Retrofitting your home while using green building practices not only helps you by saving you money on energy in the long run, it helps the environment by improves your indoor air quality. Beyond the more basic retrofitting projects, if you are able to install renewable energy resources, you may be able to free yourself of being dependent on the electrical grid. Another benefit is the increase in the comfort and livability of the home.
Finally, you will see an increase in the appreciation of your home and market value compared homes that have not been retrofitted, and, subsequently, when it comes time to sell, your home will likely spend less time on the market.