Buildings that support occupant happiness and productivity sound great. So what’s the catch? Occupant well-being and happiness is much harder to quantify compared to environmental factors such as energy efficiency. Also, there aren’t yet well-recognized rating systems, although the International WELL Building Institute is making some headway. But the bigger puzzle for the smart building ecosystem to solve is: How much do building conditions really contribute to occupant happiness? How should building investments be balanced with other areas such as IT?