Tell us the project you want to build.
Where the project will be built.
Explain the existing room / building constraints if the building / room is already exists.
Explain routine activities that will / are usually carried out in the room / building to be built.
Mention the rooms / furniture that you needs in the building / room to be built
Attach photos of the location / layout / room (current conditions) in perspective.
Attach the design references you want.
Attach a land map if there is no existing building / house plan if there is an existing building.