In a survey of 60 lower and upper SES houses in Ankara, li ving rooms were evaluated by householders and architects using a Spaciousness -'Crampedness' Scale (s-c-s). The re sults of ANOVA indicated significant differences between the evaluations of the architects and the householders, as well as between the two SES houses. The evaluations of the upper SES living rooms were more'positive than the lower SF5 ones; independent of SF5, householders rated the inte riors more positively than the architects. Since 9 of the upper SF5 householders were architects, a further analysis was carried out to clarify whether the differences found between the architects and householders reflected mainly user-nonuser or professional differences. The results in dicated that there were no significant differences between the ratings of the two architect groups. However, these two professional groups evaluated the living rooms diffe rently on S-C-S factors: householder architects assessed their living rooms as being more appealing but not as well planned.