Depending on whether this is a commercial or residential project, things you might consider bringing:

• Magazine pages of buildings and interiors you like
• Floor plans you've developed
• Your site plan and survey
• Copy of local building codes
• Photos of the site
• Your budget
• Projections
• Lists of materials you like or hate
• Kinds of lighting you will need
• Number and kinds of pets
• Number of children (or anticipated children)
• Number and kind of employees, deliveries, and level of security you want.
• Additional spaces such as: an Office, Studio, or a Workout Room.