1. Details - Wide shots of the entire building often don't give you a full sense of the character of a structure. The best way is often to get close (either literally or with telephoto lens) and get nice shots of the little details that make a building special.

2. Light - The way that light interacts with and travels through a building is a big part of the mood of a building. By finding areas where natural and artificial light create dramatic scenes, and photographing these with a slow shutter speed (tripod is helpful) a photographer can capture the light as it defines the building.

3. Patterns - Repeated patterns often define the large interior and exterior spaces of a building. By framing a shot so as to maximize the effects of repeated lines, structures and shapes, a photographer can capture the visual rhythm of a building.

4. Angles and shapes- Anything other than a right angle or a rectangular shape is worth photographing, and right angles can even be interesting if photographed well. Buildings are a collection of shapes. Photographers should look at them that way and emphasize interesting geometry whenever possible.

5. Surroundings - Buildings exist in a setting, and that setting helps to define the story of the building. Is the building in harmony with its surroundings or does it stick out like a sore thumb. If your shooting a wide exterior shot of a building, try to show how it interacts with the surroundings. Consider framing the building with its surroundings.

Copyrighted photos-the legal right of creative artists or publishers to control the use and reproduction of their original works
Stock Photos-are professional photographs of common places, landmarks, nature, events or people that are bought and sold on a royalty-free basis and can be used and reused for commercial design purposes. The photographer (or stock photography distributor) has ownership to the images, and the commercial designer has some limited usage of the photo (which is set out in the Terms of Service by the company you purchase the stock photos from). Some conditions of use may include things such as use of the images is licensed, not sold or in case of a stock photo being used in a magazine there may be a maximum number of copies of the image allowed to be printed under the agreement.
Public domain photos-Public domain is clip art, images, text, programs, etc. that is not copyrighted. Public domain clip art has no terms of usage or conditions attached and you may copy it, sell it, claim it as your own and use it in any manner that you wish. Public domain is often used incorrectly on Web sites when describing freeware, shareware, linkware and Web collections of clip art.
Royalty free photos-Clip art, images, graphics, photographs, art, music and other created content which may be offered to the public or individuals (normally for a specified amount of money) to be used in specified ways (terms of usage). The creator retains all copyrights and publishing rights. You may use and publish the clip art, images, music per the specified terms of usage but may not sale or distributed to a 3rd party.