If you have made any structural changes to your property that were not permitted and inspected, you will have to tell the buyer on the required Residential Property Disclosure Statement. That will make most buyers nervous, and even if they are not concerned, they will use it as a negotiating lever. As a result, it is almost always better to get the space inspected and make any necessary repairs. If you did it right in the first place, it is usually not a big deal. The inspections are inexpensive and fairly quick. If you have questions, call the city or town (or the county if you are not in an incorporated area) and ask them anonymously.