What would you say is the most beneficial add-on in mountain home design?

If you have ski in/ski out access, providing a dedicated mudroom with storage for skis, boots, exterior clothing and accessories immediately adjacent to a large laundry room and drying rack will help contain all the ski gear without damaging floors or having equipment spread out all over the house. If you need to drive to the ski hill for access, providing those same storage solutions in the garage is critically important.