Building a “sun room” without HVAC is possible. Defining a “sun room” varies by person that is asked.
Our definition of a sun room is a room that is primarily glass but is not necessarily heated and cooled. Some people refer to a screen porch as a sun room. Others refer to any room on the back of the house as a sun room. A more classic definition of a sun room is a room that is used for recreation and escape and allows maximum light exposure to make you feel more like you are outdoors!
Archadeck of Charlotte builds classic stick-built construction that is designed to match the architecture of your existing home.
The only legal way to build a sun room with out heating and air conditioning it in Charlotte, NC and the surrounding area is to leave the existing door from the house intact completely. Once you modify the opening in anyway, the code then calls for the room to be completely insulated and HVAC installed to code.
For more information on sun room design and building codes, go to archadeckofcharlotte.com