To extend the life cycle of existing building stock to conserve resources, reduce waste, and reduce adverse environmental effects of new buildings related to materials manufacturing and transport.
Reuse the existing habitable building stock, achieving the greater of the following two benchmarks (based on surface area):
- 50% of one existing building structure (including structural floor and roof decking) and envelope (including exterior skin and framing but excluding window assemblies and nonstructural roofing material).
- 20% of the total existing building stock (including structure and envelope, as defined above).
Hazardous materials that are remediated as a part of the project scope must be excluded from the calculations.
For all projects
Do not demolish any historic buildings, or portions thereof, or alter any cultural landscapes as part of the project.
An exception is granted only if such action has been approved by an appropriate review body. For buildings listed locally, approval must be granted by the local historic preservation review board, or equivalent. For buildings listed in a state register or in the National Register of Historic Places, approval must appear in a programmatic agreement with the State Historic Preservation Office.
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