I want to Increase the width of my kitchen by 2 feet, Is it possible?
There is not enough info to really answer, but generally as long as your willing to loose the two feet somewhere else then yes you can extend the kitchen. 

A lot depends on the type of construction and other factors, your contractor/builder will know best. Again, generally, as long as your staying inside the exterior walls, just about anything can be done. 

Other considerations exist however. In some construction types plumbing is laid before the concrete is poured. In those cases it may be expensive to move something like the sink, at the same time, it may cost next to nothing to move an empty wall over 2 feet into what was going to be a closet or something. 

There are possibilities, but it will depend on your floor plan, your builder, your construction type, and other factors. Your builder is the best to ask about this type of thing.