Residential 3 Season Rooms require permitting and inspections.  All construction is required to conform with the 2015 International Residential Building Codes (IRC), and the 2014 National Electrical Code (NEC).  Sun rooms can also meet the specifications set forth in AAMA/NPEA/NSA 2100-12.  Complete plans showing the new construction & how it is tied into the existing is required. These plans do not need to be professionally drawn, but must be neat, legible, and include all the required information on construction member sizes and spacing.