Location encompasses many factors such as schools, distance to shopping, access to major highways, as well as location in the neighborhood.
What have other similar properties sold for ? What is the demand for homes in your area? How many homes around you are currently listed for sale?
Actual Age vs. Effectual Age. An older home that has been maintained may have a greater value than a newer one that has been neglected. Is it time for some repairs or painting?
Buyers will pay more for a well kept house that is move-in ready than they will for a house that obviously needs some attention.
Have you added on a new bathroom or updated the kitchen? These are factors which will improve your home's marketability.
Is your neighborhood a swim tennis community, have property values remained the same or increased over time?