In order to maintain the character of a street, the setback of the house and treatment of the front yard should relate to the wider context of the street, and to the buildings on either side of the house. Fencing, landscaping and boundary treatments offer a positive way to acknowledge the existing context.
The right response to the street will differ depending on each location. The fundamental principle is to identify and respond positively to aspects of the street that are valued, and improve any aspects that are not.
In well established areas where large change is unlikely, the building setback should respond to the existing houses. In areas where large scale change is likely to happen it may be more appropriate to place houses closer to the street.