Which of the following is an example of supplementary services that an architect might charge extra for?

• A. Offering more than one design option
• B. Certified designs (LEED, etc.)
• C. Post occupancy evaluations
• D. All of the above

Answer: (D)

Supplementary services are activities that go beyond the standard design and construction administration tasks and are billed separately. Each item shown fits that description. Providing more than one design option adds extra schematic design work, evaluation, and client meetings beyond the baseline deliverable. Certification designs like LEED require specialized services, additional documentation, third‑party verification, and fees beyond the usual scope. Post‑occupancy evaluations involve follow‑up fieldwork, data collection, and analysis after occupancy, which aren’t part of typical construction administration. Because these represent work outside the base scope, they’re all considered supplementary services, making “All of the above” the best answer.