Many folks are absolutely convinced that their homes are too small. Some are absolutely right depending on the size of their home and family as well as their lifestyle. Some are absolutely wrong.
Before a contractor is called to build a great room, devote some time and effort into weeding out all of the excess stuff that has somehow accumulated over the years. The rest should be organized and put in an appropriate place. Whatever the circumstances, it will be time well spent.
If uncontrolled clutter is the driving force behind increasing the size of a home, then the space issue will never be resolved. In reality, the problem will just become worse along with the clutter. The result will inevitably be more useless stuff over a wider area.
By efficiently using the space that is already available, there are many advantages to be gained. Out-of-pocket expenses for the cost of an addition could be eliminated all together or at least reduced if there is still some type of expansion still warranted. As an added bonus, there will be less of a strain on the household heating and cooling budget. It will also be easier to clean and maintain.
Delusions of grandeur can be trouble if an underlying clutter issue is to blame. Bigger will not get you better. With equal parts of creativity and practicality, an organized house might very well turn into a more spacious home without the headaches and added expense of putting on an addition.