From custom homes to full-service engineering plans across Florida, see your home in 3D before you begin building! Generally speaking, you'll need a Florida building permit if you plan to construct, enlarge, repair, alter, or demolish any building or structure.11" X 17" (Other documents 8 ½" X 11"). O A general construction plan: (a) Legible plans must be submitted in paper format, and be a minimum of 11 inches. The Building Code specifies two levels of verification of compliance: plan review and inspection. The plan review verifies that the plans are code compliant.