The MLS is showing this property is currently a "Contingent" short sale (more than likely the seller has approved the buyer's offer and is waiting for final lender approval).
Regarding permits, you can go to the city/county department of planning/records and verify the history of any permits and additions. The termite inspection/clearance tags are usually found attached to the garage wall showing the company/technician and date of the last inspection and/or when the clearance was issued.
Since this is a short sale, the owner of the property should be providing the buyer with full disclosures. The TDS (transfer disclosure statements) from the seller should show if they have any knowledge of any improvements, repairs etc... and the condition of the property to the best of their knowledge.
In addition, you should always due your own due diligence and have a home inspection performed. If you feel the need, you can always have the roof inspected by a licensed contractor (at your expense) before removing your contingencies and completing the transaction. You might want to wait having the inspections done until you get the lender(s) written approval, because there isn't any guarantee that the short sale will be approved.
FYI... This home has been sold three times within the last 9 years: 9/20/04, 05/09/02 and 12/15/01. I hope this helps...
With Kind Regards,
Bank Owned and Short Sale Specialist
Weichert Realtors Elite