when I have an addition project do I have to demonstrate compliance for the new addition and renovated areas or does it have to be applied to all areas? (existing to remain, renovated and new) We are creating an addition that is around 30% of the existing area including a few restrooms, but most of the restrooms are in the existing to remain area. Since only the new area will include high efficiency fixtures Im not sure if we will be able to meet the 20% efficiency requirement.