In DesignBuilder for the daylight simulation you have to impose a value for the parameter "margin", which is defined in the following way:
Enter the margin (in m or ft) around the zone boundaries where illuminance data is not to be calculated or included in summary results. This option can be used to help avoid inclusion of potentially misleading illuminance data close to walls and windows. A typical margin recommended by CIBSE is 0.5m.
What value is more appropriate for LEED?