The T&C robot, Intelligent Site Assistant-One (ISA-I) was developed to perform testing and commissioning tasks in construction sites. It can carry out scheduled site inspections and measure indoor environmental quality (IEQ) & illuminance. Data collected by the robot is transformed into electronic site records for the engineers’ reference. With a special wheel design, it can operate on various terrains and can be controlled locally via a robot control interface. Encompassing an AGV chassis system, a control system, an inspection system, and a sensor system, the robot is a valuable tool for construction projects at the testing and commissioning stage.