I am a licensed General Contractor as well as Realtor in Vero Beach. First lets cover the easy item, yes the tile should have added value to your home. I am familiar with the building process and the permitting process. If you like I can visit your home and see the items you mention, and to review the Permit to see if the County should be allowing you to construct the screen room. Please give me a call to arrange a mutually agreeable time to visit.