Evaluating daylighting effectiveness and occupant visual comfort in a side-lit open-plan office building in San Francisco, California

► Daylighting performance of an office building was compared to design intent. ► Physical and subjective measures were collected over six multi-week phases. ► Exterior facade shading devices were found to be insufficient to control glare. ► Open-plan core zones failed to achieve daylighting performance objectives. ► Occupants perceived daylight to be sufficient at levels below current thresholds.