Starting from the top, enter a compound answer. The second "word" in that answer will be the first in the next answer, proceeding downward, like an elevator.
Answer may be two words or a compound word
e.g. Ouside park area.... 'Playground' / Twin Towers memorial site.... 'Ground Zero', etc.
Enjoyed this, but I thought the last clue was awkward. I couldn't get the clue before it, either, so no help there. I thought you wanted the person who designs the house plans - architect or draftsman, etc. Maybe consider changing the clue to something like "design of a home - blueprint"?