A veranda is just a small roof hung off the side of the outside wall with
a
few upright supports; it may even have just a decking floor. Or look at
it
as decking with a roof hung off the side of the house. Amazing, in that a
conservatory which can be 30% of the house floor area and fully enclosed,
have no planning or building control,

Such a structure would almost certainly require planning permission and be
subject to building control aswell.

when a veranda is open on all side and
is rather much like an awning. Maybe an awning is the better approach if
it
is not to be fully made into an extension room.