Since "green building" is such a buzz phrase, it's important to make sure that your contractor is truly committed to the ideas and practices of sustainable construction. Unfortunately, there are those out there who will tout a "green" style of construction -- but won't follow through. That's why it's important to make sure that your contractor is devoted. A good way to check on this is through past clients or examples of work. A glowing review from a pleased customer or a walk through the physical evidence of a job well done will help settle your mind.