Recently, a new type of buildings with courtyards has been found in some southern and eastern Mediterranean cities. This kind of buildings presents a combination of various uses (habitat, trade and offices) in one building, where the courtyard is considered as a principal architectural and social element. This new type of courtyards doesn't play an efficient role in the environment regulation because of its form modifications. The Courtyard becomes deeper than the traditional one; this factor involves a lack of illumination on lower levels of building and reduces sunlight on the internal façades during wintertime. On the other hand and with the development of transportation, it became an important architectural solution to improve the acoustical environment. In this paper we discuss the effects of many courtyards forms in order to improve the illumination and acoustical environments. We find that the courtyard surface is the principal factor determining the level of illumination in the lower levels more than the variation of surrounding masses heights. On the other hand, some forms can control the noise level and the others increase this problem.