Short answer, yes you can.
Many people who have tackled this project on their own, eventually recommend using a professional service in order to get the most thorough cleaning for your home. Some homes can be simple while others can be very dangerous. In the long run, it may not be advantageous for you to tackle a serious project like this.
Professionals use specific chemicals that work quickly and safely on dirt and stains. Our professional pressure washing equipment is also superior to what you can buy or rent at your local store. Results usually last longer than DIY efforts.