Yes, you can sell your house without a real estate agent. You will need to be able to market your property with newspaper ads, flyers, and internet websites. You will also need to be readily available to schedule appointments, do showings, field phone calls and emails. Most people find it easier to sell a house thru a broker who will do all of that legwork for you.
It is possible to sell your house without a real estate agent. But make sure you know what needs to be done if you are going to sell it on your own. You don't want any problems later on down the road because you didn't do something right.