Psychological benefits from nature elements in the built environment find support in a growing number of empirical studies. Office workers who spend most of their day indoors lack direct contact with nature surroundings, and we question whether indoor plants in the office may work as psychologically restorative agents in the work environment. The study investigated what qualities the introduction of living plants into an office setting adds to the perception of and emotional response to the indoor environment. Assessments of both a real office and a photographic representation of the same office were conducted. Using two complementary methods of environment evaluation offering different experimental advantages, opens for better understanding of effects of living plants in our immediate surroundings. Study 1: On-site assessments of an office setting with flowering and foliage plants were compared to assessments conducted by two other groups exposed to a decorated, and a control condition (N =56). Instruments from Human Interaction Model (Küller, 1991) were utilised. The Semantic Environmental Description (SED) was followed by a scenario task introducing a self-report measure of emotional response to the environment (Basic Emotional Process). Study 2: Photos of the three environmental conditions were presented in a virtual reality theatre with a curved screen (7 meters width x 3 meters height, curving 160 degrees). Three groups of participants (N =51) evaluated all three pictures in different orders with the same instruments as in study 1, opening up for within-subject comparisons. Sense of presence was measured after the session. In study 1 the plant condition was described with more positive adjectives than the other conditions. When plants were present in the office, the room was evaluated as more pleasant and complex than being in the control condition, but not different from the decorated condition. Positive emotional response to the setting was predicted by perceived pleasantness, complexity, and percentage of positive adjectives. Due to the lack of difference between the plant and the decorated condition we could not conclude whether there was the plants’ quality as natural elements, or the added stimuli that altered the perception of the environment. The results from the on-site evaluation, providing ecological validity, will be combined with results from the photo-based evaluation (under analysis), offering both better experimental control and within-subject analysis. The complementary use of methods may contribute to the knowledge of effects of living plants in the built environment, and answer the question whether such modest interventions with plants can have a positive impact on well-being.