Check the full elevation
Decorative hardware can look proportionate on a sample but different across a double-width opening. Review the intended placement on the actual layout. Consider how windows and section lines interact with the accents rather than treating each feature as an isolated accessory.
Distinguish decoration from operating parts
Ask which items are visual accents and which perform a mechanical role. The distinction helps you understand the quotation and future care. Do not use decorative pieces as lifting points or assume they establish how the door operates.
Confirm the supplied finish and fitting
List the chosen hardware set in the order and discuss how it is installed according to the product requirements. If you are considering a later addition, ask the manufacturer or installer about suitability first. Keep any separate work visible in the agreed scope.
Your questions
Can any decorative kit go on any door?
Compatibility and attachment requirements need checking. A kit that resembles the desired style is not automatically suitable for the selected construction.
Are handles included in a carriage house quote?
That depends on the selected package. Have decorative accessories named explicitly so there is no ambiguity about what arrives with the door.