If you don’t know what to add in your home? According the Money Magazine Sept issue that adding a master bathroom will be A big payoff from the tiniest room.   ”Adding a new bathroom will enhance your quality of life - and the value of your property - like few other home improvement projects will. Put in a master bath, and you won’t have to take turns with the kids every morning. Install a powder room, and dinner guests won’t have to traipse through your private terrain. While you can’t count on recouping the cost of any upgrade right away in today’s weak housing market, over the long term adding a bathroom can boost your home’s value by some 20 percent, says Paul Emrath, an economist at the National Association of Home Builders.”