The double standards by the planting agreement based on the preservation law of urban green and the building agreement based on the building standard law contributes mainly to greening of detatched housing area. The most important item influencing effect of planting among items of the agreements is the structure of hedge or wall. The correlation between effect of planting on hedge or wall of roadside in housing site and application of the structure of hedge or wall of the items was made clear through the research on the actual condition (79 detatched housing areas of the double standards). Also, the correlations on effect of greening between the structure of hedge or wall and another 8 factors (set back distance, lot scale, developer, conclusion method, topography, area scale, sanction age, regional differences) were made clear.
