The C.3 and C.6 Development Review Checklist captures a formal calculation of existing, new and replaced impervious surface at the project site. The completed form is required for all projects requiring a Planning or Building permit that would result greater than 150 sq ft of new or replaced impervious surface. A completed form is required to be submitted at the time of permit application. If the project involves the development if more than one property at a time within properties owned by a common property owner one form shall be completed for all properties involved in development.