Determining historical cost basisMy dad's home was just sold in December. It had been purchased in the early 90's by his wife and him. His wife passed away a few years ago, and the house is in Los Angeles, California, and California is a community property state.To determine the cost basis and whether or not taxes are due, the value of the home at the time of her death (2007) must be determined. Whatever that price, my dad should get an automatic step-up in the cost basis.I know Zillow provides charts that go back passed 2007, but it's difficult to tell if Zillow's charts are accurate--they are definitely not accurate for my house in 2007, for example.If you were faced with figuring out the value of a home 7 years ago, how would you do it? What is the best/most-accurate means to determine a home's value in the past? Thanks in advance for any suggestions and/or guidance!johnDecember 03 2013 - North Hollywood00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.