Dee is exactly right. "Zillow and Trulia just go by location, age, size. etc. In other words--they go from the statistics. They have no way of knowing the difference between Oliver Park North and The Avalon tract. Hope this helps." I lived on Irwindale and have done loans in the Avolon Tract. Just imagine if you are the designer of the web site trying to get foot traffic to warrant adverisement. It 's all off statistics to give us an idea if everything is perfect. I love those sites but take with a grain of salt! Valerie is right with "If you are trying to establish the market value of your home just because you are curious, then look at the recent sales (last 6 months) within your neighborhood. Find the homes that have similar number of bedrooms and bathrooms and comparable size... then you'll find the market value of your home."