Which statement describes supplemental services provided by the architect?

• A. Supplemental services are extras defined upfront and priced in the contract, such as hiring a landscape architect.
• B. Supplemental services are extra requirements arising during construction and billed hourly.
• C. Supplemental services are included in the base fee with no extra charge.
• D. Supplemental services are illegal without owner consent.

Answer: (A)

Supplemental services cover tasks beyond the architect’s basic scope and require separate compensation. They’re defined and priced in the contract (often as addenda) so both owner and architect know what’s included and what costs extra. An example is bringing in a landscape architect to handle site elements outside the architect’s usual responsibilities. This upfront definition helps prevent disputes about scope and fees. Other formulations—such as extras billed hourly only when they arise during construction, or included in the base fee with no additional charge, or being illegal—don’t align with how supplemental services are typically planned and paid for in practice.