Zillow and Zestimates in Texas
The following information was taken off of Zillows website about the accuracy of their valuation in different markets. Texas is a non disclosure state, meaning that the sales prices for real estate are not recorded as public information. Each individual municipalities board of Realtors® keeps track of the actual sales prices of real estate and to gain access you must not only be a licensed real estate broker in the state of Texas but additionally a due paying member of the local board of Realtors®. In order for a real estate broker to provide a non-licensee with specific MLS data there must be a written working relationship between the two parties.
To sum this article up, Zillow has no idea what the value of real estate is in Texas. San Antonio has a one star accuracy, Houston one, Dallas two. To try and make educated opinions based on these figures is completely ridiculous.