Measure your basement window. Some types of windows do not come in all sizes. Knowing what size you need will help narrow your search.
Create a budget. Making a budget will give you an idea of the type of basement window you can afford.
Decide on the type of window. A wide array of options is available for basement windows. Do you want the window to match the others in your home? Is stained or blocked glass something you are interested in? Wood or vinyl casing? These are all things to consider when shopping for basement windows.
Visit your local home improvement stores and talk to the window replacement specialist. Give him the measurements of your window. He will be able to give you some available options.
Shop around at various stores and online vendors. To get the most for your money, visit multiple stores and get multiple prices. You do not want to buy the first window you see in the first shop.
Read up on basement windows. Find out all you can about the types of windows available as well as reviews of the windows. This will give you an upper hand when window-shopping.