you can also visit the LA Co. Assessor's website to look up homes. If you are planning to purchase or sell, then you'll want the sales of comparable homes, which is a little more challenging. You could either contact a Realtor, or try http://www.zillow.com
Trulia has information on our site for homes sold within the last 9 months. Below I've provided a link to the results of that search.
I hope this helps.
Customer Service Representative
For a more precise evaluation of YOUR home within the zipcode, please visit my website and I shall be happy to complete a Comparative Market Analysis for you.
You can also contact a title company and get the information. They'll get the information through the public records.