Replacement windows can lower your energy costs and increase the resale value of your home, making them a cost-effect upgrade for your home. There is a wide variety of replacement windows Washington homeowners can choose from, but it is important to take your time in making your decision. It is essential that you research your options and read the reviews before making your final decision, but it is even more important that you choose windows that are low-maintenance, easy to clean and have a high energy-efficiency rating.