This study evaluates the concept of affordances that constitute an environmental initiative in urban settings, which provide open spaces for people of all ages. The affordances are evaluated in two ways: objective and subjective affordances. The objective affordances address the potential possibilities of the spatial components that depend on the predicted and planned activity for users. However, subjective affordances are the unplanned affordances explored through users’ creativity and skills. Depending on the classification, the affordances of open urban spaces in Trabzon city center are examined in terms of its benefits to different age groups.The results have shown that the perception and evaluation of the affordances are different among age groups.