I know this is late in response, but it may help others, too.
Although I totally agree with Ross that an atty is your best route, it can be pricey, so check their credentials frist before paying them anything.
One way you can do yourself is check wiith the County Clerk's office for all permits. Any permit is required to be registered there. If no permits exist, check the county assessor's office for what they deem the property to have (2bd, 2ba, swqft, etc). Finally, check with the treasury to see if they have any outstanding liens or taxes. Using a referred by your lender Title Company can run a check for title issues.
Hope that helps.