LEED AP Building Design and Construction (BD+C) Practice Exam

When renovating an abandoned or blighted building, what percentage of the building must be maintained?

1. At least 25%

2. At least 50%

3. At least 75%

4. No minimum required

The correct answer is: At least 50%

In the context of LEED certification, particularly when working on renovations of abandoned or blighted buildings, maintaining a significant portion of the existing structure is crucial for various reasons, including sustainability and resource conservation. The requirement to retain at least 50% of the building aligns with the principles of building reuse, which emphasizes the reduction of construction waste and the environmental impact associated with demolition. This threshold is set to encourage projects to value and utilize existing materials and design elements, which significantly lower the embodied energy compared to new construction. By maintaining 50% or more of the existing structure, not only is there a reduction in waste, but it also helps to preserve the character of the area while minimizing disruption to existing ecosystems. Adhering to this standard also positions projects to capitalize on potential credits under LEED, fostering a commitment to sustainable building practices. Thus, the requirement to maintain at least 50% of an abandoned or blighted building creates a balanced approach that supports both environmental stewardship and community revitalization.