What is meant by "Reduction in Performance Level [Change of Use]"?

The term "Reduction in Performance Level [Change of Use]" refers to a situation where a building or structure experiences a decrease in its functional efficiency due to a change in its use. This concept is significant in building design and safety standards, particularly when a building is repurposed for a different function than it was originally designed for.

When a change of use occurs, the original design parameters and safety measures may no longer adequately serve the new purpose, leading to reduced performance in how the building meets its intended requirements. This could manifest in various ways, such as inadequate heating or cooling for a different type of occupancy, insufficient load-bearing capabilities, or non-compliance with current codes that apply to the new use.

Functional efficiency encompasses the overall effectiveness of a building to serve its intended purpose, taking into consideration aspects like space utilization, comfort levels, and safety compliance. Therefore, a reduction in performance level reflects a decline in how well the structure meets the needs of its new occupants or functions, making it critical to reassess and potentially modify the building to ensure it remains safe and functional under its new use.