. The report also analyzes future technology trends in commissioning services and profiles the key industry players.