Color properties of external finishing materials on the apartment house in Tama new town area were surveyed. Colorimeter was used for the measurement of material surface color and color values a^*, b^*, L^* of external finishing of various apartment house were cleared. According to the results of the survey, it was found that the major hue value is yellow-red, lightness becomes low and a* becomes high with the increase of a construction period, total number of used color increased until the 1990 period.
