Which of the following is considered an additional service in architecture?

Multiple site evaluation is considered an additional service in architecture because it typically goes beyond the standard scope of architectural services. Standard services usually include basic site selection and design processes, but evaluating multiple sites requires more extensive research, analysis, and consideration. This process may involve assessing various factors like zoning regulations, environmental impacts, site accessibility, and potential costs associated with each option.

In comparison, the other options generally fall within the regular scope of architecture services. For example, site selection is more fundamental, revising existing design plans can be part of the standard design process, and final construction inspection is usually included in the contract's basic services, ensuring that the completed work aligns with the design intent and specifications. Hence, multiple site evaluation stands out as an additional service because it entails a deeper engagement and broader assessment than what is typically expected in standard architectural practice.