Looking at it I would go a different route than just putting in a deck. It doesn't look like there is a great deal of space to build considering the placement of the garage.
If cost isn't a factor, I would suggest moving the door to the right side of the house and put a larger window in the front. Then you could possibly put a deck on the side with steps facing the driveway. Just a thought.
Of course this is all dependent on what is directly behind that front wall.