Yes, architects review and plan houses based on the site. They may also employ landscape architects and engineers in order to determine specifics like grading, utilities, etc.

It's helpful to have a decent survey with elevations here. I had a detailed survey with key / specimen trees located to assist my architect in our house placement.

(full disclosure, brother is surveyor and cheap labor)

I'm not sure what you're asking.

If you’re looking to hire an architect, start with your state registry, and then the indudtry trade orgaization. What you’re asking for is paid work. Not internet freebie tips.

We needed a comprehensive land survey to give to the design team. They then designed the home for the site. But the land survey was first