Self-administered questionnaires were used to find out the prevalence among employees working in the three local authority premises in a Health District of self-reported illness which could be associated with sick building syndrome. Eye symptoms were found to be more common among employees working in a typing centre using VDUs. The symptoms tiredness, lethargy and influenzalike ('flu-like) illness, including aches in the limbs, were reported in significantly higher numbers by employees working in areas where there was evidence of increased pressure of work and worries over job losses. Dry throat and blocked or stuffy nose were symptoms reported in significantly higher proportions by employees working in certain buildings, where anecdotal evidence suggested that there could be problems with temperature regulation. This study also confirmed findings by other studies that for some symptoms women complain in significantly higher numbers than men. It was concluded that the type of work people do, in addition to the type of building they work in, play an important role in self-reported illnesses. Causation of sick building syndrome is complex and probably of multifactorial origin.