The original owners of our house thought it would be a good idea to put a laundry "room" in the kitchen/dining area. There is an excess of space in our garage that I was hoping to convert into an actual laundry room. The issue is in the plumbing. The house has concrete subfloors, is single story, and utilizes septic. Since the septic access is on the opposite side of the house from the proposed addition what are my option for drainage? The only two I can come up with are either running the line down through the garage floor to the outside and then around the house to the septic (expensive), or treating it like a basement laundry and setting up a sump that would run through the attic straight over the current laundry drain point and then back down (preferred). Is the second option even possible? Are their any other options I have missed?