In general, porches and awnings on the outside of a house will not qualify as being part of the house for the halachot of carrying on Shabbat if there is no eruv. The porch or awning must be in the structure of a shape of a doorway (tzurat ha'petach): vertical poles and cross beams must be on TOP of the vertical poles in order to be considered a halachically enclosed area.
Note Since these are not intended to be a doorway, no mezuza is required on them.