A new window is an investment and you need to make sure it's a worthwhile one.
Consider the cost of installing double-pane windows, triple-pane windows, or any combination of these. The price will depend on the size of the window opening, the materials used to frame it, and how energy-efficient it is. If you want optimal insulation, look for a triple-pane model. Otherwise, double-pane windows are sufficient. Disposal costs are sometimes included in the labor cost, but sometimes they're separate. Also, a professional will be able to clean up all debris from the job, making it much easier for you to enjoy the benefits of your new window.
If your home is an older model, the window replacement might not be possible. The original window frames may not meet modern codes, so you'll need to get a custom window instead. Regardless of the type of window, you should find a licensed professional to do the job. They will be better prepared to handle any unforeseen problems that might arise. Additionally, a licensed professional can provide you with an estimate for labor and materials. The final decision will depend on the design and style of the new window.