The principles in a real estate development project in Houston Texas include one of the parties involved in a real estate transaction such as the buyer or seller. If there is a broker involved they may be referred to as the principal broker. So in essence anyone taking part in a real estate deal in Houston Texas is known as a principle. The Principles of real estate may also refer to a book on real estate developing and investing that is used in universities for people studying real estate development or any other course involving real estate. To learn more about real estate investing and development, it is advisable to follow and read real estate experts such as Edward Casey of Houston,Texas who will most likely give you all the details about real estate and also visit his website www.house911.com to learn more about real estate and get the latest listings.