Looking at a property with MLS/ Tax discrepancy

[Christof Gardet]

Hey all, forgive me if I'm posting in the wrong forum still new and new to the app. I'm in the Richmond VA market. I have been following a piece of property for a couple of weeks and through analyzing the tax records there is a discrepancy in rooms. MLS has 3 bedrooms and the tax record is stating 2. I think there was an addition done to the property without permit. How can I research more into this? What would I be looking at if I wanted to continue with the purchase (if I got a good deal i.e. Pay for the cost of the land under the building.) would it be worth the potential head ache?