Before a building is enlarged, the needed functions an addition is meant to address should be evaluated to see if they can be accommodated within the existing structure. An addition, when needed, should not visually overpower the existing structure. If an additional floor is to be constructed on top of a building, it should be set back from the main facade to minimize its visual impact. To avoid compromising the integrity of historic buildings, additions should not be made to look older than they are. New construction should be differentiated from the old while still being compatible with the massing, scale, and architectural features of the original building.
Replicas only confuse the importance of the original architecture.
Additions should be constructed so as not to impair the essential form and integrity of the original building. This contemporary connection between two historic structures clearly differentiates its period construction while being compatible to its setting.