I highly recommend reading "Commissioning Architectural Photography". This pamphlet is a joint effort developed by the American Institue of Architects (AIA) and the American Society of Media Photographers (ASMP). It is a great resource for anyone thinking about hiring an architectural photographer. The document is full of great information, explains best practices in understandable terms and will answer most of your questions.
If you still have general questions or wish to discuss your project in detail, please call me at (630) 605-3976. I'll be happy to discuss how we can work together on your specific project.