Landscape Design for new house build

I am building a new house and would like some landscape drawings completed to assist the landscapers with designing and quoting our project. I have architectural drawings of the house and block layout, along with some photos of the existing back garden. The main goal is to get a better understanding of how the house will sit on the site and how the front yard and back entertaining area can be incorporated into the existing landscaping. The site is slightly sloped so I am wanting to visualise retaining walls and garden beds etc.