Date
Inquiry

For the Blanchard College Center project, we are asking the USGBC to clarify the criteria for declaring whether a building is New or Existing in relation to the available points for this credit. In the specific case of the Blanchard College Center, the project is primarily a gut renovation of an existing historical facility, to which two new additions will be added. The area of the existing facility is approximately 33,403 s.f. The area of the two additions totals approximately 13, 885 s.f. The additions therefore represent approximately 29.4% of the total building area. From a systems standpoint, approximately 95% of the existing shell will be reused, however, there will be new furring/insulation for the walls and roof, new lighting, and new mechanical systems. We are assuming that this facility qualifies as an existing building, primarily because the existing facility represents the majority of the overall square footage of the project. In addition, the efforts to preserve the form and shell of the existing building has restricted the designer opportunities to pursue more aggressive energy reduction strategies (e.g., building orientation, daylighting/ventilation strategies, high performance envelope, etc.). Please clarify that this is the correct assumption for this project.

Ruling

THIS LEED INTERPRETATION HAS BEEN REVISED AS OF 9/21/06 TO PROVIDE A CALCULATION THAT IS MORE WIDELY APPLICABLE (AND IS EQUIVALENT FOR THIS SCENARIO). To calculate the optimization point table for a project that has both existing and new construction, use the following formula for each line of the table: target percent = (existing SF / total SF) * (existing percent) + (new SF / total SF) * (new percent) *This equation applies to LEED NC v2.0, v2.1, and v2.2 and LEED CS v2.0 ORIGINAL LEED INTERPRETATION 9/5/01: To calculate the optimization point table for a project that has both existing and new construction, use the following formula for each line of the table: existing percent + ((new SF / total SF) * 10) = target percent. Applicable Internationally.

Internationally Applicable
On
Campus Applicable
Off
Credits