An analysis of individual and organisational determinants of energy-related behaviors in office buildings and the interplay between the two is presented. Interviews and focus groups were conducted with office workers from four organisations in two Dutch provinces. The results indicate that, overall, work efficiency and productivity was prioritised over energy conservation. In general, self-efficacy was the most salient individual determinant, and social norm the least discussed determinant of current office energy-related behaviors. Nevertheless, both self-efficacy and social norm elements were encountered in employees' proposed strategies to achieve future office energy-saving. Formal and informal aspects of the organisational context were found to equally affect individual determinants and their related behaviors. Facility managers' and general office workers' views differed in a few but important ways. Interorganisational comparisons showed that differences in organisational foci were linked to the relative salience of normative, gain, and hedonic motivations.