There are several advantages and disadvantages of installing a bay window. The advantages are: They add aesthetic value to the house. It provides elegant and spacious look to the home. Another benefit is, it allows natural light and breeze to enter. Additionally, it provides clearer and larger outside view. The disadvantages of installing bay windows are, it is tiresome to install window treatment hardware like curtains. Whereas, this disadvantage can be easily converted to an advantage by hiring a professional. The end window treatment only adds aesthetic. The advantages outstand the disadvantages.